node red istance to be interfaced to Mervis PLC
I have a stable Mervis environment with Neuron + several extension. I want use a dedicated node red instance on dedicated HW and finding a way to interface it with Mevis. There is way to read and write Mervis Global Varialbles trough Modus TCP/IP?
this is theoretically possible, but the easiest solution is to spin a ModbusTCP server in the Mervis and communicate over this protocol. The BACnet/IP would be easier to interface from the Node-RED, but we don't have any Node-RED nodes tested for this. The node-red-contrib-modbus works OK.
please follow this tutorial: https://kb.unipi.technology/en:sw:01-mervis:setting-modbus-server-hidden#setting_modbustcp_server_slave
now it's clear and working.