Allen-Bradley micrologix 1500, Руководство пользователя, Страница: 97 / 149

1 Publication 1764-UM001A-US-P
Appendix
C
Troubleshooting Your System
This chapter describes how to troubleshoot your controller. Topics include:
•
understanding the controller LED status
•
controller error recovery model
•
identifying controller faults
•
calling Rockwell Automation for assistance
Understanding
Controller LEDs
The controller status LEDs provide a mechanism to determine the current status of
the controller if a programming device is not present or available.
D.C. INPUTS
24V SINK / SOURCE
DC/RELAY OUT
24V SOURCE
POWER
RUN
FAULT
FORCE
BAT. LO
COMM 0
DCOMM
LED Color Indicates
POWER off no input power
green power on
RUN off controller is not in Run mode or REM Run
green controller is in Run mode or REM Run
green
flashing system is not in Run mode; memory module transfer is in
progress
FAULT off no fault detected
red flashing faulted user program
red processor hardware fault or critical fault
FORCE off no forces installed
amber forces installed
BATTERY LOW off battery OK
red battery needs replacement (See page B-2.)
COMM 0 off flashes when communications are active
green
COMM 1
(1764-LRP only) off flashes when communications are active
green
DCOMM
(1)
(1) When using a 1764-LRP processor, the DCOMM LED applies only to Channel 0.
off user configured communications mode is active
green default communications mode active
INPUTS off input is not energized
amber input is energized (logic status)
OUTPUTS off output is not energized
amber output is energized (logic status)
AB Spares