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Section 5 Operation
Alarm and Event Usage
Alarms and events both from the process and the control system itself can be viewed
and acted upon in the Operator Workplace via lists, alarm summary indication etc.
The main difference between an alarm and event is that an alarm normally requires
an action by an operator, e.g. acknowledge. An alarm list only includes the alarms
that an operator needs to pay attention to, normally unacknowledged and still active
alarms. Some alarms may be hidden, which means that they will not be included in
the standard alarm list.
Hidden alarms can still be viewed in the event list. Typically alarms generated as a
consequence of another alarm or other alarms that are irrelevant for the operator in
the current process operation mode may be hidden.
An event list includes the history for both alarms and events. Alarms or events can
have different priorities that are indicated by different colors in e.g. lists.
Process alarm and event lists can either include all process alarms or alarms for a
specific part of the process down to a single process object.
The following pre-configured lists exist to view different types of alarms and
events:
•
Process alarm list displaying all process alarms except hided alarms
•
System alarm list displaying all system alarms for the Compact HMI 800
system.
•
Process event list displaying the process event history
•
System event list displaying the system event history
•
Alarm lists on standard process objects displaying the alarms for the object
•
Event lists on standard process objects displaying the event history for the
object.
Process Alarms
Process Alarms are alarms that are generated from the process, such as failure in a
valve or pump or an overpressure in a tank.
Examples of how to access different Alarm Lists are listed below.
3BSE040587R4401
Alarm and Event Usage
105
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