Rockwell Automation 999 IMC S Class Compact Motion Controller (Cat. No. 4100-999-122) - Manual (Page 175)

Troubleshooting 7-5
Publication 999-122 - January 1997
Understanding Status LEDs Three general purpose status LEDs are provided on the front panel of
the IMC-S/23x. These LEDs (status 0, 1, and 2) indicate the results of
power-up diagnostics.
Table 7.A Status LEDs
* Flashing slow is twice per second, flashing fast is ten times per second.
Understanding the System
OK LED If the system passes its power-up diagnostics, all three status lights are
off and the System OK LED (CPU Watchdog) is illuminated.
For this LED:
0 1 2 Status of the LED: Description: Possible resolution:
Off Off Off Solid Controller okay. No faults. None.
On Off Off Solid Memory fault. Setup or
program checksum error. Note: This condition is normal after you change
firmware or perform a hardware re-init.
Download the GML diagram and the setups again
and reset the controller.
On On Off Solid AxisLink initialization failure Reset the control. If the problem persists, return to
the factory for repair.
Off Off On Solid RIO interface initialization
failure Reset the control. If the problem persists, return to
the factory for repair.
On Off On Solid Flex I/O initialization failure Reset the control. If the problem persists, return to
the factory for repair.
Off On On Solid Interrupt initialization failure Reset the control. If the problem persists, return to
the factory for repair.
On On On Solid Initialization failure Reset the control. If the problem persists, return to
the factory for repair.
On Off Off Flashing fast* Dram test #1 failed Return to the factory for repair.
Off On Off Flashing fast* Dram test #2 failed Return to the factory for repair.
On On Off Flashing fast* Dram test #3 failed Return to the factory for repair.
Off Off On Flashing fast* Applications memory
functionality test failed Return to the factory for repair.
On Off On Flashing fast* Setup memory functionality
test failed Return to the factory for repair.
On Off Off Flashing slow* Serial port test failed Return to the factory for repair.
Off On Off Flashing slow* Timer test failed Return to the factory for repair.
On On Off Flashing slow* Initialization test failed Return to the factory for repair.
Off Off On Flashing slow* Auxiliary I/O test failed Return to the factory for repair.
On Off On Flashing slow* CXIC failed Return to the factory for repair.
Off On On Flashing slow* DRAM test failed Return to the factory for repair.
On On On Flashing slow* Transfer system failed Return to the factory for repair.