+ AA6YQ comments below
Dave, you note: “If the PW1 is connected to Commander's Secondary CAT port and no other device, then the only way CI-V collisions can occur is if the PW1 transmit CI-V messages.”
Are you saying definitively that the PW1 is never shutting up?
Could you can see this in an error log?
+ Yes, I should be able to do so. You should be able to see it in Commander's Messages window if you uncheck "Capture and display Primary CAT Port Messages" and check " Capture and display Secondary CAT Port Messages". The > and < characters to the immediate right of the timestamp will show whether Commander or the PW1 transmitted each message.
73,
Dave, AA6YQ