Issue
A Vykon Alarm Service (VAS) Client configured with limited access can view and acknowledge alarms but cannot delete acknowledged alarms from the Alarm History.
The VAS Client has been configured with low-level access for use at a security desk in a building. Only certain alarms are routed to this client and the user account assigned allows for the ability to view and acknowledge alarms. The Security Mask settings are illustrated below:
However, these settings do not allow for acknowledged alarms to be deleted from the VAS Client's Alarm History:
Product Line
TAC IA SeriesEnvironment
- Niagara R2 Enterprise Server
- Niagara R2 Vykon Alarm Service (VAS)
Cause
The VAS Client requires access to the entire alarm history database to delete acknowledged alarms. Limited Security Mask settings prevent this access.
Resolution
- Modify the Security Mask settings to grant access to the entire alarm history database.
- This change will route all alarms to the VAS Client, enabling the user to view, acknowledge, and delete any alarms.
- Important: There is no way to allow deletions without granting full alarm history access.
- If alarm deletions should be restricted to administrative users, restore the original Security Mask settings after performing necessary deletions.
