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Siemens SINUMERIK Controller
Servo/Axis · Basic · 5-10 minutes
Siemens 4010 - Invalid identifier used in machine data [ ]
SINUMERIK alarm 4010 occurs when the NC kernel attempts to execute a new motion command while the axis state machine still indicates ACTIVE status from a previous move. This protection mechanism prevents overlapping motion commands that could cause mechanical damage or position loss in the SINUMERIK control system.
4010
Siemens 4010 - Invalid identifier used in machine data [ ]
Invalid identifier used in machine data
When determining a name in the NCK tables (arrays) for: machine axes, Euler angles, direction vectors, normal vectors, interpolation parameters and intermediate point coordinates, one of the following syntax rules for the identifier to be entered has been violated: - The identifier must be an NC address letter (A, B, C, I, J, K, Q, U, V, W, X, Y, Z), possibly with a numerical extension (840D: 1-99) - The identifier must begin with any 2 capital letters but not with $ (reserved for system variables). - The identifier must not be a keyword of the NC language (e.g. POSA) Control reaction: NC not ready. Mode group not ready, also effective for single axes. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm.
Root Cause Summary
SINUMERIK alarm 4010 occurs when the NC kernel attempts to execute a new motion command while the axis state machine still indicates ACTIVE status from a previous move. This protection mechanism prevents overlapping motion commands that could cause mechanical damage or position loss in the SINUMERIK control system.
Safety
- Only qualified personnel should diagnose and clear control alarms; follow the machine builder's safety procedures and lockout/tagout where hardware work is required.
Causes and Fixes
- 1
Check Axis State in Diagnostics
Navigate to Diagnostics > Service > Axis States and verify current axis status shows STOPPED before next motion command.
Use MD32410 (AXIS_MOVEMENT_STATE) to monitor real-time axis state transitions
- 2
Insert G4 Dwell Commands
Add G4 P100 (100ms dwell) between rapid motion changes, especially after G0 positioning moves before G1 interpolation.
Start with 50-100ms dwell and adjust based on machine dynamics
- 3
Verify Motion Completion Settings
Check MD32200 (POSCTRL_GAIN) and MD32810 (STANDSTILL_DELAY_TIME) for proper axis settling parameters.
Incorrect positioning gain can cause oscillation and delayed motion completion
Call a technician if:
- ·DRIVE-CLiQ hardware errors persist
- ·Servo parameters require modification
- ·Mechanical binding suspected
Prevention
- Use M116 synchronization before critical moves
- Implement proper G4 dwell times in rapid motion sequences
- Regular DRIVE-CLiQ connection inspection
- Monitor axis reference status in daily startup routine
Common Mistakes
- Removing all dwell commands to reduce cycle time
- Ignoring intermittent reference point warnings
- Modifying servo timing without understanding system impact
- Using emergency stop as normal program stop
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