Sinumerik Alarm 300787 Axis %1 drive %2 asynchronous mode: feedforward control gain out of range
Parameters:
%1 = NC axis number
%2 = Drive number
Definitions:
If motor inertia and motor nominal torque have been selected unfavorably, the asynchronous motor feedforward control gain is beyond the range of the internal number format. The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY (channel not ready).
Reactions:
– NC not ready.
– Channel 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.
• Operation without encoder: Reduce the number of encoder lines in MD 1005: $MD_ENC_RESOL_MOTOR (encoder resolution for motor measuring system), since this has an impact on the internal number format.
• Optional/additional measure: see operation with encoder
• Operation with encoder: Reduce speed controller cycle MD 1001: $MD_SPEEDCTRL_CYCLE_TIME (speed controller cycle).
Program Continuation:
Clear alarm with the RESET key in all channels. Restart part program.
References
- Siemens Diagnostics Guide by Siemens