The OrOr object in MNB controllers always reports that it is ON.

Issue

The OrOr object  in MNB controllers always reports that it is "ON".

Product Line

TAC I/A Series

Environment

WorkPlace Tech and I/A Series MNB BACnet controllers

Cause

Input to the OrOr object is inverted and has nothing attached to it.

When an "OR" input property of a logic object is inverted with nothing attached to it, the input will be seen as an "Off," resulting in an output of 100.

Resolution

If the input of an OrOr object is not connected in I/A Series BACnet controller, an "OR" input should not be inverted.   If another object outputting a "NA" is attached,  the "OR" input will function correctly.