Plc analog input modules

PLC analog input module is part of the plc modular control system. Mainly responsible for receiving information field devices or control equipment, and signal level conversion, and then transfer the conversion result to the plc cpu program processing.
"PLC analog and communication control application practice" Mitsubishi FX2N PLC target models, introduced PLC in the analog control and communications control. In the analog control, highlight the Mitsubishi FX2N cpu module plc analog special module and PID control applications; communication control applications, focusing on the use of serial communication command RS were smart devices such as PLC and inverter communication control and communication program prepared by.

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.

Some analysts plc analog output modules in

Is the A / D module, right, and his function is to 4-20MA current signal

into digital, his task is complete, as the data also needs to become a PLC

program processing, computing, or does not make sense. Because of the PLC

CPU unit can not directly accept a current or plc controller suppliers  voltage signal, a digital

signal only recognize him, that the data in the PLC in full is the

existence of a binary 0 or 1, and A / D module is a bridge, is responsible

for the conversion. However, after the conversion  Nanda micro smart plc procedures also need to

become data you need. That unit is to grab the CPU A / D in the data

module to process, after the program operation to get useful data, this

data may be temperature, weight, pressure, and finally displayed on the

touch screen, the touch screen has a generally driver, which has the PLC

channel, you make a connection can be a variable, since the touch screen

itself is also quite a drive axle, PLC where each state corresponds touch

point in the channel, where the variables corresponding to the  touch the

channel, an association can then collect the data. If you use a computer,

using VB, VC and other programming will all  Nanda cpu module plc develop their own drive this

one, and this thing may become significant. This is the point with the

touch screen is good, do not have to write this newsletter, directly on

the line.

plc analog input modules and load power What is the difference

Restart the computer Cause Solution:
1, there may be a BIOS settings problem, restore the default settings into the BIOS or the motherboard battery out, Flip, discharge. Objective: To restore the default settings for the BIOS values, excluding the BIOS default automatic restart or shutdown cooling phenomenon.
2, the restart occurs before the restart occurs if the application software or download software to run the program, then restart the plc controller suppliers  software may be caused, in general the program to uninstall and re-install the software, if the fault persists, then the software itself is wrong, you can not to use.
3, anti-virus software in Safe Mode using viruses, troubleshooting if the restart, restart the failure is caused by a virus.
4, boot into safe mode by pressing F8 after the exit in normal mode. Also available system comes with System Restore feature to restore, if the restart troubleshooting, restart the system file damage is caused.
5, if the fault persists, then check the power supply, power quality is poor, aging or power is too small to meet the power needs of the various parts of a computer, high-quality power supply can be replaced, if troubleshooting is to restart the power failure caused.
6, a device restart when hot-plug if the computer going on, according to the first three resolved.
7, then use the process of elimination, check memory, video card, CPU, CPU fan, motherboard, etc.
8, check the memory, memory low quality, poor  Nanda industrial automation plc cooling, overclocking, different brands of memory mixed interpolation and CAS setting too low can cause the computer to restart, test method can be used to replace the memory, and memory in the BIOS parameters are adjusted accordingly .
9, check the motherboard, motherboard aging, capacitor failure or exploding, motherboard and chassis backplane can be caused by a short circuit, etc. reboot, you can remove the motherboard from the chassis to inspect or test, then check the CPU heatsink fan base silicone is dry, If dry, the CPU fan on silica gel to clean and re-coated with silicone to good. Then check the CPU fan rotation, and the CPU temperature is normal.
10, cleaning method: a host computer through the  Nanda cpu module plc dust components to be cleaned troubleshooting methods. Dust is also caused by one computer to automatically restart failed factors, dust can cause aging of components, pin oxidation, poor contact and short circuit faults. For dust caused by these failures, the general use of more effective cleaning method.

Some problems plc analog output modules in

Upper and lower limits of analog input values ​​are set to 20 and 0 , had everything normal, in the absence of the analog signal access , the software displays a value of 0 , there is signal Nanda plc digital input module  access , they also have a normal display, but under normal use two or three days , the upper and lower limits remain unchanged, the analog input value in the absence of wiring is 6.8 , all the channels I have tried are 6.8 , then the company gave me a new simulation input module , installed after the beginning is normal, but it is the same problem in a couple of days later , I ask an expert what causes ?
Also this PLC as well as a relay output module , 2, 3 and 4-channel connection of solenoid valves, found often there will be  Nanda micro smart plc a problem , sometimes when I start solenoid valve, status lights all of a sudden relay output modules are extinguished , the network does not pass , after a minute or so , PLC will automatically linked to the network, the solenoid valve to start this and what is the reason ? I have checked the wiring before , are not the problem
You said power module before Nanda modular plc  I checked, input 220V, power module output is 5.09V, I then adjust it to 5.01V, it should be no problem , there is nothing good advice.

plc analog io modules leveraging the rapid growth of the Internet of Things

The past two years by the domestic economic slowdown, sluggish economic recovery abroad, the market size of the PLC showed a sharp downward trend. Things develop guidance and related documents formally introduced this year, driven by the Internet of Things and smart grid, PLC industry will Nanda PLC programmable logic controller plc  rebound and achieve rapid growth.
Development and construction of things to cover broader, PLC as the 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  Nanda PLC micro smart plc 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. 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  Nanda PLC high-speed counter 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.

