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:

Parameter	Default Value	Description
ip	192.168.0.1	IP address of the PLC.
rack	0	Rack number of the CPU.
slot	2	Slot number of the CPU.

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 address 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