ABB REF 54 Series Technical Reference Manual page 60

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60
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Technical Reference Manual, General
• All relay outputs will be forced to zero (released), and subsequent changes
blocked.
• All virtual outputs (COMM_OUT1..32) will be written to zero, and subsequent
changes blocked.
• The analogue outputs will freeze at the current value.
• Event transmission will be blocked, except for IRF events E56/E57 and startup
event E50.

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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.
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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.
Do not reset the feeder terminal before reading the IRF code. The code
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should be noted in the service report (refer to page 102) when overhaul
is ordered. In case of a repeating IRF, send the relay to the manufacturer.
The following table gives an overview of the fault origin.
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0 -> Faults related to a module of the feeder terminal, e.g. the MIMIC
card, BIO card or RTD/analogue module
3000 -> Faults related to the parameter database
6000 -> Faults related to the analogue measurement inputs
7000 -> Software faults
15000 -> Faults related to testing
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The feeder terminal has three serial communication ports, one on the front panel and
two on the rear panel.
1. This feature is supported in the feeder terminal revisions of the Release 2.5 or
later.
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