Inhibit alarms through the Alarm Summary

When the system generates an alarm for an analog, a rate, tank, or a flowTotalConfig point, you can directly inhibit the alarm on the Alarm Summary window.

In the following procedure, an analog point is used as an example. The procedure is the same for rate, tank, and flowTotalConfig points.

To inhibit alarms on the Alarm Summary window

1. On the Navigation Menu, select System Displays > Alarms.

   The Alarm Summary window opens.

   

2. Select anywhere in the row of the alarm of interest.

   Note: Do not select the row header of the alarm.

   The Alarm Control dialog box opens.

   

3. Select Inhibit Alarms.

   The Alarm Inhibit dialog box opens.

   

4. Do the following:

   1. In the Alarm Inhibits section, select any alarms you want to inhibit.

   2. In the State Alarm Inhibits section, select any state-based alarms you want to inhibit.

   3. In the Inhibit Time field, enter over the existing inhibit time with the desired number of days, hours, and/or minutes.

      Notes: The entry "00:00:00" inhibits alarms indefinitely.
      
      As mentioned above, the length of time cannot exceed the global maximum duration inhibit time as configured by an Administrator.

   4. (Optional) In the Expiry Warning Time field, replace the existing time with the desired number of days, hours, and/or minutes.

      Note: The Expiry Warning Time must be smaller than the Inhibit Time.

   5. (Optional) Describe the Reason for inhibiting alarms on the point.

   6. Select Submit Operator Inhibit.

   The following occurs:

   • The Secondtimer starts counting down from the time indicated in the Inhibit Time field.

   • Any alarms that occur during the inhibit period do not appear in the Alarm Summary window.

   • If you entered a Reason for the alarm inhibit, the system creates a Control Room Management (CRM) note with the headline "Alarm Operator Inhibited". For further information, refer to the AVEVA Enterprise SCADA HMI Controller documentation.

   • The following occurs on the Alarm Inhibit dialog box for the point:

     • The Inhibit Time Left field updates every 15 seconds with the time remaining until the period of alarm inhibition ends.

     • Both the Alarm Inhibits and State Alarm Inhibits sections become unavailable.

     • Both the Inhibit Time field and Submit Operator Inhibit become unavailable.

     • The system selects the Operator Timed Inhibit checkbox.

       

       If you specified an Expiry Warning Time, a system alarm appears in the Alarm Summary window at the configured time notifying you about the pending inhibit expiry.

       Note: System alarms are only visible in an easy eXtended Operator Station (ezXOS) configured for receiving system alarms.

       When the Secondtimer expires, the following occurs:

   • Any previously inhibited alarm now appears in the Alarm Summary window, provided the point has not since returned to a normal state.

   • The following message appears on the Alarm Summary window: "Manual override period expired".

   • The following occurs on the Alarm Inhibit dialog box for the point:

     • Both the Inhibit Time field and Submit Operator Inhibit become available.

     • The Inhibit Time Left field displays the text "Unlimited".

     • Both the Alarm Inhibits and State Alarm Inhibits sections become available.

     • The time in the Inhibit Time field reverts to the default inhibit time as configured by an Administrator.

     • The system clears the Operator Timed Inhibit checkbox.

5. To stop inhibiting alarms when the inhibit is in effect, clear the Operator Timed Inhibit checkbox.

   • The following occurs on the Alarm Inhibit dialog box for the point:

     • Both the Inhibit Time field and Submit Operator Inhibit become available.

     • The Inhibit Time Left field displays the text "Unlimited".

     • Both the Alarm Inhibits and State Alarm Inhibits sections become available.

     • The time in the Inhibit Time field reverts to the default inhibit time as configured by an Administrator.