West Control Solutions DataVU 7 - Manual (Page 110)

13 Configuration - Analog Inputs
110
Hysteresis
(differential) The hysteresis serves to prevent an unsteady (flickering) alarm state (repeated,
brief switching on and off due to the noise of the input signal). The higher the
value, the larger the amount by which the present measurement must go
above or below the limit in order to cancel the alarm.
Alarm delay This parameter delays the reporting of an alarm. If the alarm is no longer
present after the alarm delay time has elapsed, it will not be triggered.
Alarm text 1/
alarm text 2 There is an alarm text for each type of alarm, which, in the event of an alarm, is
displayed in the “status & title bar” and entered in the event list.
13.4.2 Alarm rejection
Overview
Alarm
rejection This function makes it possible to suppress the alarms of a channel when a
binary signal is active (HIGH state).
- Both alarms are suppressed.
- There is no indication of overrange, underrange. or probe break.
- Alarms that are present become inactive.
- Overrange und underrange alarms become inactive.
- There is no alarm or event entry when alarm rejection is active.