MATLAB: What is the unit of Rate on MATLAB

data acquisitionData Acquisition ToolboxMATLAB

Regarding the valiable "Rate" on MATLAB, what is the unit of it?

Following the MATLAB Document Page, it says that " Rate of operation in scans per second".

What does the operation mean and what is its unit?

sample program

In this case, 10000 what?

s = daq.createSession('ni');
addAnalogInputChannel(s,'cDAQ1Mod1','ai1','Voltage');
s.Rate = 10000

Best Answer

The rate is scans per second. One scan is reading all of the channels once. You can also use the term samples per second as long as it is understood that a "sample" includes all channels.

Related Solutions

MATLAB: How to read from multiple modules on a compactDAQ using the DAQ Toolboox

There are two interfaces for data acquisition. The older Session interface and the new DataAcquisition interface. In either case, you just add input channels to your session/daq object for each input and module.

For example, with the Session interface:

s = daq.createSession('ni');
addAnalogInputChannel(s, 'cDAQ1Mod1', 'ai0', 'Voltage');
ch = addCounterInputChannel(s, 'cDAQ1Mod2', 'ctr0', 'EdgeCount');
% ... add more input channels as needed

ch.Terminal % examine the terminal and wire to it accordingly

s.Rate = 10;
s.DurationInSeconds = 1;
data = startForeground(s);

While for the DataAcquisition interface:

dq = daq("ni");
addinput(dq, "cDAQ1Mod1", "ai0", "Voltage");
ch = addinput(d,"cDAQ1Mod5","ctr0","EdgeCount"); 
% ... add more input channels as needed
ch.Terminal % examine the terminal and wire to it accordingly
dq.Rate = 1000;
data = read(dq, seconds(5));

For a comparison, between the interfaces, see:https://www.mathworks.com/help/releases/R2020b/daq/transition-your-code-from-session-to-dataacquisition-interface.html

Best Answer

Related Solutions

MATLAB: How to read from multiple modules on a compactDAQ using the DAQ Toolboox

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