2014年12月27日星期六

What is the analog input module?

The plc analog input module is a remote site analog signal acquisition device to the computer, which utilizes RS-485 bus as a data communication lines, providing analog to 485 function, can simultaneously eight analog input to the plc module, and by RS-485 bus transfer to the computer. Thanks to RS-485 interface as a communication interface, which can be a combination of multiple modules analog signal transmission more large ones, and can be dispersed in a 485 line, using the address code to distinguish, can directly access the MODBUS RTU protocol configuration software.
Analog is any value within a certain range of continuous change, with a state is antithetical to the digital representation. Typically used for analog capture and presentation of things, such as voltage and current, or frequency parameters. The analog input module is a possible acquisition of analog (such as voltage, current, thermocouple, RTD, temperature and other values) is transmitted to a computer via a smart module 485. The communication protocol uses MODBUS RTU protocol, and industrial data acquisition to achieve a unified docking program is also very convenient.

2014年12月26日星期五

PLC input module

Provides a large number of features, such as user supportplc programmablecommissioning and maintenance work.
High-speed execution of instructions:
The minimum instruction execution time of up to 0.01 μs, for the low-end performance of the device and create a new application program.
Floating-point arithmetic:
You can use floating-point operations efficiently even complex arithmetic functions.
User-friendly parameter assignment:
Only a software tool with a unified user interface, you can complete the work of all parameterized modules. This lowers the entry threshold and training costs.
Human Machine Interface (HMI):
PLC's operating system has been integrated with the user friendly interface services. These functions are no longer needed costly programming: SIMATIC HMI systems process data requests to the PLC,small plc to complete the transfer of these data in the desired update time. PLC operating system can autonomously complete the transfer process. And the full use of the same reference numerals and the database.
Diagnostic functions:
Intelligent diagnostic system CPU continuously detection systems, fault information and specific system events (for example, time errors, module failure, etc.) records. Use of environmental buffer record event information, and with a cut-off time, in order to facilitate future troubleshooting.
Password protection:
Use password protection function efficiently and reliably protect user information to prevent unauthorized copying and subject to change.

2014年12月23日星期二

The analog input module has the following mechanical properties:

Compact design
Rugged plastic enclosure in include:

Group fault indication red light
Front connector plug options, installed behind the front door and get protection.
Label area on the front door.
Connection pin assignment is for the internal wiring in the front door.
Easy to install
Modules are mounted on a DIN rail and connected to adjacent modules through the bus connectors. No slot rules; the input address is determined by the slot.

When used in the ET 200M distributed I / O system with active bus modules, plc digital input output module are hot-swappable, without any response. Other modules continue to work.

User wiring
Device unit is connected via the front connector. When the first connection module, the encoding device is locked in the connector, so that the connector can only be adapted to the same type of module. When replacing modules of the same type for the new module can be left intact to maintain the state before wiring connector. This avoids the process of replacing the plc module will be wired front connector into the wrong module.

2014年12月21日星期日

What is a PLC module?

PLC module is the functional unit of the plc analog output module were made as the building blocks of modules that can be combined as needed to accommodate a variety of needs, commonly used power supply module, CPU module, digital input modules, digital output modules, analog input modules, analog output modules, high-speed counter plc output module, communication module, digital input and output modules, analog input and output modules, Where there are a variety of specifications for each model. May need to be combined in accordance.

2014年12月8日星期一

Analog Output Module

DAM-3713 Product Code: 960326600
plc analog output module
※ Mitsubishi LINK RS-485 communication, support a variety of configuration software
※ output range: 0 ~ 20mA, 4 ~ 20mA
※ Resolution: 12
※ Accuracy: ± 2 ‰
※ communication rate: 600 ~ 115200bps optional
※ plc output module isolation protection, communication port optical isolation
※ Built-in watchdog

2014年12月7日星期日

What is the analog input module?

plc analog input module is a remote site analog signal acquisition device to the computer, which utilizes RS-485 bus as a data communication lines, providing analog to 485 function, can simultaneously eight analog input to the module, and by RS-485 bus transfer to the computer. Thanks to RS-485 interface as a communication interface, which can be a combination of multiple plc modules analog signal transmission more large ones, and can be dispersed in a 485 line, using the address code to distinguish, can directly access the MODBUS RTU protocol configuration software.
Analog is any value within a certain range of continuous change, with a state is antithetical to the digital representation. Typically used for analog capture and presentation of things, such as voltage and current, or frequency parameters. The analog input module is a possible acquisition of analog (such as voltage, current, thermocouple, RTD, temperature and other values) is transmitted to a computer via a smart module 485. The communication protocol uses MODBUS RTU protocol, and industrial data acquisition to achieve a unified docking program is also very convenient.

2014年12月4日星期四

PLC Analog Input Module

plc analog input module are a kind of analog PLC Input Module of  Series PLC.  plc module is used to connect voltage and/or current sensors and RTD or thermocouple etc. It is divided into various types according to different signal types and connection modes. Its measuring precision is 16 digits with single-ended signal input. It supports hot plug. It's an intelligent module with self-diagnosis function, it can be automatically reset and restarted if operation failure appeared. It's unnecessary to set the hardware, intelligent plc will load parameters to it automatically after it being started.

2014年11月26日星期三

From PLC product line perspective

   From PLC product line perspective, Nanda proud extension NA400 and NA200 two existing series. NA400 series PLC is mainly used in all kinds of engineering automation, especially in the petrochemical industry, coal mining, rail transportation, plc analog input output io module  water conservancy and hydropower, plc analog input modules building automation, environmental protection, municipal and other areas;  plc controllers  NA200 series PLC, mainly in the field of automation engineering with NA400 series of product applications, focusing on logic control of packaging machinery, food pharmaceutical machinery, lifting machinery, engineering machinery, textile machinery and other fields.

2014年11月24日星期一

unnecessarily detailed analysis of the internal circuitry of the CPU

In the user view, unnecessarily detailed analysis of the internal circuitry of the CPU, but each part is working mechanism should be enough to understand. CPU CPU controller controls the work,plc analog input modules which it reads the instruction, plc communication module  the instruction interpretation and execution of instructions. However, the pace of work is controlled by the oscillation signal. Operator used for digital or logic operations, working under the command of the controller. Register to participate in operations, and store intermediate result of the operation, input output module plc  it is also working under the command of the controller.
CPU speed and memory capacity are important parameters for the PLC, which determines the operating speed of the PLC, IO, and the number of software capacity, etc., thus limiting the size of the control.

2014年11月19日星期三

In a redundant function implementation

In NA400 series PLC products, CPU401-0501 product is its representative products, which in addition to all NA400 series PLC as providing safe and reliable operation of  china programmable logic controller the system to all intelligent I / O design and a range of security, reliability, designed for protection, plc analog input modules but also with hardware redundancy. In a redundant function implementation, analog io module to achieve a complete scan of all data exchange, redundant communication rates up to 100 Mbps, users do not need any programming work and hot standby module, you can achieve redundancy, while hot-swappable replacement module can be flexibly applied to a single chassis and dual redundant system chassis redundant systems.

