098

Identify the line number and program being executed when the alarm occurred from the control display or alarm history.

Check the M98 or M198 subprogram call in the active program and note the called program number (e.g., M98 P1234 calls O1234).

Press the PROG key and search for the called program number in the program directory to verify if it exists in memory.

If missing, transfer the required subprogram to the control via RS232, USB, network, or drip feed, ensuring the O-number matches exactly.

Verify program format and syntax before transferring to avoid additional errors.

Review the M98/M198 line syntax carefully. Standard format is M98 P[program#] or M98 P[reps][program#] (e.g., M98 P31234 = 3 reps of O1234).

Verify the program number does not exceed the control's maximum allowable program number (typically O0001-O9999, but check parameter 3107 for upper limit).

Check for leading zeros or formatting inconsistencies between the call and actual program number (O0100 vs O100 may cause issues on some controls).

Edit the program call to match the exact format and number of the existing subprogram, then reset the alarm and restart.

Always make a backup before editing part programs.

Verify the external device (memory card, USB) is properly seated and recognized by the control (check I/O device status on diagnostics screen).

Do not remove memory cards while machine is powered on to avoid file corruption.

Check parameters 20, 21, and 3107 to confirm external program search settings and device assignment are correctly configured.

Verify the file path and program naming convention on the external device matches the control's requirements (8.3 DOS format for older controls).

Test by transferring the program to internal memory temporarily, or reload the external device with properly formatted programs.

Check available memory capacity before transferring large programs internally.