How to realize communication between Siemens PLC master station (S7-300)+ slave station (S7-200)+HMI (Siemens touch screen)+inverter +PC? Touch screen and computer control at the same time

The model of the touch screen, the brand of the inverter and the protocol adopted were not stated, and no pictures were seen.

There are several ways to realize this scheme.

1, DP bus can be used for communication, 300PLC is the master station, and 224 of 200 is the slave station, but 224 needs to be equipped with EM277 expansion module. The upper computer adopts Wincc and S7-300PLC to realize DP communication. (The premise is that the 300 PLC has DP communication port, such as 3 15-2DP).

2. Re-establish equipment in WINCC, and communicate with eight 200 PLCs through PPI or Modbus protocol, provided that PLC has rich communication ports, such as 224xp.

As for Wincc on PC, it is necessary to add pictures and variables, and some programs need to be added in 200 or 300 PLC accordingly.

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