Mitsubishi Electric MELSEC-L SSCNETIII/H User Manual page 101

Error code
AA15 Head module failure
AAF2 Flash ROM failure
AAF3 Flash ROM failure
AB00 Head module failure
Error
• A malfunction may have occurred due to noise. Check the wire and cable distances
and grounding condition of each device, and take measures against noise.
• Execute a unit test for the head module. If a failure is detected again, the hardware of
the head module may be faulty. Please consult your local Mitsubishi representative.
• If the number of times that data were written to the flash ROM exceeded 100,000,
clear the check box in "Communication Head Setting" of PLC Parameter so that data
of the error history and system error history will not be held at the time of power off or
reset.
• Check the wire and cable distances and grounding condition of each device, and take
measures against noise.
• Execute a unit test for the head module. If a failure is detected again, the hardware of
the head module may be faulty. Please consult your local Mitsubishi representative.
• A RAM error may have occurred due to noise. Check the wire and cable distances
and grounding condition of each device, and take measures against noise.
• Execute a unit test for the head module. If a failure is detected again, the hardware of
the head module may be faulty. Please consult your local Mitsubishi representative.
• A malfunction may have occurred due to noise. Check the wire and cable distances
and grounding condition of each device, and take measures against noise.
• Execute a unit test for the head module. If a failure is detected again, the hardware of
the head module may be faulty. Please consult your local Mitsubishi representative.
CHAPTER 11 TROUBLESHOOTING
Action
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