2014年11月12日星期三

In order to control the system is reliable

In order to control the system is reliable, usually Plc logic controllers installed in a protective housing of the control cabinet to prevent dust, oil, water splashing. intelligent plc  In order to ensure that its temperature is kept within the specified temperature range, install the machine should have enough ventilation space, there must be more than 30 mm spacing between the base unit and expansion unit. input output module plc If the surrounding environment over 55 degrees Celsius, to install the fan, forced ventilation.
In order to avoid electrical interference with other peripherals, programmable controller should stay away from high-voltage power lines and high voltage equipment, should leave at least 200 mm of distance between the programmable controller and high-voltage equipment and power lines as possible.

2014年10月31日星期五

Development Plc modules of

Plc modules to today, has formed a large, medium and small series products of all sizes. Can be used for all sizes of industrial control applications. In addition to the logic processing functions, most modern PLC has a complete data computing capability, can be used for a variety of digital control. In recent years, large numbers of PLC functional unit that infiltrated into the position PLC control, temperature control, CNC and other industrial control. And Development Plc modules plus enhanced communication capabilities of human-machine interface communication module plc technology, the use of PLC control system composed of a variety becomes very easy. Easy to use, well engineering and technical personnel welcome PLC as general industrial control computer, industrial and mining-oriented industrial equipment. It is easy interface, the programming language is easy for engineering and technical personnel to accept. Ladder language graphic symbols and expression and relay circuit is very close, with only a small switch on the PLC logic control instructions can easily achieve the function relay circuit. Is not familiar with the electronic circuits, computers do not understand the principles and assembly language people use computers in industrial control to open the door. System design, construction workload is small, easy to maintain, easy to transform PLC logic instead of using store-wired logic, greatly reducing the external control equipment wiring, the control system design and construction period is much shorter, but also becomes easier to maintain. More important is to change the program of the same device high-speed counter plc has been possible to change the production process. It is suitable for many varieties, small batch production applications. Small size, light weight, low power consumption In ultra-small Plc modules, for example, recently produced varieties bottom size less than 100mm, weighs less than 150g, power consumption is only a few watts. Due to small size it is easy to mount inside machinery, mechanical and electrical integration is to achieve the ideal control equipment.

2014年10月22日星期三

History of PLC

In the industrial production process, a lot of switching sequence control, which in accordance with the conditions of the order to move a logical and controlled chain protection plc controller manufacturers action in accordance with the logic of relations, and a large number of discrete data collection. Traditionally, these functions are controlled by pneumatic or electrical system to achieve. 1968 American GM (General Motors) companies to replace the electrical control device, following the requirements of the second year, the United States developed a digital control device company based integrated circuits and electronic technology, for the first time using procedural means used in electrical plc digital input output io module control, which is the first generation of high speed counter plc, said the Programmable Controller (PC). After a personal computer (referred to as PC) to develop, in order to facilitate, but also to reflect the high speed counter plc's features, programmable logic controller named Programmable Logic Controller (PLC), and now, still often referred PLC PC.

2014年10月16日星期四

Plc modules development course

In the late 1970s, the programmable controller into the practical stage of development, the introduction of computer technology has been fully programmable plc programmable intelligent controller controller, its function occurred leap. Higher operation speed, ultra-small size, more reliable industrial anti-jamming design, analog operation, PID function and high cost laid it in modern industry. The early 1980s, the programmable controller in the advanced industrial countries has been widely used. Features programmable controller is a large-scale plc analog input output io module development of this period, high-speed, high-performance, product serialization. Another feature of this stage is the national production of programmable controllers increasing world production rising. This marks the programmable controller has entered a mature stage.

2014年10月10日星期五

Definition of the PLC

There are many definitions PLC. International Electrotechnical Commission (IEC) is the definition of the PLC: Programmable Logic Controller is a digital electronic computing operating plc programmable intelligent controller system, designed for applications in industrial environments. It uses a programmable memory, used in its internal storage to perform logical, sequential control, timing, counting and arithmetic operations such as operating instructions, and through digital and analog inputs and outputs, control types machinery or production processes. Programmable logic controller and related equipment, all with industrial control systems should be easy to form a whole, to expand the principles of the design of its functions. The mid-1980s to the 1990s, is the fastest growing PLC period, the annual growth rate has been maintained at 30 to 40 percent. During this plc analog input output io module period, PLC capability in handling analog and digital computing power, man-machine interface capabilities and network capabilities have been greatly improved, PLC gradually entering the field of process control, in some applications in the field of process control to replace the dominant DCS systems. PLC has the versatility, ease of use, wide adaptation, can be * high anti-jamming capability, programming and simple. PLC in the industrial automation and control especially in order to control the position, in the foreseeable future, can not be replaced. 

2014年9月24日星期三

Evolution domestic PLC

Domestic PLC gone from imitation to independent research and development stage, software and hardware are showing more and more independent product, especially in the field of small PLC emerged in many plc analog output module excellent companies. Nanda proud Tinto PLC as a few of the large manufacturers to ensure product reliability, based on the products in order to strengthen the integration advantages, through custom development and localization services to build their core strengths, serving the industrial users.
      From PLC product line perspective, Nanda proud extension NA400 and NA200 two existing series. NA400 series PLC is mainly used in all kinds of engineering automation, especially in the petrochemical industry, coal mining, rail transportation, water conservancy and hydropower, building automation, environmental protection, municipal and other areas; NA200 series PLC, mainly in the field of automation engineering with NA400 series of product applications, focusing on logic control of packaging machinery, food pharmaceutical machinery, lifting machinery, engineering machinery, textile machinery and other fields.
      In NA400 series PLC products, CPU401-0501 product is its representative products, which in addition to all NA400 series PLC as providing safe and reliable operation of the system to all intelligent I / O design and a range of security, reliability, designed for protection, but also with hardware redundancy. In a redundant Plc high speed counting modules function implementation, to achieve a complete scan of all data exchange, redundant communication rates up to 100 Mbps, users do not need any programming work and hot standby module, you can achieve redundancy, while hot-swappable replacement module can be flexibly applied to a single chassis and dual redundant system chassis redundant systems.

2014年9月17日星期三

Evolution domestic PLC

Domestic PLC gone from imitation to independent research and development stage, software and hardware are showing more and more independent product, especially in the field of small PLC emerged in many excellent companies. Nanda proud Tinto PLC as a few of the large plc digital input output module manufacturers to ensure product reliability, based on the products in order to strengthen the integration advantages, through custom development and localization services to build their core strengths, serving the industrial users.
      From PLC product line perspective, Nanda proud extension NA400 and NA200 two existing series. NA400 series PLC is mainly used in all kinds of engineering automation, especially in the petrochemical industry, coal mining, rail transportation, water conservancy and hydropower, building automation, environmental protection, municipal and other areas; NA200 series PLC, mainly in the field of automation engineering with NA400 series of product applications, focusing on logic control of packaging machinery, food pharmaceutical machinery, lifting machinery, engineering machinery, textile machinery and other fields.
      In NA400 series PLC products, CPU401-0501 product is its representative products, which in addition to all NA400 series PLC as providing safe and reliable

plc analog input output io module
operation of the system to all intelligent I / O design and a range of security, reliability, designed for protection, but also with hardware redundancy. In a redundant function implementation, to achieve a complete scan of all data exchange, redundant communication rates up to 100 Mbps, users do not need any programming work and hot standby module, you can achieve redundancy, while hot-swappable replacement module can be flexibly applied to a single chassis and dual redundant system chassis redundant systems.

