Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-120 minutes

Alarm 300716

Siemens 300716 - Axis drive torque constant less than or equal to zero

This alarm occurs when the torque constant in drive MD 1113 is less than or equal to zero, or the ratio with motor pole pairs exceeds 70. Correct the drive parameters to resolve it.

Siemens SINUMERIKServo/AxisIntermediate30-120 minutes

300716

Siemens 300716 - Axis drive torque constant less than or equal to zero

Axis drive torque constant less than or equal to zero

1. The value in drive MD 1113: $MD_TORQUE_CURRENT_RATIO (torque constant) is less than or equal to zero. 2. The ratio of MD1113: $MD_TORQUE_CURRENT_RATIO (torque constant) / MD1112: $MD_NUM_POLE_PAIRS (motor pole pairs) is greater than 70 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.

Root Cause Summary

This alarm occurs when the torque constant in drive MD 1113 is less than or equal to zero, or the ratio with motor pole pairs exceeds 70. Correct the drive parameters to resolve it.

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. 1

    Access drive parameters

    Navigate to the drive configuration menu on the Siemens control.

  2. 2

    Check MD 1113 value

    Verify the value in $MD_TORQUE_CURRENT_RATIO and ensure it is greater than zero.

  3. 3

    Restart system

    Save changes, clear the alarm, and restart the system to apply settings.

DIY Feasiblehigh confidence

Call a technician if:

  • ·If parameter adjustments do not resolve the alarm
  • ·If unsure about correct parameter values for the motor

Prevention

  • Double-check drive parameters during setup
  • Refer to motor datasheet for correct values

Common Mistakes

  • Entering zero or negative values in MD 1113
  • Miscalculating the ratio with MD 1112

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