ABB Industrial IT enabled REX 521 Technical Reference Manual, General page 25

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Technical Reference Manual, General
Normal condition
IRF
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When a fault has been detected, the green READY LED indicator starts blinking, a
fault indication text is displayed on the HMI and an event "IRF activated" (E31) is
generated over serial communication.
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Below, the different fault indication texts that may appear, the corresponding fault
codes and the actions that should be taken. The fault code is only used for remote
control systems connected to the serial communication.
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INTERNAL FAULT 1
Relay HSPO1
INTERNAL FAULT 7
Relay PO1
INTERNAL FAULT 8
Relay PO2
INTERNAL FAULT 9
Relay PO3
INTERNAL FAULT 15
Relay SO1
INTERNAL FAULT 16
Relay SO2
INTERNAL FAULT 20
Relay control
INTERNAL FAULT 21
Relay test
INTERNAL FAULT 30
NOV error
INTERNAL FAULT 40
EEPROM error
INTERNAL FAULT 50
RAM error
INTERNAL FAULT 60
IRF error (test)
5
4
IRF
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Protection operative, but the faulty output relay cannot be
controlled
Protection operative, but the faulty output relay cannot be
controlled
Protection operative, but the faulty output relay cannot be
controlled
Protection operative, but the faulty output relay cannot be
controlled
Protection operative, but the faulty output relay cannot be
controlled
Protection operative, but the faulty output relay cannot be
controlled
Protection inoperative. An attempted relay control operation
failed.
Protection inoperative. Two or more relays were found faulty
during test.
Protection operative. Nonvolatile memory error. The corrupted
data cannot be used. May be solved by restoring the factory
settings.
Protection inoperative
Protection inoperative
Protection operative
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Fault condition
5
4
3
IRFoutputrex
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