Alarm Limits

Alarm limits are schemes that can be used to trigger alarms. They are useful when the same threshold values are to be used for several measuring points or further conditions for triggering of the alarm are to be added.

All alarm limits are shown that are visible to the current user on the basis of the group allocation. Unused alarm limits (no measuring point allocated) are shown with a block dot.

The following functions are available for creating and editing alarm limits:

Filter	Filter the list of alarm limits on the basis of the entry
New	Add new alarm limit
Delete	Delete alarm limit
Save	Save changes

Every alarm limit has the following properties:

ID	Unique ID number (AS-xxxx)
Name	Freely selectable name
Parameter	The unit of the measured value must be specified correctly so that unit conversions by the system are carried out correctly
Applicable in	Group in which the alarm limit can be applied
Used by	Measuring points that use this alarm limit
Condition
Switch input	Switch contact or virtual switch to serve as precondition whether the alarm limit is enabled or not.
Active time	Time in which the alarm thresholds 1 are enabled. Outside this time the alarm thresholds 2 are enabled.
Alarm thresholds 1 / 2
Enabled / Disabled	Only enabled alarms are processed in the system
Lower limit	Lower limit value
Upper limit	Upper limit value
Hysteresis	Hysteresis
Delay	Delay for alarm release
Action	Action that is to be carried out when the alarm is triggered (see section 5.2)