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Publication 1756-UM001G-EN-P - January 2007
Appendix
A
LED Indicators
Introduction
This appendix explains the LED indicators for ControlLogix
controllers.
RUN LED Indicator
I/O LED Indicator
Topic
Page
Condition
Indicates
Recommended Action
Off
The controller is in Program or Test mode.
Change the controller mode.
Solid green
The controller is in Run mode.
Condition
Indicates
Recommended Action
Off
•
Either there are no devices in the I/O
configuration of the controller.
•
The controller does not contain a project
(controller memory is empty).
•
Add the required devices to the I/O configuration of the
controller.
•
Download the project to the controller.
Solid green
The controller is communicating with all the
devices in its I/O configuration.
None
Flashing green
One or more devices in the I/O configuration
of the controller are not responding.
Go online with RSLogix 5000 programming software and check the
I/O configuration of the controller.
Flashing red
The chassis is bad.
Replace the chassis.
Summary of Contents for controllogix 1756-L55M12
Page 4: ...Publication 1756 UM001G EN P January 2007 Summary of Changes 4 Notes...
Page 10: ...Publication 1756 UM001G EN P January 2007 10 Notes...
Page 66: ...Publication 1756 UM001G EN P January 2007 66 Place Configure and Monitor I O Modules Notes...
Page 82: ...Publication 1756 UM001G EN P January 2007 82 Develop Applications Notes...
Page 122: ...Publication 1756 UM001G EN P January 2007 122 Maintain Nonvolatile Memory Notes...
Page 130: ...Publication 1756 UM001G EN P January 2007 130 Maintain the Battery Notes...
Page 134: ...Publication 1756 UM001G EN P January 2007 134 LED Indicators Notes...