Counter Input:Position:Decoding Type Property

DAQmx - Data Acquisition VIs and Functions

Edition Date: January 2019

Part Number: 370469AP-01

»View Product Info
Download Help (Windows Only)

Short Name: CI.Encoder.DecodingType

Property of DAQmx Channel

Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. Two Pulse Counting is valid for two-pulse encoders only.

X2 and X4 decoding are more sensitive to smaller changes in position than X1 encoding, with X4 being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if vibration exists in the encoder or other noise exists in the signals.

X1 (10090) If signal A leads signal B, count the rising edges of signal A. If signal B leads signal A, count the falling edges of signal A.
X2 (10091) Count the rising and falling edges of signal A.
X4 (10092) Count the rising and falling edges of signal A and signal B.
Two Pulse Counting (10313) Increment the count on rising edges of signal A. Decrement the count on rising edges of signal B.

Remarks

The following table lists the characteristics of this property.

Permissionsread/write
Resettableyes
Settable while task is runningdevice-specific
Available in Run-Time Engineyes

WAS THIS ARTICLE HELPFUL?

Not Helpful