PS009

Identify the exact program block causing the alarm by noting the sequence number displayed with PS009. Enter EDIT mode and navigate to the flagged N-number or O-program line.

Check for invalid address letters such as: A, B, C (rotary axes) if not configured in parameters 1022-1025; E (not used in standard Fanuc); or duplicate addresses in the same block. Verify against valid Fanuc addresses: G, M, X, Y, Z, A, B, C, U, V, W, I, J, K, R, F, S, T, D, H, P, Q, L.

Access SYSTEM > PARAM and verify parameter 1020 (axis configuration) matches the programmed axes. For 4th/5th axis programming, confirm parameters 1022-1025 enable the rotary axis address letters being used.

Changing axis parameters requires parameter write enable (PWE) bit 0 in setting and may require machine reboot.

Correct the invalid address letter in the program block, or if the address should be valid, enable it through the appropriate axis/function parameters and power cycle the control.

Navigate to the program line indicated in the alarm. Press EDIT > SEARCH and look for unusual symbols, spaces, or characters that appear garbled or abnormal between standard NC code.

Check file transfer settings if program was loaded via RS-232, CF card, or network. Verify ASCII transfer mode was used (not binary), and parameter 0020 bit 0 (TV check) is set appropriately. Check I/O channel parameters 100-109 for correct baud rate and parity.

Delete the corrupted program block and manually re-enter the line, or retransfer the program using verified DNC settings. If using Fanuc Ethernet, confirm parameter settings 904-907 match network requirements.

Verify CAM post-processor output does not include extended characters. Review post-processor configuration to ensure ISO/EIA Fanuc format output only, with no special formatting codes.

Review the program block syntax at the alarm location. Verify that addresses I, J, K are only used with G02/G03 circular interpolation or specific canned cycles (G70-G89 series). Check that P, Q, R addresses match the active G-code requirements per Fanuc programming manual.

Access SYSTEM > PARAM and check parameter 3405 (G-code system selection: A/B/C). Verify the programmed G-code addresses are valid for the active G-code system. Switching between type A/B/C changes permitted address usage.

Parameter 3405 change affects all G-code interpretation and requires control restart.

For custom macro programs, verify macro variable addresses (#) are not used incorrectly as standard addresses. Check parameter 6001-6055 for custom macro settings if using G65/G66 modal calls.

Correct the program block by removing the invalid address or adding the appropriate G-code/M-code that permits the address usage. Refer to Fanuc operator's manual section on address word definitions for the specific control series.