and alarms the failure state of the relay with its normally closed contact. Also, the red LED "ERROR" lights up
on the front cover, if the internal auxiliary voltage is present, and the green RUN "LED" goes out. If the internal
auxiliary supply also fails all LEDs are extinguished. The following table summarises the monitoring functions
and the malfunction responses of the device.
Table 2-7 Summary of Malfunction Responses of the Device
Monitoring possible causes Malfunction Response Indication (No.) Output
Auxiliary supply voltage
loss
External (aux. voltage)
internal (converter)
Device not in operation alle LED dunkel
GOK
2)
drops out
Internal supply voltages Internal (converter) or
reference voltage
Device not in operation LED „ERROR“
Error A/D-
conv.
(181)
GOK
2)
drops out
Battery Internal (battery) Indication
Fail Battery
(177)
Alarm Sum
Event
(160)
Hardware Watchdog Internal (processor failure) Device not in operation
1)
LED „ERROR“
GOK
2)
drops out
Software Watchdog Internal (processor failure)
Restart attempt
1)
LED „ERROR“
GOK
2)
drops out
Working memory ROM Internal (hardware) Aborted restart, Device
not in operation
LED blinkt
GOK
2)
drops out
Program memory RAM Internal (hardware) during startup LED blinkt
GOK
2)
drops out
während Betrieb:
Restart attempt
1)
LED „ERROR“
Settings memory Internal (hardware)
Restart attempt
1)
LED „ERROR“
GOK
2)
drops out
Sampling frequency Internal (hardware) Device not in operation
Fail. Sampling
(25043)
LED „ERROR“
GOK
2)
drops out
Channel monitoring U1 Internal (hardware) Indication
Sync Fail Ch
U1
(25037)
Synchronizing is
blocked
Channel monitoring U2 Internal (hardware) Indication
Sync Fail Ch
U2
(25038)
Synchronizing is
blocked
ADC monitoring Internal (hardware) Indication
Error ADC
(25036)
GOK
2)
drops out
Phase sequence for
voltage side 1
External (power system or
connection)
Indication
SyncSeq U1
fail
(25039)
Synchronizing is
blocked
Phase sequence for
voltage side 2
External (power system or
connection)
Indication
SyncSeq U2
fail
(25040)
Synchronizing is
blocked
Data current state internal (software) or
external influenced by
disturbance
Indication
Fail. Sampling
(25043)
Protection and
synchronizing
function are
blocked
Data continuity Disturbance influencing Indication
Sync Fail Data
(25054)
Delay of the
synchronizing
function
Function group selec-
tion
External (power system or
connection) or parame-
trizing error
Indication Sync FG-Error
(222.2096)
Synchronizing is
blocked
Functions
2.12 Supervision
SIPROTEC 4, 7VE61 and 7VE63, Manual 115
C53000-G1176-C163-3, Edition 10.2017