Rockwell Automation 1756-L6x_L7x ControlLogix System User Manual - Manual (Page 195)

Rockwell Automation Publication 1756-UM001O-EN-P - October 2014 195
Troubleshoot the Module Appendix A
1756-L7x Controller
Status Indicators The status indicators are below the status display on the controller. They indicate
the state of the controller as described in these tables.
RUN Indicator
Use the mode switch on the front of the controller or use the Controller Status
menu in the Logix Designer application to change the controller mode that is
shown by the RUN indicator.
FORCE Indicator
The Force indicator shows if I/O forces are enabled on the controller.
SD Indicator
The SD indicator shows if the SD card is in use.
Table 52 - RUN Indicator
State Description
Off The controller is in Program or Test mode.
Steady green The controller is in Run mode.
Table 53 - FORCE Indicator
State Description
Off No tags contain I/O force values.
Solid amber I/O forces are active (enabled) though I/O force values and can be configured.
Use caution if you install (add) a force. If you install (add) a force, it immediately takes
effect.
Flashing amber One or more input or output addresses have been forced to an On or Off state, but the forces have
not been enabled.
Use caution if you enable I/O forces. If you enable I/O forces, all existing I/O forces also
take effect.
Table 54 - SD Indicator
State Description
Off No activity is occurring with the SD card.
Flashing green The controller is reading from or writing to the SD card.
Do not remove the SD card while the controller is reading or writing.
Solid green
Flashing red The SD card does not have a valid file system.
Solid red The controller does not recognize the SD card.