Fixed offset

  • Menu: 4.4.18-1.5-1
  • Index: 8518.5

Description

The offset between the rotor position and encoder can be set to a fixed value if it is possible to ensure that the same initial position of the motor is always used.

SEW-EURODRIVE recommends using this parameter in the following cases:

  • When using a linear motor with an encoder without absolute positioning
  • When using a rotating motor with an encoder without absolute position based on one motor revolution

To determine the fixed offset, do the following:

  1. Set the Use fixed offset memory parameter to 0 (No).
  2. Move the drive to the initial position.
  3. De-energize the inverter (line voltage and DC 24 V supply voltage) and then switch the inverter on again.
  4. Set the Operating mode parameter to Manual.
  5. Perform FCB 18. Manually enter the determined value (Measured encoder offset parameter) in the Fixed offset parameter.
  6. Set the Use fixed offset memory parameter to 1 (Yes).
  7. Set the Operating mode parameter to Automatic.

The following parameters are set:

Parameter

Meaning

Use fixed offset memory

Specifies whether the fixed offset is used.

Fixed offset

Fixed offset specified by the user (for example the value determined based on the step instructions).