TonyWI
What com port is your pump connected to? It it connected to COM PORT RS485-A (J5) on the Mother Card?
Is there anything else connected to that Com Port?
Can you ensure that your pump is connected as illustrated below?
I see you have a SWCG. Is that connected to Com Port RS485-B (J4)?
r.

Pump is on J5, SWG cable is wired to J4 but not connected yet, but it will be Thursday. Hmm. Maybe I need to see what happens when I disconnect the SWG com port, or even switch the pump around.