2014年9月11日星期四

Nanda proud extension product market direction

Nanda proud extension direction of the main market in favor of engineering automation, industry promotion but let companies see more opportunities. Therefore, Nanda proud extension of the main plc digital input output io module strategies for the Manufacturing Market to do fine, the star product; layout of key industries, the development of channel partners to do the landing services to ensure the steady growth of the market. In addition, the new government in strengthening the national plc digital input output module infrastructure construction and energy minerals sufficient for the enterprise development space, for Nanda proud extension will be based on the application of key industries, in collaboration with key customers, through customized services targeted product development. In recent years, South Extension proud customization in the industry in the development and application of effective, high-speed railway construction, oil field automation, automation and utilities have launched customized products to meet customer needs.

2014年9月3日星期三

PLC typical boot process

input Refreshrerun user programsand then output refreshthen enter refresh then run user programs and then output the brush never stop the cycle repeated manner. With PLC control is clearly possible. Because: With input refresh, enter information analog input plc can be obtained by monitoring the input circuit stores the PLC input mapping area; by running the user program, the output mapping area will get the information transformed; then by the output refresh, the output latch will reflect the state of the output mapping area, and generates a corresponding output via the output circuit. Also, because this process is never-ending cycle of repeatedly plc ethernet module engaged in ground, so the output always reflects the change in input. The only response time, a slight lag. Of course, this lag should not be too large, otherwise, control achieved not so timely, it lost control of meaning. To this end, the working speed of the PLC to be fast. Fast instruction execution time is short, is the basis for control of the PLC. In fact, its speed is very fast, execute a command, and more a few microseconds, tens of microseconds, only a few tenths less, or 0.0 microseconds. And this rate still increasing in.

2014年8月24日星期日

The working principle of PLC user program execution stage

When the PLC into operation, their work is generally divided into three stages, namely the input sample, a user program execution and output refresh three stages. Completion of the three phases is called a scan cycle. During the entire operation, PLC's CPU to a scanning speed of repeating the above three phases. User program execution stage In the user program execution stage, PLC always sequentially from top to bottom in order to scan the user program (ladder). When scanning each ladder, and always scan the ladder to the left of the control line by the contact form, and then first left and right, the first order under the control of the line formed by the contact logic operation , then according to the results of plc analog io modules, refresh the logic coil corresponding bit in the system RAM storage area status; or refresh the output coil corresponding bit in the plc analog io modules image area of ​​the state; or to determine whether to execute the ladder Special function instructions provided. That is, during the execution of the user program, the only entry point will not change in the status and data plc analog io modules mapped area, while the other output point and soft devices plc digital io module image area or system RAM storage area The status and data are likely to change, and came in above the ladder, the program execution results came in below who will use these data ladder coil or work; contrary, ranked below the ladder, it is refreshed logic coil state or data can only scan to the next ranked above it on the program work.

2014年8月22日星期五

PLC analog io module freely configurable data acquisition module FX2N-4DA

1) support standard modbus rtu protocol,, RS485 interface output via RS232, can and PC, PLC, touch screen like all kinds of data acquisition system.
2) plc analog io modules for all

plc analog input output io module
, communication ports with optical isolation.
3) All inputs freely configurable by software, you can connect any resistance, voltage, current, and other types of analog input module sensors, Free Transform range.
4) do not address acquisition module toggle switch is set directly by software, permanent anti-brownout protection.
Variety of auxiliary functions 5) software compensation to ensure the accuracy of data collection.
6)plc analog io modules Each CPU module can be connected to three expansion modules constitute the sub-station, a total of 32 analog input channels and 16 analog output channels.

2014年8月18日星期一

PLC analog IO module user program execution stage works

PLC works When the PLC into operation, their work is generally divided into three stages, namely the input sample, a user program execution and output refresh three stages. Completion of the three phases is called a scan cycle. During the entire operation, PLC's plc analog input output module to a scanning speed of repeating the above three phases. User program execution stage In the user program execution stage, PLC always sequentially from top to bottom in order to scan the user program (ladder). When scanning each ladder, and always scan the ladder to the left of the control line by the contact form, and then first left and right, the first order under the control of the line formed by the contact logic operation , then according to the results of logic operations, refresh the logic state of the corresponding bit in the coil system RAM storage area; or refresh state corresponds to the plc input output modules coil bit plc analog io module image area; or to determine whether to execute the ladder by Special functions prescribed instructions. That is, during the execution of the user program, the only entry point in the I / O status and data mapping in the region will not change, while the other output point and soft devices I / O image area or system RAM storage area status and data are likely to change, and came in above the ladder, the results of its programs ranked in the following who will use these data ladder coil or work; contrast, came in below the ladder, its be refreshed logic coil state or data can only scan to the next ranked above it on the program work.

2014年8月12日星期二

plc analog io modules is a remote site analog signal acquisition to the computer equipment

plc analog io modules is a remote site analog signal acquisition to the computer equipment, its use as a data communications bus lines, providing analog transfer function, can simultaneously eight plc analog input module to the module and bus transfer to the computer . As a result of the interface as a communication interface capable of multiple modules combination of plc analog input signal transmission more large ones, and can disperse the line configuration, using the address codes to distinguish, you can directly access protocol configuration software.

2014年8月7日星期四

How to extend the analog inputs and outputs - PLC scaling examples

Analog IO connection either 4-20mA or 0~10V pressure sensors, level probe and other analog devices. Since the programmable logic control plc or control engineer, you will need to get some knowledge from the PLC IO expansion modules, analog signal. Zoom helps the analog value measurement unit (pressure, level, etc.).
Most industrial applications often require measurement of engineering units to provide more meaningful data.
Input method as an example
If we want from our analog cards 32000 (engineering units) measured from the tank level 0-65 m so our L = 0, H = 65 maximum. From the analog input current value A13454. Now, if we calculate using our formula, we'll get on the current level of 23.7 meters.
Now the situation looks slightly different analog output module.
Digital PLC program must calculate the value is sent to the plc analog input output io modules. There are many ways to do this, but most industrial applications, if you use the measuring engineering units understanding easier.

2014年8月3日星期日

Analog IO module added to the PLC line

Directly increases the Click PLC line of discrete and Analog IO module. 24 V DC combination of discrete modules include 8:00 DC input / 8:00 DC sinking or sourcing output mode, four o'clock DC input / 4:00 relay output mode.
24 V dc four-channel analog input module, 13 resolutions, including 0-20 mA current input, 0~10V voltage input version; 12 resolution four-channel output module 4-20 mA current, 0~10V voltage versions. Also increased in the current and voltage versions of the four-channel input / 2 channel analog output module. The module has 13 inputs and 12 resolutions resolution output.
Four-channel RTD and thermocouple module with 16-bit resolution, also increased. RTD input module accepts Pt100, Pt1000's, JPT100, CU10, Cu25 heat and Ni120 elements; addition, support resistance range. Thermocouple input module supports nine types of thermocouples and voltage range.

2014年7月31日星期四

the advantages of PLC analog IO module

First, it allows you to find plc IO module close to being monitored or controlled process. This greatly improves noise immunity, as weak sensor signals are transmitted long distances before converted into a digital signal through a noisy plant environments. Omega universalplc analog IO modules using MODBUS RTU / ASCII protocol, which is supported by a simple majority of the 2-wire RS485 programmable logic controller. The second advantage is, PLC analog input plc significantly reduces the wiring in the main control panel, saving time and money, while repairs and upgrades are necessary. Adding additional sensors and control signals are connected to the RS485 link and modify the PLC program has been installed, use the new I / as easy as O. In addition, plc analog input output module, you can expand your process control system beyond the local I / O capability of the PLC. You can add a thermocouple, RTD, pressure and flow sensors do not support these types of input of a PLC. With PLC analog IO modules, your application is no longer dependent on the choice of the controller.

