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RE_ 54_
6.3.2.
30
Feeder, Machine and Transformer Terminals
Operator's Manual
Self supervision (IRF)
The RE_ 54_ terminal is provided with an extensive self-supervision system. The
system handles run-time fault situations in RE_ 54_ and informs the user about an
existing fault via the HMI and LON/SPA communication.
The green Ready LED indicator starts flashing when a fault has been detected. At
the same time, the terminal delivers a fault signal to the self-supervision output relay
of RE_ 54_. Additionally, a fault indication text appears on the HMI and an event
E57 is generated to serial communication (channel 0).
The fault indication text on the HMI consists of two constant rows as shown below.
S E L F S U P E R V I S I O N
* I N T E R N A L F A U L T *
Fault indication has the highest priority on the HMI. Other HMI indications cannot
overrun the IRF indication. When the display panel has received a fault indication,
the fault indication text remains on the HMI. The fault indication text can be cleared
from the display by pressing [C] for 2 seconds, but the green LED indicator remains
flashing. Flashing of the green Ready LED indicator cannot be stopped.
In case an internal fault disappears, the fault indication text stays on the display
unless it has been cleared by pressing [C]. The green Ready LED indicator stops
flashing and an alarm output IRF is released to normal service state. Moreover, an
event E56 is generated to serial communication (channel 0).
Fault code
When an internal fault appears in RE_ 54_, the self-supervision system generates an
IRF code that indicates the type of the fault. The fault code can be read from MAIN
MENU/Status/General/IRF code. The code indicates the first internal fault
detected by the self-supervision system.
Do not reset the terminal before reading the IRF code. The code should be
!
noted and reported when overhaul is ordered.
Fault recovery (REF 54_, Release 2.5 and later, RET 54_)
The relay will try to recover from a fault either by restarting the module (I/O module
or HMI) that reported the fault, or by restarting the whole relay. During restarting
the IRF state will remain active until the internal selfsupervision program has
determined that the relay is operating normally. If the fault is still persistent after
restarting three times, the relay will be in permanent IRF state.
When returning to normal operation, the indication text will be replaced by this text:
'internal fault *CLEARED*', and the green READY indicator will return to steady
state. In addition, an event 0/E56 is generated over the serial communication.
1MRS750500-MUM
assisupv_b
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