Service Timers; Wire Break Detection - Deif Multi-line 2 Designers Reference Handbook

AGC
The unit is able to monitor the maintenance intervals. The menu is available in the system setup.
6090 Service timer
The function is based on running hours. When the adjusted time expires, the unit will display an
alarm. The 'alarm acknowledge' function resets this alarm.
When acknowledging the alarm, the timer will be reset and a new service timer alarm will only
reoccur after the adjusted time has elapsed. The running hours is counting, when the running
feedback is present.
If it is necessary to supervise the sensors/wires connected to the analogue inputs (4-20mA,
VDO and PT100), then it is possible to use the menus 4370-4430 depending on the HW options
available in the unit. If the measured value on the input is outside the normal dynamic area of
the input, it will be detected, as if the wire has made a short circuit or a break. An alarm with a
configurable fail class will be activated.
4-20mA
VDO 104
VDO 105
VDO 106
PT100 – 106
PT100 – 109
DEIF A/S

Service timers

Wire break detection

Wire failure area
Below 4mA
0...40%
0...40%
0...40%
0...40%
0...40%
Designer's Reference Handbook
The fail class drop
down panel is acti-
vated, and the user
wants to select the 'trip
of GB' fail class.
Normal range
4-20mA
-
-
-
-
-
Wire failure area
Above 20mA
60...100%
60...100%
60...100%
60...100%
60...100%
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