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Heidenhain Controller
Parameter · Intermediate · 30-120 minutes
HEIDENHAIN 231-9420 - 9420 Configuration of X150 not possible
Alarm 231-9420 occurs when the GenDriveOffGroup parameter configuration for X150 axis group emergency stop is invalid or corrupted. This typically happens during machine parameter setup or after parameter modifications where the axis grouping for emergency stop functionality is incorrectly defined.
231-9420
HEIDENHAIN 231-9420 - 9420 Configuration of X150 not possible
9420 Configuration of X150 not possible
This TNC 640 error indicates invalid machine parameter settings. The control has detected configuration data that does not match the hardware setup.
Root Cause Summary
Alarm 231-9420 occurs when the GenDriveOffGroup parameter configuration for X150 axis group emergency stop is invalid or corrupted. This typically happens during machine parameter setup or after parameter modifications where the axis grouping for emergency stop functionality is incorrectly defined.
Safety
- Refer to Heidenhain service manual
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Access Machine Parameters
Press MOD key, select 'Machine Parameters' menu, navigate to CfgAxes section to view current axis configuration.
Always backup current parameters before making changes using the parameter export function.
- 2
Check GenDriveOffGroup Setting
Locate GenDriveOffGroup parameter and verify the axis group numbers match existing configured axes (typically 1-9 for standard configurations).
Incorrect axis grouping can affect emergency stop functionality and machine safety.
- 3
Correct Parameter Value
Enter valid axis group number corresponding to configured axes, save parameters, and perform control restart to activate changes.
Call a technician if:
- ·Hardware damage to X150 connector
- ·Repeated parameter corruption
- ·Safety system malfunction
Prevention
- Regular parameter backups
- Proper cable management for X150 connections
- Systematic parameter change documentation
Common Mistakes
- Not backing up parameters before changes
- Ignoring axis numbering sequence
- Mixing up emergency stop group assignments
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Always verify with your machine manual or a certified technician before performing service procedures.