Applicable Systems
Series 0i
Series 16/18/21
Alpha
Beta
Symptoms
The stored program content does not match the tape content during program verification.
Possible Causes
- Program syntax or logic error
- Incorrect parameter or setting
- Operator input mistake
- Corrupted program data
Troubleshooting Steps
- Step 1: Review the CNC alarm display for the specific alarm code and message
Identify the exact alarm code and its description - Step 2: Check the NC program block indicated by the alarm for syntax errors
Locate and correct the programming error - Step 3: Verify all parameters related to the alarm are set correctly
Parameters match the machine specification - Step 4: Clear the alarm by pressing RESET and retry the operation
Alarm clears and operation resumes normally
How to Reset
To reset P/S alarm 079: 1) Correct the program or parameter that caused the alarm. 2) Press the RESET key on the CNC panel. 3) If the alarm persists, power cycle the CNC. 4) For parameter-related alarms, set PWE=0 before resetting. Caution: Always identify and fix the root cause before resetting.
Frequently Asked Questions
- Q: What does 079 mean on Fanuc FANUC 0/0i/30i Series?
The stored program content does not match the tape content during program verification.
- Q: How do I fix 079 on Fanuc?
Follow the troubleshooting steps: Review the CNC alarm display for the specific alarm code and message
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Source: FANUC CNC System Alarm Manual (doc.eleok.com)
Category: CNC
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