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S7 protocol driver

This driver allows the communication between Simumatik and Siemens S7 protocol compatible PLCs.

Parameters

Aside from the common parameters described in the communication_driver docs, this driver includes:

  • ip: IP address of the PLC. Default = '192.168.0.1'
  • rack: Rack number of the CPU. Default = 0
  • slot: Slot number of the CPU. Default = 2

Setup data

The setup data will give values to the parameters required and will specify the I/O variables info.

{
    "parameters": {
        "ip": "192.168.1.23",
        "rack": 0,
        "slot": 2,
    },
    "variables": {
        "IB0": {
            "datatype": "byte", 
            "size": 1,
            "operation": "write"
        },
        "QB0": {
            "datatype": "byte", 
            "size": 1, 
            "operation": "read"
        },
        "IW0": {
            "datatype": "word", 
            "size": 1,
            "operation": "write"
        },
        "QW0": {
            "datatype": "word", 
            "size": 1, 
            "operation": "read"
        }
    }
}

Note

S7 Protocol uses the variable adress as variable name.

Note

The setup_params in the generic PLC components for S7_protocol will need the following format:

{"ip": "192.168.0.1", "rack": 0, "slot": 1}

Rack and slot

Select according to PLC type:

  • S7-300: Rack 0, slot 2
  • S7-400: Rack 0, slot 2 or from HWConfig
  • S7-1200/S71500: Rack 0, slot 1