NI9401 Pulse Generation and Digital Output same time

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Tugrul Öztürk 2023-3-18

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https://ww2.mathworks.cn/matlabcentral/answers/1931025-ni9401-pulse-generation-and-digital-output-same-time

评论： Pietro Mele 2024-7-5

Hey all,

I want to drive a stepper controller (TRINAMICS) using the NI 9401. I know that NI 9401 is capable of generating pulse which can be used for the "CLK" resp. "STEP" signal for the stepper controller. Beside the CLK signal I also have to provide digital signals for "DIR" (direction) and "EN" (enable). Is it possible to generate pulsed signal and "constant" digital output signals same time using the NI 9401 ?

My recent approach is attached below, which is not working.

Thank you !

close all;
clear;
clc;
devID_NI9401="cDAQ1Mod1";
daqObj=daq('ni');
chCLK=addoutput(daqObj,devID_NI9401,"ctr0","PulseGeneration");
chCLK.Frequency = 1000;
chCLK.DutyCycle = 0.5;
chDO=addoutput(daqObj,devID_NI9401,"port0/line2","Digital");
write(daqObj,ones(500,1));
start(daqObj,"continuous")

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Pooja Kumari 2023-8-28

What is the error you were facing?

Pietro Mele 2024-7-5

Hi @Tugrul Öztürk did you finally solved the problem? I'm currently facing the same issue, emoploying the NI 9401 for controlling a step motor with Simulink. Is it possible to use multiple ports for DO ?

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