plc analog output modules products emerging in recent years introduced a number of application areas

( 1 ) In recent years , and Lee Mining PLC product innovation , its reliability, performance and other advantages have been widely recognized by users. And Lee mineral widely used in low voltage feed switch , high Nanda Power supply module plc voltage power distribution equipment , combination switch , load center and other products with PLC products are gradually replaced protectors and ordinary PLC microcontroller products , equipment and mine started when Lee became some of the PLC mining equipment and advantages of selling the company's products .
 ( 2 ) the use of PLC to develop a new type of solar thermal water heaters, solar water heaters can overcome the traditional presence affected by climate , temperature instability and other defects , but also focus on water supply for multiple users. Siemens S7-200 series PLC control operation of solar thermal water heaters with water temperature , water PLC Programmable Logic Controller  level and flow control corresponding temperature , level and flow sensors and PLC analog input extension implementation. Meanwhile , PLC and Siemens integrated text display T D400 achieve interactive interface for the collector water heater temperature and water level inside the real-time online display and settings.
 ( 3 ) With the development and social progress of science and technology, automatic doors in everyday life has also been widely used. Automatic door systems in the past generally use logic control module , due to the high failure rate , low reliability , convenient maintenance and other reasons, will be phased out . Used Mitsubishi PLC automatic door control system as a controller to a transmitter and a receiver of ultrasonic switch photoelectric switch as an input device of the system, two different sensor input control signal to the PLC, the PLC system using code tables , I / O allocation table and automatic door control actions such as the implementation process in order to achieve control of the door open or closed ( rising or falling ) .

PLC analog input modules open forum

PLC is one of the most important factory automation control devices , with a wide range of applications in the factory. As technology advances , PLC has been out of the " logic control ," the simple scope , PLC has more analog-digital conversion , digital to analog conversion, high-speed counting , speed control , position control, axis positioning control, temperature control, PID control , telecommunications and high-level language programming and other functions.
Due to historical reasons, the development of technology , the traditional PLC products is still relatively closed . But in the mutual PLC Programmable Logic Controller  exchange of information on real-time , deepening liquidity requirements today , PLC control to continue to adapt to the needs of the plant , openness trend has become increasingly evident. With the continuous opening of the PLC , which has a much richer functionality . This month we will be more open to discuss the development of PLC functions .
Open open trend has emerged PLC is inevitable , closed PLC will give users a great deal of inconvenience. For example, the need to expand a factory or during use and the introduction of a number of other manufacturers of equipment , PLC because each vendor uses a different means of communication, can not communicate with each other , it will cause the new system is not compatible with the original system . Siemens have noticed several years ago this problem and focus on the promotion of Totally Integrated Automation (TIA) concept , with the PROFIBUS fieldbus technology to facilitate communication with higher performance PLC . Open PLC is inevitable . Judging from the current development of automation , overall system performance is more important in the processing equipment , which makes people pay more attention with the performance PLC and peripheral devices , the protagonist of the status of the PLC has been gradually fading. Effectively carry PLC and peripheral devices communicate , not only for the input , output , analog , etc., also includes servo , scanning and intelligent instruments and so there will be more demand . Now  Nanda Power supply module plc users in many applications the choice of the PLC are no longer considered too technical degree , but the question of which brand to choose from. These are important reasons to promote the PLC open. The current situation on the market trend also proved PLC openness . Although the major PLC manufacturers according to their respective surfaces are still ways to promote the production of PLC, but if you observe carefully , all manufacturers have been from a different perspective on the function of the open PLC made ​​improvements . Many types of PLC can communicate using a specific method , the Internet .
But we should also be aware that , although we are in the efforts to open , but may be due to the open deep meaning , so that there is no guarantee that he would dare the PLC is truly open .

a brief introduction plc analog output modules in

You say that your sensor with analog output , analog input , ( meaning the module is to convert your voltage or current value to digital, then you can calculate the slope of the current form of the temperature or pressure . )
If you are asked to read the temperature or pressure PLC Plc controller manufacturers  values ​​, you must sensors with analog outputs and analog outputs. So you buy a simulation module , connect the analog module with PLC, analog output and input sensor is connected with the module ( module wiring diagram of course you do not have to worry about this ) . When the pass on the power after the current value of the module automatically detects the sensor and then convert it to digital, you calculate a formula based on its slope slope table , so you can know the current value of the temperature or pressure .
If so then what is the analog output module output ? Is a need to convert digital or specific value or quantity of modules and digital output is the same as an electric signal ?
The same output is a voltage or current signal wiring PLC Plc logic controllers  relationship with you , then the output current is the current line , then the line voltage is the output voltage. Temperature can be equipped with PT100, if needed pressure with pressure transmitter (4-20mA output ) , then select the range to be based on the meter .
What is the analog of the PLC are the same, as long as the project based on the amount of data can be transformed .
In addition , many of the instruments have a communication function or frequency output, which could save an AD module connection is also convenient.