230-04F1

Access Machine Parameters

Press MOD key, select 'Machine Parameters', navigate to the affected axis parameters. Identify the axis number from the alarm details.

Use the search function in machine parameters (press '?' key) to quickly jump to MP1010 for the specific axis.

Check MP1010 Lag Error Limit

Review MP1010.x (where x = axis number) for maximum permissible following error. Standard values are typically 5-20mm for linear axes, 0.5-2° for rotary axes. Note the current value.

Do not increase lag error limits without understanding drive tuning - excessive values compromise crash protection.

Verify MP1011 Monitoring Time

Check MP1011.x monitoring time window. This should typically be 50-200ms. Ensure this value is not set too short relative to the lag error limit and axis dynamics.

The monitoring time must allow for normal following error during acceleration - calculate using: time > (MP1010 / max_velocity) * 2

Correct Parameter Relationship

Adjust parameters to compatible values. If MP1010 is large, MP1011 must allow sufficient time for monitoring. Typical ratio: for MP1010=10mm and feed rate 10m/min, MP1011 should be minimum 100ms.

Consult machine manufacturer's parameter documentation - these values are machine-specific and should match the original commissioning setup.

Check MP1020 Position Window

Access machine parameters and locate MP1020.x for the affected axis. This defines the position window for standstill monitoring, typically 0.5-2.0mm for linear axes.

Setting MP1020 too large can mask position instability; too small may cause nuisance alarms during thermal expansion.

Verify Against Encoder Resolution

Ensure MP1020 value is at least 10x the encoder resolution. Check encoder type in MP100.x and calculate minimum permissible window. For a 1µm encoder, minimum window should be >0.01mm.

The position monitoring window must be compatible with actual servo stability - monitor position display in Manual mode to see typical standstill deviation.

Check MP1025 Monitoring Time

Review MP1025.x which defines how long the axis must remain outside the position window before alarm. Typical value is 500-1000ms. Ensure this is not set to zero or excessively long (>5000ms).

MP1025 prevents false alarms from brief position deviations - should be longer than typical servo settling time after motion stop.

Restore Default Values

If parameters are corrupted, restore Heidenhain default: MP1020=1.0mm and MP1025=1000ms, then fine-tune based on machine behavior and manufacturer specifications.

Document original values before changes - keep a parameter backup file on USB for easy restoration.

Review Velocity Related Parameters

Check MP1300.x (maximum axis velocity) and related velocity monitoring parameters. Ensure monitoring thresholds do not exceed 110% of MP1300 value.

Access the axis diagnostic screen (Operating Mode > Manual > Axis Status) to view real-time velocity values for comparison.

Check Acceleration Monitoring

Verify MP1310.x (maximum acceleration) is compatible with velocity limits. Calculate if deceleration monitoring allows sufficient time: time = velocity / acceleration.

Incorrect acceleration limits can cause mid-motion alarms during rapid traverse - always test with reduced override after parameter changes.

Validate Against Drive Configuration

Access drive parameters via MOD > Drive Parameters. Verify that monitoring thresholds in TNC do not exceed drive-side velocity and acceleration limits configured in the inverter.

Drive parameters and TNC parameters must be harmonized - the more restrictive limit will govern, but mismatches trigger configuration errors.