You should carefully consider alarm management when you configure a Citect SCADA project, as it could determine if an operator is able to respond to all the alarms that a system generates.
When an operator receives an alarm notification, there are several actions they may need to perform. These include:
If a system generates alarm notifications at a rate that does not allow the operator enough time to perform these tasks, it raises the possibility of alarms being missed.
There are guidelines on the number of alarms which can be successfully managed by an operator. For example, the ISA 18.2 Alarm Management standard provides metrics regarding manageable average alarm rates. It suggests that an average of one alarm per ten minutes is very likely to be acceptable, with a maximum manageable level of two alarms per ten minutes.
The following topics include information you can use to keep the alarms in your system at a manageable level:
If required, you can also configure an alarm server to operate in Extended Memory mode. This allows the alarm server process to utilize memory beyond a 4GB limit. For more information, see Alarm Server Process.
Published June 2018