Understanding Controller LEDs
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| 24V SINK / SOURCE | |||||
POWER |
| DC/RELAY OUT | ||||
RUN |
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FAULT |
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FORCE |
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BAT. LO |
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COMM 0 |
| 24V SOURCE | ||||
DCOMM |
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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
The controller status LEDs provide a mechanism to determine the current status of the controller if a programming device is not present or available.
LED | Color | Indicates |
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POWER | off | no input power |
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| green | power on |
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RUN | off | controller is not in Run mode or REM Run |
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| green | controller is in Run mode or REM Run |
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| green | system is not in Run mode; memory module transfer is in |
| flashing | progress |
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FAULT | off | no fault detected |
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| red flashing | faulted user program |
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| red | processor hardware fault or critical fault |
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FORCE | off | no forces installed |
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| amber | forces installed |
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BATTERY LOW | off | battery OK |
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| red | battery needs replacement (See page |
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COMM 0 | off | flashes when communications are active |
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| green |
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COMM 1 | off | flashes when communications are active |
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green |
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DCOMM(1) | off | user configured communications mode is active |
| green | default communications mode active |
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INPUTS | off | input is not energized |
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| amber | input is energized (logic status) |
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OUTPUTS | off | output is not energized |
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| amber | output is energized (logic status) |
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(1) When using a
Basic 32 Loader Control UGC007/0702