1MRS750527-MUM
REF 54_
67
Feeder Terminal
Technical Reference Manual, General
5.1.12.3. Fault recovery
1
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 self supervision 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.
5.1.12.4. Fault codes
When an internal fault appears in REF 54_, the self-supervision system generates an
IRF code that indicates the type of the fault. The fault code can be read from the
feeder terminal main menu Status/General/IRF code. The fault code is also
delivered as event data with the IRF event if LON communication is in use. The code
indicates the first internal fault detected by the self-supervision system. The fault
code can be read from the menu even though the relay has returned to normal
operation.
The following table gives an overview of the fault origin.
5.1.13. Serial communication
The feeder terminal has three serial communication ports, one on the front panel and
two on the rear panel.
Serial communication port assignment
The bus communication protocol for the rear interface RS-232 (connector X3.2) is
selected via the “Protocol 2” setting parameter and the bus communication protocol
for the rear interface RS-485 (connector X3.3) is selected via the “Protocol 3”
setting parameter. These parameters can be modified by using the local menu
(Communication/General)or by using the Relay Setting Tool.
The following table shows supported parallel communication protocols on the front
and the rear connectors of the REF 54_ feeder terminals.
1. This feature is supported in the feeder terminal revisions of Release 2.5 or later.
Do not reset the feeder terminal before reading the IRF code. The
code should be noted when overhaul is ordered. In case of a
repeating IRF, send the relay to the manufacturer.
Codes Explanation
0 -> Faults related to a module of the feeder terminal, such as the MIMIC
card, BIO/PS cards and RTD/analog module
3000 -> Faults related to the parameter database
6000 -> Faults related to the analog measurement inputs
7000 -> Software faults
15000 -> Faults related to testing
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