PLCs & Industrial Controllers

Guides for connecting PLCs and industrial controllers such as Siemens SIMATIC S7, Allen-Bradley ControlLogix, and Beckhoff TwinCAT.

These guides describe how to read data from programmable logic controllers (PLCs) and industrial controllers and map it into an ISA-95 style MQTT topic hierarchy. The following guides are available:

Guide	Connector	Description
Siemens S7 Device	S7	Integrate SIMATIC S7 PLCs for industrial data exchange.
SIMATIC S7-1500 via S7+	S7+	Read data with symbolic addressing, including optimized data blocks.
Allen-Bradley ControlLogix PLC	EtherNet/IP	Read controller and program tags from a ControlLogix PLC.
Schneider Modicon M580 PLC	Modbus/TCP	Read located variables from a Modicon M580 PLC.
WAGO PFC200 Controller	Modbus/TCP	Map PLC variables to Modbus registers in CODESYS and read them.
Phoenix Contact PLCnext Controller	OPC UA	Read data through the built-in OPC UA server of the controller.
Beckhoff TwinCAT System	OPC UA	Read data from a TwinCAT 3 PLC through the TwinCAT OPC UA Server (TF6100).