The measurand can be compared with warning and alarm limits. These limits can be displayed as lines in the diagram.
 Channels
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All settings can be entered independently for each channel. The number of tabs depends on the number of active channels.
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 Alarm limit
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The alarm limit is entered in measuring units according to the channel settings.
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 Warning limit
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The warning limit is entered in percent of the alarm limit.
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 Draw lines
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If the checkboxes are activated the alarm limits will be drawn as lines in the diagram.
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 Alert
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When the measuring signal crosses a limit line VM-PLOT can perform the following actions:
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Saving the measured data on disk -
controlling external alarm devices
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 Logic combination of alarms
Each channel may have the following conditions:
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above warning limit: Warning -
These channel status conditions can be combined to an overall status (channel O) by means of logic operations.
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