103016

Review the active NC program for G70 or G700 commands in the code that would switch to inch programming mode.

Verify this is intentional by checking if the part dimensions and feedrates in subsequent lines are programmed in inches rather than millimeters.

If the unit change is unintended, modify the program to remove G70/G700 or add G71/G710 to return to metric mode.

All dimensional values following a unit change must match the active unit system to avoid incorrect machining or collisions.

Acknowledge the alarm by pressing the acknowledgement key and continue operation if the unit change is correct.

Check machine data MD10240 (SCALING_SYSTEM_IS_METRIC) or channel-specific setting data SD42900 (WANT_INCH_PROG) for unexpected changes.

Unauthorized changes to machine data can affect all programs and should only be modified by authorized personnel.

Verify if a recent parameter backup was restored that may have changed the default dimension system settings.

If settings are incorrect, restore to proper values: SD42900=0 for metric programming as default.

Machine data changes require a control reset (NC Start disable) or power cycle to take effect.

Document any machine data changes in the service log and inform operators of the new default behavior.

Identify any CYCLE calls, subprogram calls (L-commands), or external subroutine invocations immediately before the alarm occurred.

Open and review the called subprograms or cycle definitions for G70/G700 commands that may be switching units internally.

Verify that the called routine properly restores the original dimension system (G71/G710) before returning to the main program.

Cycles that change modal states without restoring them can cause unexpected behavior in subsequent program code.

If necessary, modify the subprogram or add modal state restoration commands in the main program after the cycle call.