Operation Indicators - Allen-Bradley Rockwell Automation 857 User Manual

2-4
Local Panel User Interface
857-UM001A-EN-P – July 2009

Operation Indicators

The relay is provided with eight LED indicators:
Power
Error
Com
Alarm
Trip
A
B
C
Figure 2.5 – Operation Indicators of the Relay
Table 2.1 – Operation Indicators
LED indicator
Power LED lit The auxiliary power has been
switched on
Error LED lit Internal fault, operates in parallel
with the self supervision output
relay
Com LED lit or The serial bus is in use and
flashing transferring information
Alarm LED lit One or several signals of the
output relay matrix have been
assigned to output LA and the
output has been activated by one
of the signals. (For more
information about output matrix,
please see "Configuring Digital
Outputs DO".
Trip LED lit One or several signals of the
output relay matrix have been
assigned to output Tr, and the
output has been activated by one
of the signals. (For more
information about output relay
configuration, please see
"Configuring Digital Outputs
DO").
A- C LED lit Application-related status
indicators.
Meaning
Normal operation state
The relay attempts to reboot
[REBOOT]. If the error LED
remains lit, call for
maintenance.
Normal operation state
The LED is switched off when
the signal that caused output
Al to activate, e.g. the START
signal, is reset. The resetting
depends on the type of
configuration, connected or
latched.
The LED is switched off when
the signal that caused output
Tr to activate, e.g. the TRIP
signal, is reset. The resetting
depends on the type of
configuration, connected or
latched.
Configurable
Remarks