What causes FANUC alarm PS024?

Canned cycle command missing a required address word (R, Z, Q, etc.). Canned cycle commanded on an incorrect axis or in an incorrect plane. Conflicting canned cycle commands or modal G-codes. P or Q value negative when positive is required. Canned cycle used in a mode that does not support it.

How do I fix FANUC alarm PS024?

1. Check the canned cycle block for all required address words. 2. Verify the drilling plane (G17/G18/G19) matches the cycle axis. 3. Check for conflicting modal G-codes active when the cycle is called. 4. Consult the Fanuc programming manual for the specific canned cycle format.

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FANUC Controller

Program/G-code · Basic · 10-20 minutes

Alarm PS024

Fanuc Alarm PS024 - Canned Cycle Parameter Error

PS024 alarm occurs when a canned cycle (G73, G74, G76, G80-G89) is executed with missing, conflicting, or out-of-range address parameters. The Fanuc control detects invalid Q, R, P, or axis position values that violate canned cycle syntax rules defined in parameters 5101-5109 and 5114-5149.

FANUCProgram/G-codeBasic10-20 minutes

PS024

Fanuc Alarm PS024 - Canned Cycle Parameter Error

Canned Cycle Error

Root Cause Summary

PS024 alarm occurs when a canned cycle (G73, G74, G76, G80-G89) is executed with missing, conflicting, or out-of-range address parameters. The Fanuc control detects invalid Q, R, P, or axis position values that violate canned cycle syntax rules defined in parameters 5101-5109 and 5114-5149.

Safety

Verify cycle parameters before running

Causes and Fixes

1
Review the program block at alarm occurrence. Verify G73/G74/G76/G81-G89 contains all mandatory addresses: R (retract plane), Z (final depth), and F (feedrate). For G83/G73 ensure Q (peck depth) is specified.
2
Check SYSTEM > PARAM > 5107 bit 0 (RPC). When set to 1, R-point must be specified in every canned cycle block. If set to 0, R is modal. Verify program syntax matches this setting.
3
Verify Q-value is positive and non-zero for peck drilling cycles. Check parameter 5114 (minimum peck increment) - Q must be greater than this value if set.
4
Confirm R-plane value is positioned correctly relative to Z-depth based on drilling direction. In G98/G99 mode, ensure initial Z-position, R-point, and final Z create valid geometry per parameter 5101 (drilling axis selection).

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