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Project example
Configuring the alarm system
Specifying the type of alarm acknowledgement
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211 SHP−VWNS DE/EN 6.1
4.7.4 Specifying the type of alarm acknowledgement
The "Alarm Classes" parameter of all newly created alarms points to "Alarm". This is based
on a definition hidden under the "Alarm classes" node of Project Explorer.
1. In Project Explorer, click the node Alarms
® Alarm classes.
The table of alarm classes appears.
2. Select the Alarm line and, on the Properties page, set the Acknowledgement
parameter to Acknowledgement necessary.
VisiWinNET
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Smart supports different types of acknowledgement. One type of
acknowledgement defines how often an alarm has to be acknowledged by the user or by
the control system before it disappears from the control elements of the application. As a
result of this setting, an alarm can assume different states during the runtime. For
example, the system distinguishes between the "occurred" status (event bit has been set)
and "occurred acknowledged" status (after bit setting, occurrence has been acknowledged
by the user but the event bit has not yet been reset). The status can be indicated by an icon,
a status text and colours. How a status is indicated is also defined in the Alarm classes.
The status of an alarm can also be bit−coded and stored in a variable. For this purposes, the
status variables have been defined with bit numbers in the alarms. Three bits represents
the status of an alarm in each case.