ABB REG650 Technical Manual page 545

1MRK 502 043-UUS B
Technical Manual
menu/Diagnostics/Internal events or Main menu/Diagnostics/IED status/General.
The information from the self-supervision function is also available in the Event
Viewer in PCM600. Both events from the Event list and the internal events are listed in
time consecutive order in the Event Viewer.
A self-supervision summary can be obtained by means of the potential free change-
over alarm contact (INTERNAL FAIL) located on the power supply module. This
output contact is activated (where there is no fault) and deactivated (where there is a
fault) by the Internal Fail signal, see
and the undervoltage detection of the PSM will deactivate the contact as well.
Power supply fault Power supply
Watchdog
I/O nodes
TX overflow
Master resp.
Supply fault
ReBoot I/O
Internal Fail (CPU)
I/O nodes = BIO
xxxx = Inverted signal
IEC09000390 V1 EN
Figure 245: Hardware self-supervision, potential-free contact
Figure 245. Also the software watchdog timeout
Fault
module
Fault
Fault
CEM
Section 17
Basic IED functions
AND
INTERNAL
FAIL
IEC09000390-1-en.vsd
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