( 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
2014年2月28日星期五
2014年2月26日星期三
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 .
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 .
2014年2月25日星期二
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.
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.
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