Siemens SINUMERIK codes
AxisMD

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-120 minutes

Alarm 300756

Siemens 300756 - Axis drive speed hysteresis of setpoint current smoothing invalid

The value in MD 1246: $MD_CURRENT_SMOOTH_HYSTERESIS (hysteresis of the speeddependent M setpoint smoothing) is greater than or equal to the value in MD 1245: $MD_CURRENT_SMOOTH_SPEED (threshold of the speed-dependent M setpoint smoothing) Control reaction: NC 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.

Siemens SINUMERIKServo/AxisIntermediate30-120 minutes

300756

Siemens 300756 - Axis drive speed hysteresis of setpoint current smoothing invalid

Axis drive speed hysteresis of setpoint current smoothing invalid

The value in MD 1246: $MD_CURRENT_SMOOTH_HYSTERESIS (hysteresis of the speeddependent M setpoint smoothing) is greater than or equal to the value in MD 1245: $MD_CURRENT_SMOOTH_SPEED (threshold of the speed-dependent M setpoint smoothing) Control reaction: NC 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.

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.

Common Causes

  • The value in MD 1246: $MD_CURRENT_SMOOTH_HYSTERESIS (hysteresis of the speeddependent M setpoint smoothing) is greater than or equal to the value in MD 1245: $MD_CURRENT_SMOOTH_SPEED (threshold of the speed-dependent M setpoint smoothing)

Troubleshooting Steps

  1. 1Please inform the authorized personnel/service department.
  2. 2Check and, if necessary, correct the torque adaptation factor MD 1246: $MD_CURRENT_SMOOTH_HYSTERESIS (hsyterisis of the speed-dependent M setpoint smoothing) or MD 1245: $MD_CURRENT_SMOOTH_HYSTERESIS (threshold of the speed-dependent M setpoint smoothing). $MD_CURRENT_SMOOTH_SPEED.
  3. 3Clear alarm with the RESET key in all channels. Restart part program

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