User manual
Publication 1394-5.0 — May 2000
Troubleshooting 9-9
Understanding GMC Turbo and 
GMC Controller Faults
Use the table below to identify the GMC and GMC Turbo Controller 
faults. The status LEDs are located inside the system module in the 
upper left corner. The figure below shows a picture of the LEDs.
Figure 9.2
GMC Turbo and GMC Status LEDs
LED Status:
Potential cause: Possible resolutions:
0: 1: 2: Type:
Off Off Off Solid Controller OK - no faults N/A
On Off Off Solid Memory fault - Setup or 
program checksum error
Re-Download the GML diagram with the 
setups
Reset the controller.
Off On Off Solid 1394 Initialization 
failure
Reset the controller. If problem persists, return 
controller to the factory for repair.
On On Off Solid AxisLink initialization 
failure
Reset the controller. If problem persists, return 
controller to the factory for repair.
Off Off On Solid RIO interface 
initialization failure
Reset the controller. If problem persists, return 
controller to the factory for repair.
On Off On Solid Flex I/O initialization 
failure
Reset the controller. If problem persists, return 
controller to the factory for repair.
Off On On Solid Interrupt initialization 
failure
Reset the controller. If problem persists, return 
controller to the factory for repair.
On On On Solid DSP or initialization 
failure
Reset the controller. If problem persists, return 
controller to the factory for repair.
On Off Off
Flashing - fast
1
DRAM test #1 failed Return the controller to the factory for repair.
Off On Off
Flashing - fast
1
DRAM test #2 failed Return the controller to the factory for repair.
On On Off
Flashing -fast
1
DRAM test #3 failed Return the controller to the factory for repair.
Off Off On
Flashing - fast
1
Applications memory 
functionality test failed
Return the controller to the factory for repair.
On Off On
Flashing - fast
1
Setup memory 
funcitonality test failed
Return the controller to the factory for repair.
Off On On
Flashing - fast
1
Dual port test #1 failed Return the controller to the factory for repair.
On On On
Flashing - fast
1
Dual port test #2 failed Return the controller to the factory for repair.
On Off Off
Flashing - slow
1
Serial port test failed Return the controller to the factory for repair.
Off On Off
Flashing - slow
1
Timer test failed Return the controller to the factory for repair.
On On Off
Flashing - slow
1
Initialization test failed Return the controller to the factory for repair.
Off Off On
Flashing - slow
1
Auxiliary I/O test failed Return the controller to the factory for repair.
On Off On
Flashing - slow
1
CXIC failed Return the controller to the factory for repair.
Off On On
Flashing - slow
1
DRAM test failed Return the controller to the factory for repair.
On On On
Flashing - slow
1
Transfer system failed Return the controller to the factory for repair.
1
 Flashing slow is twice per second, flashing fast is ten times per second.