2014年7月25日星期五

Analog Output Module


plc module is normally used to drive the analog output voltage analog actuator (e.g., a proportional control valve) and a current loop drive actuators and various instruments. Each board depending on the type of output, typically supports multiple channels. The output channels can be isolated individually or grouped isolation. 
 In the above diagram, we give a basic serial architecture, using I2C or SPI serial bus, the on-board processor through the isolator serial control information sent to the specified channel DAC, converted to output module plc. If you need to isolate each output separately, you will need to provide a way for each channel output DAC; If you allow grouping isolation, DAC subsequent distributor can keep hold capacitor DAC output until the next refresh. After the DAC, there are usually additional calibration circuit and an output buffer for fine tuning signal to provide the necessary voltage or current drive.

2014年7月22日星期二

Plc Input / Output Modules Description

The type of input modules used by a PLC depends on the type of input device. For example, some respond to digital inputs, which are eitheronoroffwhile others respond to analog signals. In this case, analog signals represent machine or process conditions as a range of voltage or current values. The plc digital input output module converts signals into logic signals that the CPU can use. The CPU evaluates the status of inputs, outputs, and other variables as it executes a stored program. The CPU then sends signals to update the status of outputs.
Output modules convert control signals from the CPU into digital or analog values ​​that can be used to control various output devices. The programming device is used to enter or change the cpu modules program or to monitor or change stored values. Once entered, the program and associated variables are stored in the CPU. In addition to these basic elements, a PLC system may also incorporate an operator interface device to simplify monitoring of the machine or process.

2014年7月18日星期五

distributing plc analog io modules

  You can install the plc analog io modules locally in the same chassis as the controller. Additionally, through the use of I/O communication networks, you can distribute the plc analog output closer to the sensors and actuators, reducing your wiring costs.
  In-Cabinet (IP20) distributed plc analog io modules can be placed throughout your application and requires an enclosure. Our In-Cabinet Modular pulse input module plc products let you select the exact mix of I/O interfaces and communication adapters to fit your needs, providing greater flexibility in designing your system. In addition to a wide range of analog, digital, and specialty modules, we provide in-cabinet I/O options for extreme environments, I/O for safety systems, and intrinsic safety (IS) I/O that can be distributed throughout hazardous areas.

2014年7月13日星期日

plc analog output module acquisition module in the Control System

In the industrial production process, there are many of the continuous change, such as temperature, pressure, flow, level and speed are all analog. In order to deal with analog programmable controller must achieve A Analog (Analog) and Digital (Digital) between the A / D conversion and D / A conversion. PLC manufacturers are supporting the production of A / D and D / A converter module, the programmable logic controller for analog control. And in the actual IO module plc environment, the system often plc analog output modules weak current or voltage signal (mV or mA level), and generally with a load capacity is low. Direct implementation of the remote monitoring device is used, often because of the attenuation caused by long-distance transmission signal, distortion, and sometimes due to industrial automation plc external signal errors caused by signal interference, affecting the normal operation of the entire system. This requires that we ask for RTD, thermocouple temperature signal and the current and voltage signal acquisition, the digital output port via RS485 serial interface using standard communication protocols to transfer data to the PLC.

2014年7月11日星期五

plc analog input module is continuously changing physical

plc analog input modules are continuously changing physical quantities such as voltage, temperature, pressure and speed, such as PLC, can not directly handle digital output plc, analog input module requires use of A / D converter converts the analog input signal into a proportional to the digital. PLC in digital (such as the output of the PID controller) with analog output module requires the programmable logic controller plc converter to convert them into the corresponding digital proportional voltage or current for external actuators (eg electric control valve or drive) to use.

2014年7月10日星期四

The main features of PLC analog io module

Using imported IC electronic components, plc digital input output module, TI and other famous brands 
Communication port and DI \ DO adopt isolation circuit protection design, stability 
Advanced SMT chip processing technology, three anti-paint surface treatment 
32-bit industrial automation plc processor, not 8-bit microcontroller, higher performance 
New user program encryption, no break, after opening the ladder to prevent unauthorized reading 
Compatible FX series plc analog io modules programming software GX8.52E, without conversion, and support instruction Mitsubishi 90% 
15K comes with 2-way high-speed pulse input 
RS422 communication port configuration 
Independent patent shell, beautiful and generous, direct mounting rails 
Support calendar clock (to be customized), retentive register 
Professional supplier of small PLC, powerful \ unmatched.

Specifications PLC analog io module

Power supply DC24V 
Programming Software:plc input output modules or FX series plc analog io modules and programming software GX8.52 following version 
This machine adopts imported high-performance industrial grade chip design can be adapted to industrial environments with high electromagnetic interference 
High-speed operation, the basic instructions for each step 0.08US 
Programming language using ladder 
Cyclic scanning mode 
Built-24V/500mA DC power supply for other original peripherals, such as proximity sensors, etc. 
Easy to install, direct mounting rail or fixed hole mounting (dimensions see product specification).

PLC analog io module freely configurable data acquisition module FX2N-4DA:

1) support standard modbus rtu protocol,input module plc interface output via RS232, can and PC, PLC, touch screen like all kinds of data acquisition system. 
2) plc analog io modules for all input and output channels, communication ports with optical isolation. 
3) All inputs freely configurable by software, you can connect any resistance, voltage, current, and plc temperature control module types of sensors, Free Transform range. 
4) do not address acquisition module toggle switch is set directly by software, permanent anti-brownout protection. 
Variety of auxiliary functions 5) software compensation to ensure the accuracy of data collection. 
6) Each CPU module can be connected to three expansion modules constitute the sub-station, a total of 32 analog input channels and 16 analog output channels.

2014年7月5日星期六

plc analog input module volume manometry explanation

plc analog output modules measured voltage values​​, active power, reactive power, temperature, etc. and transformer tap positions measured value represents the amount of profibus module plc quantities (also known as logical volume) control, also known as analog. Hitachi reagents because the instrument is not to draw the lessons by volume parameter settings, but to be more absorbing part (in this section referred to as analog), the purpose of this design is to prevent high-speed counter plc diluted. Compare it to the operating mode changes continuously called physical analog. Multimeter pointer deflection intercropping continuous change at any time, and maintain a correspondence between the input, so called analog multimeter (VOM).

2014年7月4日星期五

plc analog input module illustrate

In or on the value of time is called a continuous physical plc analog output modules. The analog plc intelligent controller indicating the called analog signal. Operating in the analog signal to an electronic circuit called an analog circuit. 
For example: 
Thermocouple voltage signal at the output of the work belongs to an analog signal, because in any case the measured temperature jumps are unlikely to occur, so the measured communication modules plc signal either in time or quantity are continuous. Moreover, the voltage signal of any value in a continuous process of change is a specific physical meaning, that means a corresponding temperature.

