Shulou(Shulou.com)06/01 Report--

Editor to share with you what PLC analog input and digital input means. I hope you will get something after reading this article. Let's discuss it together.

Digital signal input and output: the switch is closed and disconnected.

Analog input and output: it is a numerical value. For example, the liquid level is 1.5 meters and the temperature is 30 degrees.

Input unit

The input unit is the input interface between the PLC and the controlled equipment, and it is the bridge for the signal to enter the PLC. Its function is to receive the signal from the main command element and the detection element. The types of input are DC input, AC input, AC / DC input.

Output unit

The output unit is also the connection component between the PLC and the controlled device, its function is to transmit the output signal of the PLC to the controlled device, that is, the weak current signal sent by the central processing unit is converted into a level signal to drive the executive component of the controlled device. The types of output are relay output, transistor output and gate output.

Extended data:

How PLC works

When the programmable logic controller is put into operation, its working process is generally divided into three stages, namely, input sampling, user program execution and output refresh. The completion of the above three phases is called a scanning cycle. During the whole operation, the CPU of the programmable logic controller repeats the above three stages at a certain scanning speed.

After reading this article, I believe you have a certain understanding of "what is the meaning of PLC analog input and digital input". If you want to know more related knowledge, welcome to follow the industry information channel, thank you for reading!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.