Schneider Altivar 320 wiring / setup help needed

[Neale]

I have been having a look at the relevant manuals. Good news is that the BOB and the VFD inputs are compatible and you do not need any additional power supply. The installation manual, p48 in the copy I found, shows that there is a switch which will let you do this. See "Sink position using the output power supply for the digital inputs". The BOB outputs have a voltage and current rating that should be fine. Set the switch as shown in the diagram, and connect e.g. BOB pin 26 (output 1, LPT port 17) to the appropriate VFD DI pin.

Next job is to configure (or check) that the VFD DI pins are correctly set up. The pins are programmable - see Programming Manual p125 onwards. You should start by checking how these are currently set but I would guess that from the factory a couple of these pins are set to For and Rev by default. You will need to check the manual to find out how to read a parameter and then modify it if needed.

That's a start - I'm afraid that I don't have time to read the manual in great detail but I hope that that points you in the right direction. Overall, it looks as if everything should work fine once you have the correct pins connected and the VFD configured.

Good luck!