2014年7月3日星期四

plc analog io module for two-point conversion

Analog plc analog io modules for converting the two points (voltage value and current value) of the analog input value of the digital value 12, and the process is further plc power supply module to a control value (here, the PLC). FX2N-2AD can be used to connect FX0N, FX2N, FX2NC series of procedures and control systems. 
(1) analog value is set by selecting the input voltage or current value (using the cable way to enter) to complete. Meanwhile, the general assumption set two-channel analog input values ​​(voltage or current values​​). 
(2) The analog input industrial automation plc ​​of these two channels can accept 0 ~ 10V DC (points), 0 ~ 5V DC, or between 4 ~ 20mA, please select your eigenvalues ​​in these two ranges. 
(3) The analog input value is adjustable. 
(4) The module can automatically allocate 8 I / Point O (input / output) to the input or output value.

2014年6月25日星期三

PLC analog input module - Input circuit

Input in the form of circuit 
PLC input circuit classification, according to the type of programmable logic controller manufacturer power supply, can be divided into the DC input circuit and the AC input circuit; Press PLC input module common terminal (COM client) current flow can be divided into source and drain input circuit input circuit; by plc analog input output module emitting diode common connection method can be divided into common anode and common cathode input circuit.

2014年6月24日星期二

Ensure PLC analog input modules work

We know, PLC analog input module in order to prevent interference generated by the external circuit (e.g., voltage spikes, the interference noise, etc.) caused by abnormal operation of the PLC plc sequence of events recording module a damaged components, generally in the PLC input side plc industrial controller are used to cut off the PLC Contact the internal circuit and external electrical circuit to ensure the normal operation of the PLC. And in the input line has a RC filter circuit to prevent false signals due to the input jitter or pulse caused by external interference.

2014年6月15日星期日

plc analog input modules features:

1, collecting multiple plc analog input modules, using industrial terminals, support rail mounting. 
2,485 interface input connected to the computer, and plc power supply module provide optical isolation. 
3, using MODBUS programmable logic controller (plc) suppliers communication protocol, enabling customers to unify PC management platform. 
4, analog modules can be cascaded by 485 to use, easy system expansion.

2014年6月8日星期日

plc analog input modules defined explanation:

plc analog input modules is any value within a continuous range of variation, with the state of the digital representation is opposed. Typically used to capture and represent the analog of things, such as voltage and current, or frequency parameters. The analog input module is a possible acquisition of analog (such as voltage, current, thermocouple, plc digital input output module, temperature and other values​​) is transferred to a plc intelligent controller via a smart module 485. Its uses MODBUS RTU communication protocol agreement with the industrial data acquisition to achieve a unified docking program is also very easy.

2014年6月4日星期三

plc analog input modules technical parameters:

1, 8-way acquisition AI ones 
2, collecting voltage range :china programmable logic controller DC 
3, collecting current range :4-20 mA 
4, the maximum sampling frequency of 20 times / sec. 
5, the serial port baud rate defaults to plc digital output, customers can also specify settings for other baud rate. 
6, plc analog input modules for the 9-12V DC power supply with overvoltage overcurrent protection against reverse function.

2014年5月29日星期四

conversion characteristics and plc analog io modules between

plc analog io modules suitable for connecting analog sensors and actuators. 
plc analog io modules features: 
4 inputs, 2 outputs 
6ES7 334-smart plc analog input (4 RTD) / analog output (2-way) 
communication module plc 334-0CE01-0AA0 analog input (4) / analog outputs (2-way) 
Analog input / output modules convert: 
The conversion of analog signals to digital values ​​required PLC 
The PLC of the process of converting the digital signal to analog signals required.

2014年5月7日星期三

Advantages plc analog output module Where

The advantage of using plc analog output module Where
 Release There are many different power modules plc analog output module on the market, with different product input voltage, output power, function, and so on different topologies. Using the power module can save development time and make products to market faster, and  plc digital input module therefore the power module integrated solutions than winning. Multiple power module has the following advantages: 1, respectively, each module can be rigorously tested to ensure that it is highly reliable, including power-on test to eliminate substandard products. In contrast, the integrated solution will be more difficult to test, because the entire power supply system and other functional systems closely together on the circuit.
2 plc analog output module vendors can plc analog output module  design different sizes of the same module in accordance with the existing technical standards for the design of the power supply engineers with a variety of different options.
3 plc analog output module design and testing of each module are carried out in accordance with the performance standards, will help reduce the use of new technologies to bear risk.
4 If using an integrated solution once the power supply system problems, we need to replace the entire motherboard; If using  plc power module a modular design, as long as the problem can replace the module, it will also help save cost and development time.

2014年5月5日星期一

plc analog input modules basic knowledge sharing

plc analog input modules can be mounted directly on a printed circuit board power supply, which is characterized by specific integrated circuit (ASIC), digital signal processors (DSP), a microprocessor, a memory, a field programmable gate array (FPGA) and other digital or analog load to provide power. Generally, this type of module called load point (POL) power supply systems or use special point of power supply system (PUPS). Because of the many advantages of modular structure, so the module power is widely used  plc analog output module to exchange communications equipment, access equipment, mobile communications, microwave communications and optical transmission, routers and automotive electronics, aerospace and so on. Especially in recent years due to the continuous promotion of the rapid development of data services and distributed power supply system, an increase plc analog input modules have a power beyond. With the extensive use of semiconductor technology, packaging technology and high-frequency soft switching, power supply module power density increases, more and more high conversion efficiency, applications are increasingly simple.
plc analog input modules in switching power supply technology in the field of people are related to the development of power electronic devices side, while the development of the switching frequency technology, the two promote each other to promote the switching power supply to more than two-digit annual growth rates toward the light, small, thin, low noise , high reliability, interference direction. Switching power supply can be divided into AC / DC and DC / DC two categories, DC / DC converters are now modular and design techniques and manufacturing processes are mature and standardized at home and abroad, and has been recognized by users, but AC / DC modular, makes  plc high-speed counting module its own characteristics in the modular process, encountered more complex technology and manufacturing process problems. plc analog input modules, respectively, the following two types of switching power supplies for the structure and characteristics in order to elaborate
DC / DC converter is a fixed DC voltage into a variable DC voltage, also known as a DC chopper. Chopper work in two ways, first pulse width modulation Ts constant change ton (GM), the second is the frequency modulation (1) Buck circuit - Buck chopper, the average voltage output
U0 is smaller than the input voltage Ui, the same polarity. 2) Boost Circuit - boost chopper, the output voltage U0 is greater  Programmable Input Module than the average input voltage Ui, the same polarity (3) Buck-Boost circuit - buck or boost chopper output voltage U0 is greater than or less than the average the input voltage Ui, the opposite polarity, the inductor transmission (4) Cuk circuit - buck or boost chopper, the average output voltage is greater than or less than the input voltage U0 Ui, of opposite polarity, capacitance of the transmission. There Sepic, Zeta circuits. The above non-isolated circuit, the circuit has a forward isolated circuits, flyback, half-bridge circuit, full bridge circuit, push-pull circuit.

