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GFK-0726B
Chapter 3 Troubleshooting
This chapter provides procedures for diagnosing State Logic Processor (SLP) problems.
If these procedures do not solve the problem, contact the GE Fanuc Hotline
(1-800-828-5747) for assistance.
Status LED is not ON Steady
1. Check that power is supplied to the I/O rack housing the SLP. Try removing and
reinstalling the SLP.
2. Cycle power to the SLP, then press the reset button for more than 5 seconds.
3. Turn the power OFF and disconnect the battery and short the SLP battery terminal
connection points to clear the SLP. Reconnect the battery, turn ON power again, and
reset the SLP.
4. Check that the CPU is functioning properly by checking its “OK” LED.
5. Check that there are no empty slots between the CPU and the SLP. If there are
empty slots, the Status LED blinks continuously.
6. If the Status LED is still not ON, try to download a program from ECLiPS or OnTOP.
If you can connect with the SLP and download a program, then the Status LED is
faulty.
7. If you get a message that ECLiPS or OnTOP cannot connect to the controller, then
check the fault table in the CPU using Logicmaster 90. If there is a fault “Bad or
missing module”, then the SLP is faulty and must be returned for repairs.
8. If there is no fault then contact the GE Fanuc Hotline for assistance.
Serial Communication Problems
This section is split into two parts, communication problems to ECLiPS or OnTOP and
problems with other serial devices.