Versamax to PME conversion

I have a project I'm converting from Versapro software to PME on Versamax platform.

So far it looks smooth. I have no way to verify Modbus simulation from Versamax PLC. I can't seem to understand how the PLC talks to other devices via the modbus port. The logic and addresses are hard to follow.

Does anyone know how the devices correlate with the addresses or how the variables listed in Capture1.jpg are assigned to serial ID's. Maybe point me in the direction of where to look.

Here's the manual

Hey thanks Steve Bailey for the manual, that is helping me.