2014年4月27日星期日

Major developments plc analog input modules

With the development of science and technology, the reliability of a redundant PLC system has been further improved, the current PLC redundancy can be divided into hardware redundancy and software redundancy in two ways, hardware redundancy connection differently, but also requires that the corresponding hardware model, but no special software is required. Because of the higher hardware redundancy with high reliability, but also higher cost to build the system. And software redundancy is a low cost solution while also greatly  plc cpu module improved the reliability of space applications, plc analog input modules can be widely used in metallurgy, transportation, electricity, chemicals, sewage treatment, etc., but the system still needs to be Research. Here's a brief introduction to the way these two redundant PLC system.
Software redundancy principle is that when the process of the realization of the two CPU while the system is running up and running, but in normal operation only the main CPU to issue control commands, and the standby CPU to detect and record the main CPU status issued by the main CPU command, plc analog input When the main CPU modules can be sustained at the time  plc analog output module of the failure of the state to take over the main CPU to issue actually execute the command. When specific fault occurs, the system can achieve standby switch, standby master station continues to run to succeed.
Hardware redundancy redundant system to ensure reliability of the system, such as all the major components are redundant configurations, including a redundant CPU, power supply module and the synchronization module for redundant CPU communication. Customers can also be configured accordingly redundant servers, redundant interface module, redundant communications media, etc. according to specific needs. Under normal circumstances high-speed counter modules  hardware redundancy system can achieve the following functions.
A positioning error detection and error integration.
2 automatic event synchronization with smooth master-slave switch.
3 is similar to a standard CPU-line programming.
4 can be modified during operation of the system or components to be replaced.
5 Download the program when considering only a single CPU, the program can automatically copied to another CPU, and the automatic re-enter after the repair.

2014年4月17日星期四

plc analog io modules management techniques

Reduce the demand for efficient power people and the size of electronic products, promote the development of digital power technology and power management technology. Modern power management semiconductors have been more associated with the power switch control circuit protection and integrated, plc analog io modules to reduce power management devices in the  digital input plc circuit board footprint and achieve the protection, control and fault monitoring functions combinations. Evolving the same time, digital power management ICs satisfied only detected voltage, current, temperature and other parameters, and gradually developed into an integrated digital PWM control, ADC and communication functions, and is moving towards becoming a complete power system on chip direction .
A digital plc analog io modules and  output module plc application management technology introduction
Generation IC requires 3.3 V, 1.8 V or lower supply voltage, the device requires multiple single voltage supply and the demand for a large electric current, the voltage must be applied to the device with the correct timing. Voltage power supply for these devices must be on the circuit board (preferably from these devices near the place) to produce, so that a minimum pressure drop and voltage stability. High-performance DC / DC converters for a wide range of input, either as isolated power, but also as a non-isolated point of load converters. Thus, most board power supply system has been high-speed counter plc  used DC / DC converter as a power supply module body. However, if the lack of power management circuits, you can not build a complete, robust power system. Content includes power management: Power system monitoring, sequencing and tracking, monitoring and fail-safe. Power management devices at the input common-mode rejection handling, start limit, starting and control off, and even power factor correction and other functions. Configuration at the output of the power management device control startup sequencing and output voltage regulation, and for the over-voltage, over-current conditions fail to provide appropriate protection. All relevant requirements and functional circuits are isolated from the main circuit.

2014年4月15日星期二

plc analog input modules functional parameter index and test methods

Electrical performance of the power module is presented through a series of tests , the following general functional test project , as detailed below :
First, the definition of the power supply regulation regulation of its ability to provide a stable output voltage when the input power supply voltage variations. Test procedure is as follows : the power supply in the test engine after heat stable under normal input voltage and load conditions , respectively, in a low input voltage (Min), the normal input voltage (Normal), and high input voltage (Max) and record the measured The output voltage value. Power adjustment rate is usually fixed to a normal load (Nominal Load) , the percentage change caused by the input voltage output voltage deviation  micro smart plc (deviation) , as shown in the following formula : Define two , load regulation Load regulation is switching power supply when the output load current changes, its ability to provide a stable output voltage . Test procedure is as follows : plc analog input modules in the power supply to the test input voltage under normal load conditions and the stability of the heat engine , the measured value of the normal output voltage under load , and then were light load (Min), overload (Max) Load Next , measure and record the output voltage value ( respectively Vo (max) and Vo (min)), load regulation is usually normal fixed input voltage, load current changes caused by the output voltage deviation rate percentage , as the following equation: Third , the definition of a comprehensive regulation for the comprehensive regulation of the power supply to the input voltage and output load current changes, its ability to provide a stable output voltage . This is a comprehensive line regulation and load regulation , and this test system for the synthesis power regulation and load regulation , which provides for the power supply to changes in input voltage and load conditions more accurate performance verification . Comprehensive regulation in  industrial automation plc the following ways: on input voltage and output load current changes , the output voltage deviation shall be within the range specified above the lower voltage ( ie, less than the absolute value of the output voltage above the lower limit ) or as a percentage of the boundaries four , plc analog input modules output noise output noise (PARD) refers to the input voltage and output load current are constant , periodic and random deviation of the average DC output voltage of the voltage. Output noise is after all the unwanted part exchanges and noise on the regulator and filtered DC output voltage ( 50/60Hz power frequency signal containing the low-frequency , high frequency above 20 KHz switching signal and its harmonic wave, and then the other of the  plc analog io module composition and the random signal ) ) , usually mVp-p is a peak-to -peak voltage is expressed in units . General specifications are output switching power supply DC output voltage of less than 1% of output noise specification , the bandwidth of 20Hz to 20MHz. The actual work when the power is the worst situation ( such as maximum output load current , input supply voltage minimum , etc. )

2014年4月14日星期一

plc analog output modules in the AC / DC conversion simple analysis

AC / DC conversion is to convert AC to DC , the power flow may be bidirectional power flow from the power source to the load is called a " rectifier " power flow from the load to return the power referred to as " active inverter ." AC / DC converter input is AC 50/60Hz , because to be  industrial automation plc rectified , filtered , and therefore relatively large size of the filter capacitor is essential, because while experiencing safety standards (such as UL, CCEE , etc. ) and EMC Directive restrictions ( such as IEC,, FCC, CSA), AC input side EMC filter must be added to meet safety standards and the use of components , thus limiting AC / DC power supply volume of miniaturization, in addition , due to the internal high-frequency , high-voltage , large plc module  current switching action, making solve EMC problems more difficult , plc analog output modules also installed on the internal high -density circuit design made ​​high demands, for the same reason , high voltage, high current switching power supply makes the job losses increase large , plc analog output modules limits the AC / DC converter modular process, and therefore must be used to optimize power system design approach to make it work efficiently to achieve a certain level of satisfaction .
AC / DC conversion circuit according to the  plc programmable intelligent controller connection method can be divided into half-wave circuit, a full-wave circuit . Press the power phases can be divided into single-phase , three-phase , multi-phase . Operation of the circuit can be divided into quadrants by a quadrant , two quadrant , three quadrants, four quadrants.

plc analog input modules of the main features of some other

In the industrial production process, a large amount of sequence control switch, which follow a logical sequence of actions conditions and controlled chain protection action in accordance with the logic, and a large number of discrete data collection. Traditionally, these functions plc communication modules  are controlled by pneumatic or electrical system to achieve the second year, based on the control unit integrated circuits and electronic technology, for the first time using procedural methods used in electrical control, this is the first generation of programmable logic controller , called Programmable ontroller (PC). After a personal computer (the PC) to develop, for convenience, but also to reflect the features of programmable controllers, programmable logic controller named Programmable Logic Controller (PLC).
Growth rate has been maintained at 30 to 40%. During this period, PLC analog processing capacity, number-crunching, man-machine  plc sequence of events recording module interface capabilities and network capacity has been greatly improved, PLC gradually entering the field of process control, replaced in some applications in the field of process control in a dominant DCS systems. PLC has the versatility, ease of use, wide adaptation, high reliability, strong anti-jamming capability, programming and simple. PLC in the industrial automation and control especially in order to control the position, in the foreseeable future, can not be replaced.

