Malfunction Reaction - Siemens SIPROTEC 4 7VK61 Manual

Functions
2.7 Monitoring Functions
[logikphasenwinkelueberwachung-wlk-040514, 1, en_GB]
Figure 2-58
2.7.1.5

Malfunction Reaction

Depending on the kind of fault detected, an alarm is given, the processor is restarted or the device is taken out
of operation. After three unsuccessful restart attempts, the device is taken out of service. The device ready
relay drops out and indicates the device failure with its NC contact ("life contact"). The red LED "ERROR" on the
device front lights up, provided that there is an internal auxiliary voltage, and the green LED "RUN" goes off. If
the internal auxiliary voltage supply fails, all LEDs are dark.
functions and the malfunction responses of the device.
Table 2-5
Monitoring possible causes
AC/DC supply voltage External (aux. voltage)
loss internal (converter)
Measured Value Acquis- Internal (converter or refer-
ition ence voltage)
Buffer battery Internal (battery)
Hardware Watchdog Internal (processor failure)
Software watchdog Internal (program execu-
tion)
Main memory Internal (battery)
Program memory Internal (EPROM)
Settings memory internal (Flash-EPROM or
RAM)
Sampling frequency Internal (clock generator)
140
Logic of the Positive Sequence System Phase Angle Monitoring
Summary of Malfunction Responses of the Device
Table 2-5 shows a summary of the monitoring
Error response Message (F.No)
Device out of operation All LEDs dark
alarm, if possible
Error 5V (144)
Protection out of opera- LED "ERROR"
tion, alarm
Error A/D-
conv. (181)
Indication
Fail Battery
(177)
Device not in operation LED "ERROR"
LED "ERROR"
Restart attempt 1)
LED flashes
Restart attempt 1) ,
Restart abort
Device not in operation
LED "ERROR"
Restart attempt 1)
LED "ERROR"
Restart attempt 1)
LED "ERROR"
Restart attempt 1)
Device
DOK 2) drops out
DOK 2) drops out
As allocated
DOK 2) drops out
DOK 2) drops out
DOK 2) drops out
DOK 2) drops out
DOK 2) drops out
DOK 2) drops out
SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018