CNC system: fanuc system 0I-TC
Alarm number: ER07
Alarm description: ER07 OPTION LADDER STEP Ladder diagram option function not found
Reasons for alarm: 1. System data is lost.
Solution: 1. Restore the backed up CNC parameter data.
2. Check the data list and re-enter the CNC parameters.
3. Contact the FANUC system manufacturer to confirm the number of steps in the ladder diagram and select the necessary capacity.
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