Analog Alarms

Analog alarms are triggered when an analog variable changes beyond one or more specific limits. Each alarm can be configured as any combination of the following types.

• high and high high alarms - where the value reaches an atypical high
• low and low low alarms - where the value reaches an atypical low
• deviation alarm - where the values moves away from a predefined set point
• rate of change alarm - where a dramatic value change occurs within a specified period of time

The variables configured for an analog alarm are polled at the rate set by the Citect.ini parameter [Alarm]ScanTime. If an alarm state triggers, notification will occur the next time the variables are polled. Be aware that the time associated with the alarm state will represent the time the variable was polled, not the actual time the alarm condition occurred.

1. Choose Alarms | Analog Alarms. The Analog Alarms dialog box appears.
2. Enter the alarm properties.
3. Click Add to append a new record, or Replace to modify an existing record.

See Also