Applicable Systems
M700V
M70V
M800
M80
C80
Symptoms
Alarm A079: Coordinate system setting invalid - check workpiece coordinate system. The CNC system displays this alarm on the operator panel.
Possible Causes
- Internal software error or data corruption
- Hardware malfunction in the control unit
Troubleshooting Steps
- Step 1: Read alarm A079 on the CNC display and note the full alarm message
Alarm code and description displayed for diagnosis - Step 2: Check the machine status and identify any obvious mechanical, electrical, or pneumatic issues
Visible faults identified or confirmed as intermittent - Step 3: Consult the manufacturer manual for alarm-specific troubleshooting procedures
Root cause identified per manufacturer guidelines - Step 4: Apply the recommended fix and reset the alarm
Alarm cleared and machine resumed normal operation
How to Reset
To reset alarm A079: 1) Address the root cause. 2) Press the RESET key on the CNC panel. 3) If the alarm persists, cycle power to the control. Caution: Repeated alarms without fixing the cause may cause damage.
Frequently Asked Questions
- Q: What does alarm A079 mean?
Alarm A079 indicates: Coordinate system setting invalid - check workpiece coordinate system. Follow the troubleshooting steps to resolve the issue.
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Source: https://cncalarms.com/ and Mitsubishi M70 alarm code references
Category: CNC
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