4215

Access Siemens SINUMERIK HMI > Diagnosis > Parameters > Machine Data (MD). Navigate to MD10200 (Axis name assignment) for the affected channel and verify that a modulo axis is declared (e.g., 'C' for C-axis). Check MD10210 (Axis type) to confirm the axis is defined as rotary (type 2 or 3).

Do not modify MD values during active machine operation; ensure the machine is in manual or diagnostic mode.

Verify spindle-to-axis linkage in channel-specific parameters: check MD14620 (spindle number assignment) and MD14630 (spindle modulo axis) for channel %1. Confirm that MD14630 references the correct modulo axis name (must match MD10200 declaration exactly, case-sensitive).

Mismatch between spindle assignment and modulo axis reference is a common configuration error.

If the modulo axis is missing entirely, create the axis declaration: in HMI navigate to Axis > New > define axis type as rotary with 360° modulo range. Assign it a unique axis name (e.g., 'C') and confirm MD10200 and MD10210 are populated. Then re-assign spindle modulo reference in MD14630.

After configuration changes, perform a machine data backup (via Data > Backup) and reload all parameters via NCK reset (menu > System > Reset NCK) or power cycle. Verify alarm clears and spindle positioning functions respond correctly in manual mode before resuming production.

In HMI Diagnosis > Parameters, navigate to MD14620 (Spindle number) and MD14630 (Spindle modulo axis) for channel %1. Verify that MD14630 is NOT empty and contains a valid axis name that exists in MD10200.

An empty or space-padded MD14630 entry will not trigger a syntax error but will cause alarm 4215 at runtime.

Cross-reference the modulo axis name in MD14630 against all declared axis names in MD10200 for the channel. Use Diagnosis > Axis List to view all active axes. If the axis name in MD14630 does not appear in this list, the axis declaration is missing.

Correct MD14630 to reference the proper modulo axis name (e.g., change blank or erroneous entry to 'C'). Verify spelling and case match exactly with MD10200. Save machine data and perform NCK reset.

Verify that the modulo axis exists globally: in HMI navigate to Diagnosis > Axis List and search for the axis referenced in spindle MD14630. Confirm it is active and has type 'rotary' with 360° modulo.

Check channel-specific axis assignment: in Parameters > MD, review MD10100 (Number of axes for channel %1) and the corresponding MD10200/MD10210 entries for that channel. If the modulo axis is not listed here, it exists globally but is not bound to channel %1.