Set the Alarm Scan Rate

You can use the Citect.ini parameter [Alarm]ScanTime to adjust the rate at which the alarm server receives updates from the I/O server. By default, the rate is set to 500 ms. This means the minimum time between alarm transitions will be 500 ms.

If you increase the scan time setting, it reduces the subscription rate used to poll tags that are associated with alarms. This may reduce the load on the I/O server. Be aware, however, that this will only work if no other servers have subscribed to a device at a higher rate.

See Also

Alarm Server Process