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HART Loop Converter KFD2-HLC-(Ex)1.D(.**)
Editing device data: Relay
32
8.5.5 Restart inhibit
With the restart inhibit, you prevent momentary trip violations from going unnoticed by
operating personnel.
If
Restart inhibit on
is selected, after the relay switches, the new status remains active until the ESC
key is pressed or the device is restarted. This will reset the relay unless the trip violation is still pending.
8.5.6 Response delay
Setting a response delay > 0 seconds prevents momentary trip violations from triggering an alarm.
•
The relay only switches when the trip value exceeds or falls below the trip point for a period longer
than the delay time without interruptions.
•
The relay only switches back when the trip value exceeds or falls below the trip point/hysteresis for
a period longer than the delay time without interruptions.
•
Momentary excesses/shortfalls have no effect.
The following illustration shows the switching characteristics, in this example, switching direction
Max
,
switching mode
Active
.
Max. - hysteresis
Max. trip point
Measured value
Time
energized
de-energized
Switching direction
Max
, switching mode
Active
, with delay
Delay
Delay
