PS022

Review the alarmed program block shown on the CRT screen. Identify the G02 or G03 command and verify if R or I/J/K values are present in the same block or modal from previous blocks.

Edit the program block to include either R (radius value) for simple arcs, or I/J/K (incremental distances from arc start to center in X/Y/Z respectively) for more complex circular paths.

Verify parameter 3450 (G code system selection) to ensure correct circular interpolation format is being used. Bit settings affect whether IJK are incremental or absolute.

Reset the alarm using RESET key after correcting the program, then perform a dry run or single block execution to verify the corrected circular interpolation block.

Check if the alarmed block contains optional block skip (/) at the beginning. Verify parameter 3404 bit 3 (optional block skip) status and ensure critical arc parameters are not being skipped.

If using macro variables (#variables) to define R or I/J/K values, navigate to OFFSET/SETTING > MACRO > VARIABLE screen and verify the assigned variable numbers contain valid non-zero values.

Review parameter 6001-6008 (macro variable range settings) to ensure macro variables used for arc definitions are properly configured and within valid ranges.

Modify the program to use direct R or I/J/K values instead of conditional logic for critical arc definition, or add error checking in the macro program before circular interpolation commands.

Verify the active plane selection before the G02/G03 command. Navigate to POSITION > PROGRAM screen and check current modal G-codes. Ensure G17 (XY), G18 (ZX), or G19 (YZ) is active.

Check parameter 3402 bit 0 (plane selection modal) to confirm proper modal retention. Add explicit G17/G18/G19 command before circular interpolation blocks if necessary.

Review the program structure for M02/M30 or mode changes that may reset modal conditions. Ensure arc definition matches the active plane: I/J for G17, I/K for G18, J/K for G19.