Calling Modbus Techs. We are designing a new project and have an M340 PLC communicating over WIFI to a Modbus Gateway. We are using the Ethernet port on the BMX PS 2020 CPU. The Gateway has 2 modbus devices connected to it. I am reading the Holding Registers of each device through the READ_VAR FFB and can see all the registers fine. The problem we have is we need to control coils and read inputs from one of the devices. This device is Modbus RTU and requires the Modbus commands FC02 etc. Has anyone been able to get the M340 to be able to do this, or is this only a feature of the M580? Thanks
