Tag: Siemens PLC

Siemens PLC S7-200 and computer communication connection

~ arcozhang ~ Leave a comment

I use the same computer with the same data cable to connect with the PLC, and the PLC224CN PLC connection is normal, why not communicate with a CPU224XP PLC!？

 

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Connect to the computer to set the port. May be USB, maybe COM 2, COM3

Siemens PLC S7-200 is not connected to computer communication:

1, check if the computer has RS232 interface, the programming line and interface are not damaged
Is the USB driver installed and the port set correctly?

2, check if the USB is damaged

3. If there is no problem above, it may be that the communication frequency of the last time the program was written, and the communication frequency of this write is not the same as the communication frequency. At this time, we must use Siemens 5161 card to unlock, reset the communication frequency.

4, if there is still a problem, that is, the communication port of the PLC is damaged.