Encoder coupling

Parameter designation

Description

Coupling monitoring between external encoder [A] and motor encoder [B]

Mechanical connection type

INFORMATION: See also Monitoring of encoder couplings.

Select the connection type of the encoder coupling. Depending on the selected value, additional settings fields are displayed.

  • Form closure – Use the parameters of the absolute error and warning windows. The configured values of these windows should be greater than the sum of encoder noise, encoder dead time, and backlash and spring movements.
  • Friction contact – In addition to the absolute error and warning windows, for couplings with slip, set the parameters for the slip error and slip warning window as well as for the slip period.

Default value: Friction contact

Index: 50013.27

IEC name: –

Absolute error window

Permitted difference between the mean position value of all motor encoders and the mean position value of all external encoders (in user units). To deactivate monitoring of the absolute error window, enter "0". For the configuration, it is recommended to perform a measurement run and read out the maximum value of the coupling error.

Default value: 0

Index: 50013.21

IEC name: Controller.EncoderEvaluation.Config.CouplingObserver.lrAbsoluteErrorDistanceWindow

Absolute warning window

Permitted difference between the mean position value of all motor encoders and the mean position value of all external encoders (in user units). To deactivate monitoring of the absolute warning window, enter "0".

Default value: 5 motor revolutions (in user units)

Index: 50013.22

IEC name: Controller.EncoderEvaluation.Config.CouplingObserver.lrAbsoluteWarningDistanceWindow

Slip error window

INFORMATION: Only visible if the mechanical connection type is "friction contact".

Allowed slip relative to the movement of the motor encoder up to the error message. To deactivate monitoring of the slip error window, enter "0".

Default value: 0%

Index: 50013.23

IEC name: Controller.EncoderEvaluation.Config.CouplingObserver.lrSlipRelationErrorWindow

Slip warning window

INFORMATION: Only visible if the mechanical connection type is "friction contact".

Allowed slip relative to the movement of the motor encoder up to the warning message. To deactivate monitoring of the slip warning window, enter "0".

Default value: 5%

Index: 50013.24

IEC name: Controller.EncoderEvaluation.Config.CouplingObserver.lrSlipRelationWarningWindow

Slip period

INFORMATION: Only visible if the mechanical connection type is "friction contact".

When the slip period has ended, the calculated current slip is reset. If the "Slip warning window" or "Slip error window" parameters are used, the slip period must be greater than 0. The recommended value is one tenth of a travel cycle (in user units).

The slip period is important in order to limit the maximum coupling error caused by slip.

See Monitoring of encoder couplings.

Default value: 50 motor revolutions (in user units)

Index: 50013.25

IEC name: Controller.EncoderEvaluation.Config.CouplingObserver.lrSlipDistancePeriod

Reset on restart

INFORMATION: Only visible in expert mode and when the mechanical connection type is "friction contact".

  • On: The encoder difference is reset when the MOVI-C® CONTROLLER is started up.
  • Off: The encoder difference must be reset manually via the "Delete distance" button of the optimization monitor, via the xDeleteDistance variable of the user interface, or via the process data of the higher-level controller (PD 10 bit 12).

Index: 50013.26 Bit0

IEC name: Controller.EncoderEvaluation.Config.CouplingObserver.xDeleteDistanceWithEnableEdge