The number of input/output points of the PLC indicates how many input signals the PLC can receive from the outside and how many output signals it can send to the outside. It is actually the number of input/output terminals of the PLC. ..

PLC is a small industrial computer. If there is a problem with it, you must first rule out whether it is a problem with the PLC itself or a peripheral problem. If there is a problem with the PLC itself, the ERR light will often light up, or the red light will flash. Normally, the RUN light will turn green. , if this kind of problem occurs on the body, the probability of successful repair is not high.

Siemens PLC is one of the brands that many people often use, so today I would like to share with you how many ways to communicate with Siemens PLC when doing upper computer development