ER03

PROGRAM SIZE ERROR(OPTION)

Fanuc · Series 0i-D/0i Mate-D Maintenance

What does ER03 mean?

This Fanuc Series 0i-D/0i Mate-D PMC alarm indicates that the sequence program's size exceeds the limits specified by the currently active ladder step count option. This makes the sequence program invalid.

Common Causes

  • The sequence program's step count exceeds the activated ladder step count option.
  • An incorrect or insufficient ladder step count option is specified or installed.
  • Recent program modifications increased the size beyond the current option's capacity.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Review and optimize the sequence program to reduce its step count, removing any unnecessary logic or redundant sections.

  2. 2

    Verify the current ladder step count option installed on the PMC and confirm it aligns with the program's requirements.

  3. 3

    Check if a different, larger capacity ladder step count option is available for installation or activation.

  4. 4

    If the program cannot be reduced further and the current option is insufficient, consult FANUC for upgrading the ladder step count option.

  5. 5

    Ensure that the PMC programmer used to create or load the sequence program is configured for the correct PMC type and option.

Browse all codes in this manual (60)
Verified technical data. Last updated: March 2026

Related Faults

Source: Fanuc Series 0i-D/0i Mate-D Maintenance