​.AlarmROC dotfield

Indicates when a rate-of-change alarm condition becomes active for the specified tag or alarm group. The default value is 0. When a rate-of-change alarm condition exists for the specified tag, it is set to a value of 1. The value remains 1 until the rate-of-change alarm condition no longer exists.

If the specified tag is the name of an alarm group, the .AlarmROC dotfield is set to 1 if any of the tags within the group are in a rate-of-change alarm state.

Category

Alarms

Usage

TagName.AlarmROC

Parameter

TagName

Any integer, real, indirect analog tag, or alarm group.

Data Type

Discrete (read-only)

Valid Values

0 or 1

Example

The following statement verifies if Tag1 has an active rate-of-change alarm associated with it:

IF (Tag1.AlarmROC == 1) THEN

The body of this IF-THEN statement would be processed if there were active rate-of-change alarms within the alarm group named PumpStation.

IF (PumpStation.AlarmROC == 1) THEN

MyAlarmMessage="The pumping station currently has an ALARM!";

ENDIF;

This dotfield is not linked to the .Ack or .UnAck dotfield. Therefore, even when an active rate-of-change alarm has been acknowledged, this dotfield remains equal to 1.

See Also

.Ack, .AckROC, .Alarm, .AlarmROCEnabled, .AlarmROCDisabled