What causes FANUC alarm 007?

Part program contains an illegal or malformed command related to the alarm condition. Missing required address word or parameter value in the program block. Programmed value is out of the allowable range. Conflict between active modal codes and the commanded function. Post-processor configuration mismatch for this Fanuc series.

How do I fix FANUC alarm 007?

1. Note the block number shown in the alarm screen and locate that block in the program. 2. Review the command in that block against the Fanuc programming manual. 3. Check for missing words, incorrect values, or conflicting G-code combinations. 4. Verify the program is post-processed for the correct Fanuc series. 5. Correct the program and dry-run at low speed before resuming machining.

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FANUC Controller

Program/G-code · Basic · 5-10 minutes

Alarm 007

Fanuc Alarm 007 - Invalid Decimal Point

Fanuc Alarm 007 occurs when a decimal point is used in a G-code address that does not accept decimal notation. This is a program syntax error caused by incorrect address formatting in the part program, most commonly with addresses that require integer values only such as N (sequence number), G (preparatory function), M (miscellaneous function), T (tool number), or H/D (offset numbers).

FANUCProgram/G-codeBasic5-10 minutes

007

Fanuc Alarm 007 - Invalid Decimal Point

Illegal Use of Decimal Point

Root Cause Summary

Fanuc Alarm 007 occurs when a decimal point is used in a G-code address that does not accept decimal notation. This is a program syntax error caused by incorrect address formatting in the part program, most commonly with addresses that require integer values only such as N (sequence number), G (preparatory function), M (miscellaneous function), T (tool number), or H/D (offset numbers).

Safety

Command will not execute

Causes and Fixes

1
Note the block number (N number) displayed with the alarm on the CNC display screen. Press RESET to clear the alarm and access the program.
2
Navigate to EDIT mode, select the program causing the alarm, and search for the block number indicated in the alarm message.
3
Examine all address codes in the flagged block for decimal points. Check G, M, T, N, H, D, S, P, and L codes specifically. Remove any decimal points from these addresses (e.g., change 'G01.0' to 'G01', 'M03.5' to 'M03').
4
Verify Parameter 3450 (decimal point input setting) to confirm which addresses accept decimal input for your specific machine configuration. Bit settings determine allowed decimal usage per address.

DIY Feasiblehigh confidence

Call a technician if:

·Parameter changes required beyond operator authority
·Systematic post-processor issues affecting multiple machines
·Alarm persists after correcting obvious decimal point errors

Prevention

Establish consistent decimal point formatting standards
Verify CAM post-processor FANUC compatibility
Use program check mode before running new programs
Train programmers on FANUC address format requirements

Common Mistakes

Adding decimal points to tool numbers (T01.0 instead of T01)
Using multiple decimal points in single values
Mixing calculator and standard decimal formats
Copying code between different control types without format verification

Related Alarms

006 008 009 010

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