One Task having both Analog Out and Analog input coltage channels

[Vincenttswong_]

Hi, am using USB6009.

Would like to create

1) Analog Out channel to output a predefined waveform

2) Analog Input channel to measure input voltage

Both channel 1 and 2 have to be started simultaneously.

I tried to create both channels(1 and 2) in a same task, but it prompt me error as below:

code:  -200559

message : Measurements: Task cannot contain a channel with the specified channel type, because the task already contains channels with a different channel type.
Create one task for each channel type.

What I would like to achieve here is to use channel (2) to measure signal from channel (1)

Question:

1) Can this be done in 6009?

2) If "No" for question (1), is there any other card(s) that I should choose?

Thanks.

Warmest regards,

Vincent

[JohnMc19]

Hi,

Having looked at your problem I don't think it is possible, you will have to create two seperate tasks for AI and AO.

A different thread here is similar to yours: link

It won't depend on what modules you use, just seperating the two tasks would solve this.

When it comes to starting them simultaneously:-

• Open LabVIEW > Help tab >> Find Examples...
• Expand the 'Hardware Input and Output' folder > DAQmx >> Synchronization >>> Multi-Functional
• Open the Multi-Function-Synch AI-AO.vi

This VI should help you out, let me know if you need anything else!

Regards,