2014年4月10日星期四

plc analog output modules main advantages

Analog input / output modules for handling automation system analog input / output tasks. Analog sensors and actuators can be connected to the automation system via these modules.
Use analog input / output modules to provide users with the following advantages:
Best Adaptability:
Through the appropriate module combination , plc analog output modules can adjust the input / output points according to specific  plc cpu module tasks. Saving unnecessary costs.
Powerful analog processing technology :
A variety of input / output range and a variety of high-precision allows the connection of analog sensors and actuators. Analog input module has the following mechanical properties :
Compact design
Rugged plastic enclosure inside include :
The red LED indicates a fault group
Front connector plug options, mounted behind the front door and get protection.
Label area on the front door .
Connector pin assignment , plc analog output modules for wiring inside the front door .
Easy installation
Modules are mounted on a DIN rail and  plc sequence of events recording module connected to adjacent modules through the bus connector. No slot rules ; enter an address determined by the slot.
When used in the ET 200M distributed I / O system with active bus modules can be digital input / output module is hot-swappable , without any response. Other modules continue to work .
User wiring
Device unit connected via the front connector. When the first connection module, the coding device is locked in the connector such Programmable Output Module  that the connector can only be adapted to the same type of module . When replacing the module of the same type for the new module can be kept intact state before wiring connector. This avoids the process of replacing the module will be pre- wired connector into the wrong module.

2014年4月9日星期三

plc analog input modules connected to 4G FAQ

The next Windows environment: an installation module antenna connected, plug in China Mobile 4G USIM card;
2 the other end of the USB cable into the computer's USB port, turn on the power switch, when lit, representatives have power. This plc program logic controller  time the computer will prompt the discovery of new hardware when the PC driver is not installed, see the "Device Manager" in the "Other Devices", you can see a yellow question mark ports;
3.plc analog input modules driven double-click driver installation, the driver is installed, the "Device Manager" in the "Port" column can be seen out of the virtual serial port;
4 After installing the driver, you can open the programmable logic control plc  serial port testing tool, select "Connect - open the serial port" drop-down list to select any one of the serial port can be tested;
5.plc analog input modules input "AT + CFUN = 1", press the Enter key, this instruction is the role of software boot correctly returns "+ CEREG: 1" indicates a successful boot;
6 Enter the "AT ^ DSTMEX = 1,7", press the Enter key, the role of this instruction is to set up a network of only 4G network registration, return "OK" indicates the setting is successful;
7 Enter "? AT + COPS", press the Enter key, the plc programmable controller  role of this instruction is to query the network registration status, when the return "+ COPS: 0,0," CHINA MOBILE ", 7", said registered to the 4G network;
8 Enter "AT + CGDATA =" M-0000 ", 1", press the Enter key, the role of the directive is to activate data services, when the return "CONNECT" after the description has been successfully activated 4G network, then your pc machine you can access it.

plc analog input modules which modules are composed mainly of

When deposited from the programming input to the user program memory and CPU system according to the function given by (system program memory compiler interpretation), translating into an internal PLC user program recognized by the users compiler.
Wang: plc analog input modules input state and input information from the input interface input, CPU will be credited to the work  industrial automation plc of the input image data memory or register. Then the data from the CPU and procedures together organically. The result is stored in the output image register or working data memory, and then output to the output interface, control external drive.
Composition: CPU by the controller, operator and register. These circuits are integrated on a single chip. CPU through the address bus, data bus and I / O interface circuit is connected. Semiconductor memory circuit with memory function. Into the system program memory and user memory.
System program memory to store the system procedures, including management procedures, monitoring programs, and to explain to the user program to do the compiler to compile process. Read only memory, ROM components. Manufacturers use the content can not be changed, power does not disappear.
User memory: User program memory is divided into data storage and work area. A random access memory (RAM) components. User. Power content disappears. Common efficient lithium batteries as a backup power plc intelligent controller  source, life is generally 3-5 years. Input / output interface
(1) plc analog input modules input interface: optocoupler consists of two LED and phototransistor extreme tube components.
LEDs: at the input of the optocoupler changes with an electrical signal, the light emitting diodes generates the same variation of the input signal is an optical signal.
Optical three tubes: In conducting the irradiation light signal, and the degree of conduction on the strength of the optical signal. In the linear operating region optocoupler output signal and the input signal has a linear relationship.
Input interface circuit works: When the switch is closed, plc analog input modules emitting diodes, and transistors under  plc controller manufacturer irradiation of light is turned on, the internal circuitry of the input signal. When the switch is off, the diode does not light, the transistor is not conducting. The input signal to the internal circuit. That is, through the input interface circuit of the external switching signal into the PLC can accept digital signals. (2) operation of a relay output circuit outputs the PLC: when the internal circuit outputs a digital signal, a current flows through the relay coil current, and the normally open contact is closed, the load is turned on to provide current and voltage. When the internal circuit outputs a digital signal 0, no current flows through the relay coil without current, and the normally open contacts open, the load current or voltage is off. That is, through the output interface circuit into the internal digital circuitry, or a signaling operation of the load does not operate.

2014年4月3日星期四

some introductory plc analog input modules supply identified

plc analog input modules is not equal to the number of inductive power supply circuit relative to the number depends on the power supply circuit with the corresponding control chip , like a lot of looks like a 6 or 8-phase loop powered with eight large inductor placed there , in fact, really 4 +2 or 4 +4 phase .
As for the seemingly Bluff actually do not plc programmable controller  practice special programs , because it's like hyper-threading as other conditions , like dual nuclear power plant thread certainly not four nuclear power plant thread is strong, but plc analog input modules will be stronger than the dual-core double thread ; same 4 +4 phase power but not as authentic eight- phase loop will come stronger than pure four-phase circuits.
As to why there will be " inductive loop number is  programmable plc the number of power " such a statement, in fact, is not high because the previous CPU -power motherboard power supply circuit is really so little time , but is now coming out of the 24 -phase power supply board , if you really 24 -phase power supply in accordance with the purely physical , and that as a direct digital powering up.
Now the number is three or four inductors can be judged as a three-phase or four-phase loop-powered , but if eight or even double plc sequence of events module  digits , then the official website or directly query the data more reliable .
To answer your case, right is left is the memory expansion slot , 3-phase power supply should not run. But see how many MOSFET , watching looks like a two -phase loop one last look MOSFET, this circuit withstand the current pressure is not recommended or not considered a high- power processor .

2014年4月2日星期三

plc analog io modules and how to convert digital

The concept is relative to the analog digital (switch) is, the digital signal is a signal that the signal is only two states 0 and 1, such as our trip switch button.
Is a discrete analog signals, plc analog io modules Analog data within a certain range, Ken can be any value, such as pressure, temperature, flow rate can be either a voltage can be 0.1 0.12 etc. When we deal plc sequence of events module  with such signals, with analog modules! Equipment such as temperature and humidity into analog signals need to use analog modules, analog module includes voltage, current, RTD, thermocouple module may cause the input signal voltage value of less, depending on your 0 - 10v with a  Programmable Input Module load capacity of how kind, because this time the input impedance of 250 ohms, then the maximum current can reach 40MA, the voltage signals are generally not such a big load capacity, in fact, the current input is converted to 4-20ma to 1 - 5v voltage before making A / D conversion. If the 0-10v enough to do with a load capacity may exceed the input limit, unless your plc modules are set in accordance with 0-10. Here is not required for transformation, when entering plc analog input module via analog, through conversion (programming calculation), the corresponding temperature value, then according to pulse input module plc  your set of 100 degrees Celsius to compare the size (programming), when greater than 100 degrees, plc control output IO module enables equipment downtime too, of course, out of the signal may be digital. Because just a simple switch, very simple.

