Self-Supervision (Irf) System - ABB REU 610 Technical Reference Manual

REU 610
5.1.18.
102
Voltage Relay
Technical Reference Manual
Table 5.1.17.1.-9 Event codes E17...E26 (Continued)
Channel Event Description
2 E25 DI5 activated
2 E26 DI5 deactivated
Default value of event mask 2V156

Self-supervision (IRF) system

The relay is provided with an extensive self-supervision system which continuously
supervises the software and the electronics of the relay. It handles run-time fault
situations and informs the user about an existing fault via a LED on the HMI and a
text message on the LCD. The fault codes can also be read via serial
communication. There are two types of fault indications: IRF indications and
warnings.
Internal relay fault
When an internal relay fault preventing relay operation is detected, the relay first
tries to eliminate the fault by restarting. Only after the fault is found to be
permanent, the green indicator LED (ready) begins to blink and the self-supervision
output contact is activated. All other output contacts are returned to the initial state
and locked for the internal relay fault. Further, a fault indication message appears on
the LCD, including a fault code.
IRF indications have the highest priority on the HMI. None of the other HMI
indications can override the IRF indication. As long as the green indicator LED
(ready) is blinking, the fault indication cannot be cleared. In case an internal fault
disappears, the green indicator LED (ready) stops blinking and the relay is returned
to the normal service state, but the fault indication message remains on the LCD
until manually cleared.
The IRF code indicates the type of internal relay fault. When a fault appears, the
code is to be recorded and stated when ordering service. The fault codes are listed in
the following table:
Table 5.1.18.-1 IRF codes
Fault code Type of fault
4 Error in output relay PO1
5 Error in output relay PO2
6 Error in output relay PO3
7 Error in output relay SO1
8 Error in output relay SO2
9 Error in the enable signal for output relay PO1, PO2, SO1 or SO2
10, 11, 12 Error in the feedback, enable signal or output relay PO1, PO2, SO1
or SO2
13 Error in optional output relay SO3
14 Error in optional output relay SO4
1MRS755769
Weighting Default
factor value
256 0
512 0
0