How do I fix Siemens SINUMERIK alarm 300604?

1. For 1FN3 linear motors: Measure the rotor position offset to the EMF of the U_R phase and add it as commutation angle offset to MD 1016 $MD_COMMUTATION_ANGLE_OFFSET. 2. Then set MD 1017 $STARTUP_ASSISTANCE to "-1" to store the serial number of the Endat encoder. 3. Then save the bootfiles and execute an NCK Reset. 4. Otherwise: To determine the commutation angle offset in MD 1016, initiate the rotor position identifier via MD 1017 = 1. 5. After the error has been acknowledged, the identification is carried out. 6. Clear alarm with the RESET key in all channels of this mode group. Restart part program

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-120 minutes

Alarm 300604

Siemens 300604 - Axis drive motor encoder is not adjusted

This alarm occurs when the motor encoder's serial number does not match the active encoder data, indicating the encoder may not be properly adjusted or started with the motor. Correcting the encoder setup or program data resolves the issue.

Siemens SINUMERIKServo/AxisIntermediate30-120 minutes

300604

Siemens 300604 - Axis drive motor encoder is not adjusted

Axis drive motor encoder is not adjusted

The stored serial number of the encoder on a linear motor encoder with an EnDat interface does not match the number of the active encoder. It is therefore assumed that the encoder has not been started up with the motor in question before or has not been adapted to the motor Control reaction: Mode group not ready. The NC switches to follow-up mode. Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm. Channel not ready.

Root Cause Summary

Safety

Drive/power/encoder circuit: hazardous voltages may remain in the DC link after power-off. Lock out / tag out, wait for discharge per the drive documentation, and use qualified personnel only.

Causes and Fixes

1
SAFETY: Power down and lockout
Follow LOTO procedures. Power down the machine and ensure all energy sources are isolated before accessing drive configuration.
2
Check alarm details
Note the axis and drive number in the alarm message to identify the affected component.
3
Verify encoder setup
Access the drive configuration in the control and ensure the encoder data matches the motor. Check encoder serial number and parameter settings.
4
Restart system safely
Clear the alarm, restore power following proper startup procedures, and test at reduced speed initially.

Service Recommendedmedium confidence

Call a technician if:

·If encoder data cannot be matched after setup verification
·If alarm persists despite program corrections
·If encoder hardware inspection reveals damage
·If you are not trained in Siemens drive configuration
·If encoder recalibration is required

Prevention

Validate encoder setup during commissioning
Use simulation to test program references before execution

Common Mistakes

Overlooking axis/drive specifics in alarm message
Failing to update encoder data after hardware changes

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