Lifting application without encoder

ELSM®

Use of the drive unit in lifting applications with ELSM® control mode is not permitted.

V/f

SEW-EURODRIVE recommends that you do not use the drive unit in hoist applications with V/f control mode.

VFCPLUS

SEW-EURODRIVE recommends the following settings and control behavior for using the drive unit in lifting applications with the VFCPLUS control mode (without encoder):

Parameter settings:

  • For vertical drives, use the setpoint/stop function (FCB05 - speed control). Functions > Drive functions > FCB 05 Speed control > Stop by setpoint function > Activation = "1" (Yes).
    • Set the parameter Functions > Drive functions > FCB 05 Speed control > Stop by setpoint function > Stop setpoint so that the resulting motor speed is ≥ 1.5 × nominal slip of the motor.
    • As an alternative, set the parameter Functions > Drive functions > FCB 05 Speed control > Minimum speed so that the resulting motor speed is ≥ 1.5 × nominal slip of the motor.
  • Set the parameter Drive train > Drive train ASx > Controller > Control behavior > Flying restart = "0" (off).
  • Set the parameter Drive train > Drive train ASx > Controller > Control behavior > Flow optimization = "0" (off).
  • Set the parameter Drive train > Optimization ASx > VFCplus > Boost=10%.

Control behavior:

  • Design the control in such a way that a direction of rotation reversal is only possible in an idle state (with the brake applied).
  • If you want to change the direction of rotation without a standstill, use a drive with encoder.
  • Control the drive at a setpoint speed that corresponds to a speed ≥ 1.5 × nominal slip of the motor.