PS0043

Press ALARM key on MDI panel, note the exact program block number (N-number or sequence) and G-codes listed in the alarm message detail.

Press EDIT mode, navigate to PROGRAM > search to problematic block. Identify all G-codes in that block and verify modal group assignments using Fanuc Programming Manual Section 4 (G-Code List by Modal Group).

Separate conflicting G-codes into consecutive blocks. For example, change 'N100 G00 G01 X100.0 F500' to 'N100 G00 X100.0' and 'N101 G01 F500'. Ensure each block contains only one G-code per modal group.

Reset alarm using RESET key, return to MEM or AUTO mode, and re-execute program from block search or program restart to verify correction.

Locate alarmed block in EDIT mode. Check for multiple Group 09 codes (drilling/boring cycles) or Group 01 motion codes (G00/G01/G02/G03) commanded with active canned cycle without G80 cancel.

Insert G80 (canned cycle cancel) in separate block before changing to different cycle or motion type. Example: 'N200 G80' before 'N201 G83 Z-50.0 R5.0 Q5.0 F200' if previous cycle was G81.

Verify parameter 5101 bit 1 (GCD) is set correctly for your machine type. Navigate to SYSTEM > PARAM > search 5101. Bit 1=0 allows some cycle overlaps, bit 1=1 enforces strict modal separation.

Changing parameter 5101 requires parameter write enable (PWE) switch and may affect all programs. Consult machine builder documentation.

Clear alarm with RESET, perform dry run (DRY RUN button + SINGLE BLOCK) to test corrected canned cycle sequence block-by-block before full execution.

In EDIT mode, examine macro call block and subprogram definition. Check variable assignments (e.g., #100=#101) that substitute into G-code addresses. Use SYSTEM > MACRO VARS to display current #variable values at alarm occurrence.

Add conditional logic (IF/GOTO statements) in macro to ensure only one G-code per modal group is generated per block. Use separate blocks for G-code mode changes within macro programs.

Enable parameter 6036 (macro program trace) by navigating SYSTEM > PARAM > 6036 and setting to 1. Re-run program in SINGLE BLOCK to trace exact G-code expansion in each executed block on CURRENT PROGRAM screen.

Parameter 6036 trace mode significantly slows execution. Disable after diagnostics by setting parameter 6036=0.

Correct macro variable logic or add G80/modal reset codes between variable-generated G-code blocks. Clear PS0043 alarm with RESET and test macro with known variable values in MDI mode before AUTO execution.