I tried to use this with relatively popular SIEMENS LOGO!8 PLC, with modbus-tcp server enabled. All works nice, when I add first modbus-tcp output node to Node-RED flow. When I add a second one, then ...
In addition, you can pass in a msg with one or more payload settings to initiate additional modbus read events. Most of the values are optional and server to override the defaults set in the nodes ...