Hello, I need for my project to acquire three channel at different frequencies on two different devices CDAQ 9178 and NI USB 6009 using the following script:
Dev ='CDAQ2';
d1 = daq('ni');
% voltage acquisition
DevTot = [Dev,'Mod7'];
ch4= addinput(d1,DevTot,"ai0","Voltage");
d1.Rate=1000;
d2 = daq('ni');
% current acquisition
DevTot='Dev1';
ch6= addinput(d2,DevTot,"ai0","Voltage");
% current acquisition
DevTot = [Dev,'Mod5'];
ch7= addinput(d2,DevTot,"ai0","Voltage");
d2.Rate = 100;
daqDuration=10;
% %Configure the source data acquisition object to export a triggering signal on the PFI0 terminal of cDAQ2 chassis
addtrigger(d1, 'Digital', 'StartTrigger', 'cDAQ2/PFI0', 'External');
%Configure the destination data acquisition object to start acquisition when an external triggering signal is received at PFI0 terminal of Dev1 chassis
addtrigger(d2, 'Digital', 'StartTrigger', 'External', 'Dev1/PFI0');
%Configure the destination data acquisition object to start acquisition when an external triggering signal is received at PFI0 terminal of cDAQ2 chassis (different frequencies)
addtrigger(d2, 'Digital', 'StartTrigger', 'External', 'CDAQ2/PFI0');
start(d2, 'Duration', daqDuration)
while ~d2.WaitingForDigitalTrigger
pause(0.1)
end
start(d1, 'Duration', daqDuration)
%Wait until data acquisition is complete
while d1.Running || d2.Running
pause(1)
end
data1 = read(d1, 'all');
data2 = read(d2, 'all');
I'd like to ask if for the syncronization of these three channel I need only to connect the BNC terminal of the CDAQ 9178 with the port29 of the NI USB 6009 (PFI0).