2014年3月31日星期一

plc analog output modules has a broad development

At present, the development of embedded PLC is also diversified , domestic core a few years ago there Huazhong Science and Technology chipset embedded PLC system software is loaded , as the hardware platform , the plc input output modules  development of multi-mode embedded PLC into the channel ; there is a development path is the development of PLC and HMI combination of hardware / software integration for the target platform , taking advantage of CASE tools, combined with various types of embedded chip development platform and a variety of input / output channel hardware circuit libraries, designed  for electrical and mechanical equipment developed customized, ODM nature has dedicated PLC.
Embedded PLC has a broader space for development in our country , plc analog output modules first is that it is very beneficial to the development of China's two major characteristics play automation plc modular  industry : There is a very strong market for the electrical and mechanical equipment for the foundation , and has enough value for money the world's best design and development team . We can at the lowest cost , high quality, according to custom requirements of the design , production and electromechanical equipment for embedded PLC, instead of the generic PLC. Meanwhile, the various aspects of functional embedded PLC hardware , software, human-machine interface , communications, design flexible, easy to cut , closer to the requirements of modular plc  various grades of electrical and mechanical equipment . Embedded PLC technology based entirely on the basis of embedded systems can be used with . SoC chip , embedded operating systems and programming languages ​​according to IEC 61131-3 standard programming environment and other advantages, making it very easy to find on the market

2014年3月30日星期日

The analog input module is configured to output module plc precautions when

First, we must get to know what is the "two-wire current signal" input, what is the "four-wire current signal" input. Simply put: When the sensor comes with power supply, transport a 0 ~ 20mA or 4 ~ 20mA current loop signal through two current signal line out without PLC via analog interfaces to  plc temperature control module provide 24VDC power supply module, the We call it "four-wire current signal." At this point, output module plc should the current loop input analog signal on the channel configuration is 4DU (4 ~ 20mA), the analog input module configured to span the card position [C] when the sensor itself, without power supply, you need to PLC analog input module to provide external power supply 24VDC when we called "two-wire current signal." Under the "two-wire current signal" configuration, analog input module current and voltage signals are shared two lines. In this case, the plc modular  current loop input analog signal on the channel configuration is 2DU (4 ~ 20mA), the analog input module configured to span the card position [D], as shown above: The above two configurations, the actual do not be mistaken in!
If configuration errors, such as the "active" four-wire current input signal is mistakenly configured as "passive" two-wire current input signal, the analog signal input interface PLC will withstand external 24VDC input current signal is brought power supply, which can easily lead to plc logic controller  burnout PLC analog input module! ! ! In practical applications, to be careful, pay attention to the difference between them

2014年3月28日星期五

Some simple introduction plc analog input modules for

In our application of PLC, covering almost all brands of the world, showing the  plc analog io module trend of the Boxer Rebellion, but the industry points, have their own sphere of influence. Medium and large centralized control system uses PLC mostly small control systems, machine tools, equipment automation and OEM products monomer used in Japan PLC majority. plc analog input modulesPLC has advantages in networking and software, and PLC in terms of flexibility and price advantage. Our PLC supply channels, mainly manufacturers, distributors (dealers), system integrators, OEM users, the end user. Among them, the most PLC is to reach end users through distributors and systems integrators.
Siemens in the Chinese market, the Chinese market is a traditional supplier plc cpu modules  of accounting had opportunities in many areas, the corresponding LG Schneider and although these fast-growing market newcomers, but there is still a gap distance pioneer. Some brands will focus on a number of industries, such as Schneider pay more attention to the power industry, metallurgical industry, Rockwell outstanding performance. In addition, domestic PLC brand  plc module developed quickly, and captured a certain market share.

plc analog input modules leveraging some of the industry's role in the Internet of Things

Development and construction of things to cover broader, PLC as the  analog output module current information collection, control of the main technical means, is bound to play a key role in the construction of things.
PLC is a major part of which is composed of automation equipment, industrial automation production with industrial Ethernet applications more widely, the production process but also the development of network information technology trends, PLC or by the large-scale application of networking technology of the machine again quickly development.
From the two-dimensional code spread to "smart city" landing, as were high hopes of emerging industries, four things are flowering, quietly affecting people's lives. Industry experts believe that things can plc digital input output module  improve economic efficiency on the one hand, significant cost savings; hand to provide technical momentum to global economic recovery. Currently, the U.S., the EU invested so heavily in-depth study to explore things. China is also highly concerned about the emphasis on research, the Ministry of Industry and Information Technology of Things will work with relevant departments to carry out research on a new generation of information technology, to form a new generation of policy measures to support the development of information technology. In the course of development of control technology, with computer technology, control technology, digital technology, communications technology and other high-tech network of closely related. Formal various plc cpu modules  emerging technologies, and promote the development of the programmable controller. Let PLC programmable controller to replace relay logic control become mainstream control technology. The basic mechanism of a power PLC, a central processing unit (CPU), memory, input and output circuits excuse functional module, communication module components. It works by the scanning technology implementation phase, the user program, the output refresh period of three parts.

In plc analog input modules to control the role played

Power systems using conventional crane relay - contactor control, but this control system has some drawbacks:
The first day, the need for a large number of loading and unloading  plc programmable logic controller operations, switching frequency, in the current state of the larger, easy to burn contacts; Second, poor reliability, complex operation, failure rate, energy waste and inefficiency.
Third, in order to adapt to the working conditions of crane, crane operator frequent repeated handling, high-current electrical components always in working condition, reducing the life of the electrical components and motors.
Fourth, the coordination of the work depends mainly on the crane operator's proficiency. When the crane operator labor intensity of work is relatively large, easy fatigue, prone to misuse.
Solve these problems, only to completely change the traditional control  plc power supply module methods fundamentally. In recent years, with the rapid development of computer technology and power electronics, electric drive and automatic control field is also changing. Among them, a representative of the PLC to obtain a wide range of applications in the crane control system provides favorable conditions.
In the PLC-controlled crane ready to set the speed according to the scene at work, time and deceleration time upshift; improve work efficiency, more accurate positioning; energy-saving effect is obvious, saving rate of 35%; gear, Motor shock, low failure rate, easy to maintain, greatly reducing maintenance role; improve the reliability and modular plc  safety of traffic, extending the life of the crane.

2014年3月27日星期四

plc analog input modules, What is a switch? What is Analog

Switch only two opposite working condition, such as high and low, the relay coil is energized and off, on and off an electric shock, plc analog input output io modulebe directly input and output switch signal. Some PLC (eg Siemens S7 series) will be called a digital switch. analog is continuously changing quantities such as voltage, temperature, pressure and speed, such as PLC, does not deal directly with analog, you need to enter the module a / D converter with analog unit, the analog to digitalconverter is proportional plc digital input output io moduleto the input signal. PLC in digital (such as the output of the PID controller) with analog output module requires the D / A converter to convert them into the corresponding figure proportional voltage or current for external actuators (such as electric control valve or drive) to use.