Sinumerik Alarm 300721 Axis %1 drive %2 zero-load current greater than rated motor current
Parameters:
%1 = NC axis number
%2 = Drive number
Definitions:
The no-load current of the motor (MD 1136: $MD_MOTOR_NOLOAD_CURRENT) has been set at a greater value than the rated current of the motor (MD 1103: $MD_MOTOR_NOMINAL_CURRENT).
Reactions:
– NC not ready.
– Channel not ready.
– NC Stop on alarm.
– NC Start disable in this channel.
– The NC switches to follow-up mode.
– Alarm display.
– Interface signals are set.
Remedy:
Please inform the authorized personnel/service department. For standard motors: Reset the drive (delete the bootfile) and repeat the startup. For third-party motors: Check and, if necessary, refer to the motor data sheet to correct machine data MD 1103: $MD_MOTOR_NOMINAL_CURRENT (rated motor current) and MD 1136: $MD_MOTOR_NOLOAD_CURRENT (motor no-load current).
Program Continuation:
Switch control OFF – ON.
References
- Siemens Diagnostics Guide by Siemens