61331

Navigate to Diagnostics > Parameters > Machine Data and locate MD 32110 (MEASURING_AXIS_MAX_ANGLE) or search for measuring axis limits specific to the current channel. Document the maximum permissible angle value.

In the NC program, check the _STA parameter assignment in CYCLE998 call. Example: CYCLE998(AXIS=Z, _STA=95) may exceed a 90-degree limit. Reduce _STA to a value below the MD limit.

Reducing _STA may impact cycle performance; consult process documentation before modification.

If _STA cannot be reduced safely, select an alternative measuring axis with higher angular tolerance by modifying the AXIS parameter in CYCLE998 or switching to a different synchronized spindle axis.

Reset the channel alarm and rerun the block. Confirm alarm clears and cycle executes without interrupt.

Check Channel Parameters > Spindle Data and verify the active spindle axis name matches MD 37100. Cross-reference the measuring axis against the physical machine configuration and axis definition table in Siemens commissioning documentation.

Review the NC program CYCLE998 AXIS parameter. If AXIS=SPINDLE or AXIS=S, confirm that this spindle is the intended measuring axis. If geometry limits are restrictive, select an alternative synchronized axis (e.g., AXIS=C or AXIS=B) if available on the channel.

Validate measuring axis limits in HMI > Diagnostics > Actual Values and observe the current axis angle offset. If offset is near the maximum, switch to a secondary measuring axis with larger angular working range.

Test the modified CYCLE998 call on a dry-run cycle without load. Monitor alarm log (HMI > Diagnostics > Alarms) to confirm 61331 does not recur.

Perform a machine reference run (machine homing) for all synchronized and measuring axes via HMI > Manual > Reference Run or send G code G74 for measuring axis calibration. This resets the axis position counters and clears stale offset data.

Ensure machine is in safe state and all workpieces are removed before homing.

Navigate to Diagnostics > Actual Values and confirm the measuring axis displays 0.000 or the expected home position immediately after reference run. If offset values are erratic, check encoder connections and MD 32120 (MEASURING_AXIS_OFFSET) for consistency.

Clear the alarm history (HMI > Diagnostics > Alarms > Clear All) and retry the NC block containing CYCLE998. Observe if alarm 61331 reoccurs.

If alarm persists, contact Siemens field service to verify encoder signal integrity and recalibrate measuring axis parameters using the SINUMERIK Commissioning Tool or appropriate MD backup restoration.