61103

Review the NC program block containing the HOLES1 or HOLES2 call. Verify that NUM=<value> is explicitly programmed (e.g., HOLES1(NUM=8) for 8 holes).

If NUM is missing, add the parameter with the correct hole count value. NUM must be a positive integer greater than zero.

NUM=0 or negative values will trigger 61103; minimum value is NUM=1.

Verify the canned cycle syntax against the SINUMERIK 840D programming manual. Ensure all mandatory parameters (NUM, DEPTH, PITCH, etc.) are present in the correct order.

Retranslate and reload the NC program. Clear the alarm and re-run the block.

Check if NUM is defined as a variable or expression in the HOLES cycle call (e.g., NUM=&NumHoles or NUM=P1-P1).

Use the SINUMERIK 840D Diagnostics display (NCK → Alarms → 61103) to view the actual parameter values passed to the cycle. Enable cycle parameter tracing if available in your kernel version.

Verify that the variable is initialized before the HOLES cycle block and contains a valid positive integer. Trace variable assignments in the part program or calling subroutine.

Check MD18110 (cycle parameter handling) to confirm variable scoping rules in your SINUMERIK firmware version.

Modify the program logic to ensure NUM always receives a non-zero positive value before cycle invocation.

Verify the HOLES cycle definitions exist in the Siemens-supplied or custom cycle library. Check the NCK file system via HMI Diagnostics → File System → /user/ for _N_HOLES_1_SPF and _N_HOLES_2_SPF.

Compare your cycle source code against the original SINUMERIK 840D documentation or a known working backup. Look for missing parameter handling logic or incorrect NUM variable declarations.

Do not modify Siemens standard cycle files without documented change control. Restore from backup if corruption is suspected.

If using custom cycles, recompile and reload the cycle definition files to the NCK memory. Restart the CNC and test with a simple HOLES1(NUM=1) call.

Contact Siemens support with the exact firmware version (MD0 stamp) if cycle files cannot be recovered or if standard cycles are corrupted.