Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-60 minutes

Alarm 300770

Siemens 840D 300770 - Clear alarm with the RESET key in all channels. Restart part program.

The calculated filter coefficients of a bandstop filter are beyond the range of the internal format. The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY (channel not ready).

Siemens SINUMERIKServo/AxisIntermediate30-60 minutes

300770

Siemens 840D 300770 - Clear alarm with the RESET key in all channels. Restart part program.

Clear alarm with the RESET key in all channels. Restart part program.

The calculated filter coefficients of a bandstop filter are beyond the range of the internal format. The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY (channel not ready).

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Bandstop filter coefficients exceed internal floating-point representation limits due to extreme frequency or attenuation parameters
  • Incorrect filter configuration or parameter entry in channel-specific filter settings
  • Corrupted or outdated machine data related to filter definitions
  • Numerical instability from cascaded filter stages or conflicting filter parameters across channels

Troubleshooting Steps

  1. 1Press RESET key on all affected channels to clear the alarm, then restart the part program to verify if the condition is transient
  2. 2Review and validate all bandstop filter parameters in the machine data, checking frequency range, Q factor, and attenuation values against system specifications
  3. 3Check MD ALARM_REACTION_CHAN_NOREADY to confirm alarm reaction is appropriately configured and adjust if necessary to allow channel recovery
  4. 4If filter parameters are correct, reload or reinitialize the filter coefficient tables through system diagnostics or backup/restore procedures
  5. 5Contact Siemens support with filter parameter details if coefficients are within documented ranges but alarm persists

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