I was investigating hooking up Modbus devices to an AllenBradley PLC 5/40E using a Schneider Electric EGX100 Ethernet gateway.
I can access the web server on the gateway device and monitor the slave devices. However, I couldn't figure out how to write values to the devices.
I would assume that this configuration is useful for monitoring only but that would sort of defeat the purpose. Any idea what I'm doing wrong or resources that I could look through ??