Hi, all,
When I want to use MATLAB (R2022b-academic use) to control NI-USB 4431 to acquire data, the command window shows "Not all channels support on-demand operations. Only clocked operations are allowed." What does this mean? I can’t figure out how to solve it (I have installed NI-DAQmx toolbox, version 22.2.0). Here is the code:
dq = daq("ni");
dq.Rate = 8000;
ch1 = addinput(dq, d.DeviceID, "ai1", "Voltage");
tabledata = read(dq)

In addition, the NI-4431 device information is as follows.
ni: National Instruments(TM) USB-4431 (Device ID: ‘Dev1’)
Analog input supports:
-10 to +10 Volts range
Rates from 1000.0 to 102400.0 scansc
4 channels (‘ai0′,’ai1′,’ai2′,’ai3’)
‘Voltage’,’Accelerometer’,’Microphone’,’IEPE’ measurement types

Analog output supports:
-3.5 to +3.5 Volts range
Rates from 800.0 to 96000.0 scansc
1 channel (‘ao0’)
‘Voltage’ measurement type

Thanks!Hi, all,
When I want to use MATLAB (R2022b-academic use) to control NI-USB 4431 to acquire data, the command window shows "Not all channels support on-demand operations. Only clocked operations are allowed." What does this mean? I can’t figure out how to solve it (I have installed NI-DAQmx toolbox, version 22.2.0). Here is the code:
dq = daq("ni");
dq.Rate = 8000;
ch1 = addinput(dq, d.DeviceID, "ai1", "Voltage");
tabledata = read(dq)

In addition, the NI-4431 device information is as follows.
ni: National Instruments(TM) USB-4431 (Device ID: ‘Dev1’)
Analog input supports:
-10 to +10 Volts range
Rates from 1000.0 to 102400.0 scansc
4 channels (‘ai0′,’ai1′,’ai2′,’ai3’)
‘Voltage’,’Accelerometer’,’Microphone’,’IEPE’ measurement types

Analog output supports:
-3.5 to +3.5 Volts range
Rates from 800.0 to 96000.0 scansc
1 channel (‘ao0’)
‘Voltage’ measurement type

Thanks! Hi, all,
When I want to use MATLAB (R2022b-academic use) to control NI-USB 4431 to acquire data, the command window shows "Not all channels support on-demand operations. Only clocked operations are allowed." What does this mean? I can’t figure out how to solve it (I have installed NI-DAQmx toolbox, version 22.2.0). Here is the code:
dq = daq("ni");
dq.Rate = 8000;
ch1 = addinput(dq, d.DeviceID, "ai1", "Voltage");
tabledata = read(dq)

In addition, the NI-4431 device information is as follows.
ni: National Instruments(TM) USB-4431 (Device ID: ‘Dev1’)
Analog input supports:
-10 to +10 Volts range
Rates from 1000.0 to 102400.0 scansc
4 channels (‘ai0′,’ai1′,’ai2′,’ai3’)
‘Voltage’,’Accelerometer’,’Microphone’,’IEPE’ measurement types

Analog output supports:
-3.5 to +3.5 Volts range
Rates from 800.0 to 96000.0 scansc
1 channel (‘ao0’)
‘Voltage’ measurement type

Thanks! ni-daqmx, acquire data, addinput MATLAB Answers — New Questions

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