Thanks Uwe,
I am now able to send commands to my scale (such as the zero out\tare command) successfully, I'm having a bit of trouble reading back from the scale, so for example, reading the qty from the scale. The command is received correctly by the scale and I can see the scale qty in the log of the agent in plant connector but unfortunatly it doesn't send the qty from the agent back into ECC.
I've started working on my own custom agent and command using your guide as a template so hopefully I'll get this sorted in the next day or two.
Thanks!
Colm