Warning indication Warning code Additional information
Comm. channel down 35 Redundant Ethernet (HSR/ PRP)
communication interrupted.
Settings mismatch 36 Mismatch between parameter set-
tings and application configuration.
Protection comm. 50 Error in protection communication.
ARC1 cont. light 85 A continuous light has been detec-
ted on the ARC light input 1.
ARC2 cont. light 86 A continuous light has been detec-
ted on the ARC light input 2.
ARC3 cont. light 87 A continuous light has been detec-
ted on the ARC light input 3.
ARC4 cont. light 88 A continuous light has been detec-
ted on the ARC light input 4.
RTD meas. warn.,slot D –54 Abnormal signal from sensor(s) re-
ceived in slot D.
RTD meas. warn.,slot C –50 Abnormal signal from sensor(s) re-
ceived in slot C.
mA output warn.,slot D –24 Temporary error occurred in RTD
module located in slot D.
mA output warn.,slot C –20 Temporary error occurred in RTD
module located in slot C.
3.3.3 Power supply module Ready LED and HMI Home button
LED
Both power supply module Ready LED and LHMI Home button LED visualize the
self-supervision state of the relay.
Table 45
shows how these states are indicated.
Table 45: Power supply module Ready LED and local HMI Home button LED
State Power supply
module Ready
LED
LHMI Home
button
Alarm
acknowledged
Relay under normal operation and
LHMI connected
Steady green Steady green N/A
Relay’s IRF activated, but communi-
cates with LHMI
HF blinking
green
HF blinking red N/A
Communication lost between Relay
and LHMI, but no IRF
Steady green HF blinking
green
N/A
LHMI not running normally or in
start-up initialization phase
Steady green HF blinking
green
N/A
Process related alarm active Steady green LF blinking red No
Process related alarm active Steady green Steady red Yes
Process related alarm has been ac-
tive earlier, but is not any more ac-
tive
Steady green LF blinking red No
Table continues on the next page
1MRS759142 F Basic functions
REX640
Technical Manual
109
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