janitza UMG 512-Pro, User Manual And Technical Data

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UMG 512-PRO www.janitza.com
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12.7 Failure monitoring (RCM)
The device enables continuous monitoring of the
connection to the residual current transformer for
inputs I5 and I6.
Failure monitoring can be activated via:
·The corresponding menu item, as described in
the section „11.3.1 Transformers“.
·Or by setting the addresses 13793 for the resid-
ual current measurement input I5 and 13795 for
I6.
If there is an interruption in the connection to
the current transformer, this status is recorded in
specific registers or is displayed in the GridVis®
software.
Modbus
addr.
Value/function
13797 (I5)
13799 (I6)
Failure monitoring for I5 / I6
0 = Disable monitoring
1 = Enable monitoring
Modbus
addr.
Value/function
13809 (I5)
13810 (I6)
0 = Connection to the residual
current transformer at I5 or I6 is
fault-free
1 = Fault within the current trans-
former connection at I5 or I6
12.7.1 Alarm status
Using bitwise coding within the alarm registers
(addr. 13925 for I5, 13926 for I6), it is possible to
read out different alarm states:
unused
Alarm
Overcurrent
Warning
Bit:
0
15
0 0 0 0 0 0 0
14 13 12 11 10 9 8
0
7
0 0 0 0 0 0 0
6 5 4 3 2 1 0
Fig. Alarm registers
Example:
An overcurrent was measured. The alarm bit is set
as well and must be acknowledged!
unused
Alarm
Overcurrent
Warning
Bit:
0
15
0 0 0 0 0 0 0
14 13 12 11 10 9 8
0
7
0 0 0 0 1 1 0
6 5 4 3 2 1 0
Fig. Example, alarm register in the event
of measured overcurrent.
Warning: The residual current has exceeded
the set warning limit value
Overcur-
rent:
An overrange is present
Alarm: The alarm bit is set in the event of
a warning or overcurrent.
The alarm bit must be reset or
acknowledged manually.