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7 Configuration
7.13 Limit value monitoring functions
The general limit value monitoring functions can be used for different analog signals. Each limit value
monitoring function delivers a status signal and an alarm signal:
• The status signal is active (1), if a max. alarm or a min. alarm was enabled and the limit value is ex-
ceeded or the value drops below the minimum (limit value infringement).
• The alarm signal depends on the status signal and the "Alarm for status" parameter.
Depending on the configuration, an entry is made in the event list or additionally in the alarm list. In the
latter case, the alarm/event text is displayed in the status bar (until another alarm occurs); the collective
alarm is enabled, and the plotter trace may be displayed in a different color.
General limit value monitoring is independent of limit value monitoring of the analog inputs and external
analog inputs.
Device dialog box
Parameter
Parameter Selection/settings Description
Channel designa-
tion
LM ...
Use default text or enter other text.
Name (abbreviation) with max. 5 charac-
ters that is used in the visualizations.
Channel descrip-
tion
Limit value monitor. ...
Use default text or enter other text.
Description (designation) with max. 21
characters
Alarm for status This setting decides whether the alarm signal is active for active or inactive limit val-
ue infringement.
High (1) Alarm signal is active for a high level of
the status signal (limit value infringe-
ment).
Low (0) Alarm signal is active for a low level of
the status signal (no limit value infringe-
ment).
Signal source Analog selector
No selection
Input signal of limit value monitoring (sig-
nal to be monitored).
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