Definition: Alarm group

Alarm groups are displayed in the project explorer under the access node of the same name. Their primary task is to group alarm definitions. Alarm groups can be nested hierarchically.

Alarm groups include the following functionality:

Alarm groups allow the alarm system to be structured according to machine units.
Alarm groups can be used as collective alarms. Collective alarms can be used to display all alarms contained in the alarm group as one alarm. All pending alarms in an alarm group can also be acknowledged via the collective alarm. The origin of alarms can be determined at runtime via the alarm group.
The status of machine units can be logged via the status variable.

The "System alarm" alarm group is automatically created in a project. This defines the behaviour of all system alarms originating from the server applications (e.g. communication error messages). This group cannot be deleted or renamed.

The alarm group definition contains the following parameters:

Parameter name	Description of the
Bit number (Alarms module)	Deactivation variable Defines the bit within the variable that triggers the function.
	Bit number (Alarms module) Acknowledgement variable Defines the bit within the variable that triggers the function.
Bit number (Alarms module)	Status variable Defines the bit within the variable that triggers the function.
Deactivation variable	Variable for switching on/off all alarms contained in the group (at runtime)
Definition active	Determines whether the object definition is valid.
Comment	Optional commentary on the object.
Name	Name of the object.
Priority variable	Variable for saving the highest current priority
Acknowledgement variable	Name of the variable with which an alarm can be acknowledged
Status variable	Name of the variable with which the status and the acknowledgement status can be determined
Symbol	Graphic symbol for the display
Text	Localisable text for the object.