Connecting to NI cDAQ 9133 controller

Is it possible to connect to a NI remote system (cDAQ 9133) through MATLAB? getDevices returns no connected devices.

[Khanh Pham]

Hi Eric,

Do you have a solution for this problem?

Answer 1

[Anshuman]

The 'getDevices' function in MATLAB typically lists devices connected directly to your computer, so it won't automatically detect remote systems. Here’s how you can connect to a remote NI cDAQ system:

Make sure you have the MATLAB Data Acquisition Toolbox and NI-DAQmx driver installed on your system.

1. Use the Data Acquisition Toolbox to create a session and specify the vendor as 'ni'. Here's an example:

% Create a session
s = daq.createSession('ni');

2. Use 'addAnalogInputChannel', 'addAnalogOutputChannel', or similar functions to add channels to your session. You will need the device ID, which you can find in NI MAX.

% Example of adding an analog input channel
% Replace 'cDAQ1Mod1' and 'ai0' with your actual device and channel IDs
ch = addAnalogInputChannel(s, 'cDAQ1Mod1', 'ai0', 'Voltage');
% Use startForeground or startBackground to acquire data.
data = s.startForeground();
% inspect the results
disp(data);

Hope this helps!