B - troubleshooting, Status indicators on the controller, Appendix b – Rockwell Automation 2080-LC20-20QBBR Micro820 20-point Programmable Controllers User Manual User Manual
Page 119: Troubleshooting, Troubleshooting on, Appendix

Rockwell Automation Publication 2080-UM005A-EN-E - December 2013
111
Appendix
B
Troubleshooting
Status Indicators on the
Controller
Status indication on the Micro820 controller is as follows.
Status Indicator Description
Description
State
Indicates
1
Input status
Off
Input is low.
On
Input is energized (terminal status).
2
Fault status
Off
No fault detected.
Red
Controller hard fault.
Flashing red
Major fault detected.
3
Run status
Green
Executing the user program in run mode.
Flashing Green (1 Hz)
The controller is in program mode.
4
Serial
communications
status
Off
No traffic for RS232/RS485.
Green
Traffic through RS232/RS485.
5
Force status
Off
No force conditions are active.
Amber
Force conditions are active.
Input status
Run status
Fault status
Force status
Comm status
ENET status
SD status
Output status
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