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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 101628 - Write access only in start-up state Motor (p10=3).
This alarm occurs when attempting to modify a write-protected motor parameter that can only be changed when the drive is in start-up mode (p10=3). The drive commissioning parameter p10 must be set to value 3 to enable write access to protected motor configuration parameters.
101628
Siemens 840D 101628 - Write access only in start-up state Motor (p10=3).
Write access only in start-up state Motor (p10=3).
Siemens SINUMERIK operator message 101628: Write access only in start-up state Motor (p10=3). This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.
Root Cause Summary
This alarm occurs when attempting to modify a write-protected motor parameter that can only be changed when the drive is in start-up mode (p10=3). The drive commissioning parameter p10 must be set to value 3 to enable write access to protected motor configuration parameters.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Access the drive system via STARTER or Scout commissioning software for the affected axis.
- 2
Navigate to parameter p10 (commissioning parameter) and verify current value. If p10=0 (normal operation), change to p10=3 (start-up mode).
Setting p10=3 disables drive enable - ensure machine is in safe state before proceeding
- 3
Modify the required motor parameter that triggered the alarm. Common protected parameters include p0304 (rated motor voltage), p0305 (rated motor current), p0307 (rated motor power), p0308-p0311 (motor connection type and ratings).
- 4
After parameter modification is complete, reset p10 back to p10=0 (normal operation) and perform a drive reset (POWER ON). Verify alarm clears and test axis movement.
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