Unable to learn McQuay device objects on a MSTP network under an ENC/UNC.

Issue

Unable to learn McQuay device objects on a MSTP network under an ENC/UNC.

Product Line

TAC I/A Series

Environment

Niagara R2

Niagara G3

Cause

McQuay APDU defaults to a length of 1476 bytes.  This length needs to be lower for an MSTP network.  McQuay has identified this problem in firmware 8.14.

Resolution

Contact McQuay to install new firmware with an APDU length of 480 bytes.