Communication with PLC SIEMENS S7-200 over MODBUS
Posted: Sunday 04 June 2017 21:20
Hi, I want my Domoticz raspberry pi to work as a MODBUS MASTER.
This way I can send/receive commands to my PLC which works as a MODBUS SLAVE. The plc does not have any network cards, but the CPU 224 has a com0 port.
How should I connect the cable to my raspberry-pi?
Do I need additional hardware?
Which settings do I need to make in domiticz?
Have you got other tips/tricks?
Please advice
This way I can send/receive commands to my PLC which works as a MODBUS SLAVE. The plc does not have any network cards, but the CPU 224 has a com0 port.
How should I connect the cable to my raspberry-pi?
Do I need additional hardware?
Which settings do I need to make in domiticz?
Have you got other tips/tricks?
Please advice