Mitsubishi Electric GOT2000 Series Hardware User Manual page 370

PLC status
■PLC failure
Check Symptom
□ Always occurs.
□ Occurs sometimes.
□ Operates normally.
12 TROUBLESHOOTING
368
12.1 GOT Restoration Sheets
Cause/status
CONTROL-BUS. ERROR, SP. UNIT LAY.
ERROR, or others is considered.
Error code (system alarm):
• Example: 1204 CPU H/W failure
The PLC CPU may be affected by noise or the
hardware may be faulty.
Frequency:
• Example: Once a month
Error code (system alarm):
• Example: 1204 CPU H/W failure
—
Corrective action
Proceed to the following.
Page 377 Troubleshooting for the Bus Connection
Proceed to the following.
GOT restoration procedure