FX9600 LLRP reader shutdown through GPIO


I've been working with LLRP on FX9600 and I'm able to do normal operations like inventory reading.

However, as my reader is going to work on a non-stable electrical environment I need to connect it to a 24VDC UPS.

The idea is when the input voltage falls to 0V (no input power from network), the UPS sends a signal to a GPI on the reader and then a controlled shutdown is performed.

Can anyone give some hints on how to use GPIO information on LLRP protocol and make a readers controlled shutdown?