What indicates a remote I/O module (MNB-1000-15) under an MNB-1000 is offline?

Issue

When a remote I/O modules goes offline the UNC or ENC will show an "NA" for the analog inputs but the BI's from a remote I/O module still show maintain their last value?

Product Line

TAC I/A Series

Environment

I/A Series BACnet

Cause

The BI's from a remote I/O module that is offline are going to an "NA" status if viewed from WorkPlace Tech.  At the UNC or ENC an "NA" received from a BI object will be interpreted as a "fault" and the object will show it's last value and turn orange to indicate it is in fault.

Resolution

When a Remote I/O module is off-line it's AI and BI outputs will show as NA in WorkPlace Tech.

At the UNC or ENC an "NA" received from a BI object will be interpreted as a "fault" and the object will show its last value and turn orange.  The BI can be set up to annunciate an alarm based on the fault condition in the UNC or ENC if necessary.