We are monitoring Siemens s7-300 plc input and output with wiring raspberry Pi3 with nodered. But we just have limited I/O ports and wiring is not working very well actually.
I have seen somewhere, RPI 3 can receive directly all input and output from PLC with network connection.
Any way you know how can I do this and want to monitor it with nodered?
For example :
I0.1 = Brake
I1.1 = Emergency
Q0.0 = light on
Q0.1 = light off