mdaqEncoderRead

Description

This function reads current value of quadrature encoder (ENC1, ENC2) position register on selected ENC module. Function returns current position and rotation direction. Value of direction indicates rotation direction (0 - no motion, 1 - CW, 2 - CCW).

The quadrature encoder pulse (ENC) module is used for direct interface with a linear or rotary incremental encoder to get position, direction, and speed information from a rotating machine for use in a high-performance motion and position-control systems.

Input arguments

• module: Quadrature encoder module (1|2)

Output arguments

• position: Current quadrature encoder position value

• direction: Current rotation direction (0 - no motion, 1 - CW, 2 - CCW)

Examples

% initialize quadrature encoder with 0 
mdaqEncoderInit(1, 0); 
% read quadrature encoder module 1
sprintf('Encoder position: %d\n', mdaqEncoderRead(1))

See Also

• mdaqEncoderInit