Elmo DSP 402 Interpolated Position, 12.1General Information, 60C0h Interpolation sub mode select

Models: DSP 402

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12: Interpolated Position

CANopen DSP 402 Implementation Guide

MAN-CAN402IG (Ver. 1.2)

81

12: Interpolated Position

60C0h: Interpolation sub mode select

60C1h: Interpolation data record

60C2h: Interpolation time period

60C3h: Interpolation sync definition

60C4h: Interpolation data configuration

12.1General Information

Interpolated Position mode is used to control multiple coordinated axles or a single axle with the need for time-interpolation of set-point data. The mode normally uses time synchronization mechanisms like the sync object for a time coordination of the related drive units.

The interpolation data record contains the interpolation data; the data type and the data size of the sub-indices of this structure are according to the sub-mode, as described in object 0x60C0. For all cases of motion, the interpolation cycle time is defined by the object interpolation time period. Time synchronization can be performed by the Sync message defined in DS301 (refer to the Elmo CANopen Implementation Guide).

Interpolated Position mode allows a host controller to transmit a stream of interpolation data with an explicit time reference to the drive. The Elmo drive supports an input buffer that allows the interpolation data to be sent in bursts rather than continuously in real time. The actually available and the maximum size of the input buffer can be requested by the host using the interpolation data configuration. The buffer size is the number of interpolation data records that may be sent to a drive to fill the input buffer; it is not the size in bytes.

The interpolation algorithm is defined in the interpolation sub mode select. Linear interpolation is the default interpolation method. For each interpolation cycle, the drive calculates a position demand value by interpolating interpolation data over a period of time.

Limit functions of speed acceleration deceleration and position are applied to the interpolation data.

Internal states

The interpolated position mode is controlled by the bits of the controlword and statusword.

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Elmo DSP 402 manual Interpolated Position, 12.1General Information, 60C0h Interpolation sub mode select