Niagara R2/DMS Integration – Re-learn Fails After Point Deletion

[Product_Support]

Issue

In a Niagara R2/DMS integration, the re-learn of the DMS database fails after some points were deleted in the DMS system.

Product Line

TAC IA Series

Environment

• Niagara R2 (all versions)
• DMS (all versions)

Cause

The DMS driver uses the LOGPT index (1–250) to scan points during the learn process. When points are missing, the DMS panel returns “NOPOINT.” If multiple consecutive “NOPOINT” responses occur, the learn process terminates early. This happens when points have been deleted or re-created, causing gaps in LOGPT assignments.

Resolution

Adjust the learnNoPointAbortCount property in the DMS driver:

• Set learnNoPointAbortCount to 250 to ensure all possible points are scanned, even if gaps exist.
• Note: This will increase the time required for the learn process but guarantees a complete scan.

Additional Notes:

• If the DMS database was reloaded from a saved backup, points will have consecutive LOGPT numbers, and gaps will not occur.
• Use this setting only when gaps are expected due to point deletion or creation.