Shore Power Loss Alarm on Quattro

Anyone have a suggestion on how to program a shore power loss alarm on the VRM portal that does not trigger when the generator turns off? IE an alarm for AC IN 1 only and not AC IN 2. The relevant alarm rules apply across AC IN 1 and AC IN 2 together. I could use a relay and the digital inputs of course, just trying to avoid extra hardware. I was thinking I could use node red to trigger a relay wired to a digital input but on the install in question both relays are being used.