Monitoring Possible causes Malfunction response Indication (No.) Output
Working memory ROM internal
(hardware)
Abortion of restart,
device shutdown
LED blinkt
DOK
2)
drops
out
Program memory RAM internal
(hardware)
During boot sequence LED "ERROR"
DOK
2)
drops
out
During operation:
Device out of service
1)
LED "ERROR"
Parameter memory internal
(hardware)
Device out of service
1)
LED "ERROR"
DOK
2)
drops
out
Sampling frequency internal
(hardware)
Device shutdown LED "ERROR“
DOK
2)
drops
out
Error in the I/O board internal
(hardware)
Device shutdown
I/O-Board error
(178),
LED "ERROR“
DOK
2)
drops
out
Error in the extension I/O
board
internal
(hardware)
external
(power supply for
extension I/O board)
3)
Device shutdown
Error Ext. I/O
(10080),
LED "ERROR"
DOK
2)
drops
out
Offset monitoring internal
(hardware)
Device shutdown
Error Offset
(191)
DOK
2)
drops
out
Current sum internal
(measured value
acquisition)
Indication
Failure Σ I
(162)
as allocated
Current symmetry external
(system or current
transformer)
Indication
Fail I balance
(163)
as allocated
Voltage symmetry external
(system or voltage
transformer)
Indication
Fail V balance
(167)
as allocated
Voltage phase sequence external
(system or connec-
tion)
Indication
Fail Ph. Seq. V
176)
as allocated
Current phase sequence external
(system or connec-
tion)
Indication
Fail Ph. Seq. I
(175)
as allocated
Voltage transformer moni-
toring
external
(voltage transformer)
Indication
Fail VT Superv.
(170)
as allocated
Adjustment data error internal
(hardware)
Indication
Alarm NO calibr
(193)
as allocated
1)
Following three unsuccessful restarting attempts, the device is put out of operation.
2)
DOK = "Device OK" = readiness relay drops out; protection and control functions are blocked.
3)
There is a separate power supply for extension I/O board.
Group Indications
Certain indications of the monitoring functions are already combined to group indications. These group indica-
tions and their composition are stated in the Appendix F.4 Group Alarms. Keep in mind that the indication 160
Alarm Sum Event
is only issued when the measured value monitoring functions (8101 MEASURE.
SUPERV) are activated.
Functions
2.12 Monitoring Functions
SIPROTEC Compact, 7SC80, Manual 247
E50417-G1140-C486-A8, Edition 07.2017
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