Double Point Status Alarms

Plant SCADA 2023 R2 now supports double point status alarms.

A double point status alarm responds to eight states in a field device that are represented in Plant SCADA as a single integer tag.

For each of the eight states you can specify the following:

• State Name <n> — a name that identifies the condition that the state represents.

• State Type <n> — the action that occurs when the device transitions to a defined state. The options are:

  • "Alarm" - an alarm is added to the Active Alarms page and an event is logged to the SOE page. The State Name will appear in the State field.

  • "Event" - indicates an OFF state has occurred. An event is logged on the SOE page, even if an alarm state transition did not occur. The State Name will appear in the State field.

  • "None" - indicates an OFF state has occurred. The State Name will appear in the State field on both the SOE and Active Alarm pages when an alarm transition occurs.

    Note: If an alarm is currently in an "Event" or "None" state, a further transition to a "None" state will not be reported.

This means when the value of the integer tag is 0, the alarm will go into "State Name 0". When the value of the tag is 1, it will go into "State Name 1", and so on. When this occurs, the associated State Type action will be triggered.

Just like time stamped analog and time stamped digital alarms, double point status alarms are timestamp based and designed to work with the Driver Runtime Interface (DRI). They need to use tags where values are pushed to the alarm server by a driver.

See Add a Double Point Status Alarm.