valve actuation

[Dennis_Knutson]

That's just another value that you read from the file. Probably just need to wire that to a Delay function. Use the error in/error out connections to control the order of the code (i.e. if you want the delay before or after the DAQmx Write.

You said you had used LabVIEW before but my guess is that you really haven't used it more than a couple of days. Try the tutorials.

[Cheebers]

Thanks. Ill finish the tutorials and then Ill get back to you

[Cheebers]

 Thanks for recommending the tutorial. I learned alot of Labview functions especialy how to debug VI's. I managed to build a block diagram for my valve sequence. It works. I attached the VI and text file. Feel free to give me any advice to improve the code. Once again Thank you

[Dennis_Knutson]

Here's something just a wee bit simpler.

[Dennis_Knutson]

Forgot to mention that I changed the text file to have all columns separated by a single tab. Much, much easier to read that way.

[Cheebers · Accepted solution]

Wow. That is much eaiser than mine. I guess my block diagram helped me visualize what I was trying to do. Thanks for the help 🙂 problem solved!!

[jmoya]

Hello,
As happened to Cheebers, I am a user of Labview but not an expert. I have a USB-6525 DAQ and I just want it to work as a relay, opening and closing a gate as shown in the manual of the DAQ (se attached). But I not find the solution. Iownload the ".vi" that Cheebers and Knutson did,and it sems the software works well on my PC, no error on the card is reveal by message but I can't "see" that the terminal closes.

I'm connecting the wires of the load in P0.0A and P0.0B terminal and controling if they close (when runing the "Simpler LED Control .vi"for example) using a multimeter. How do I make this simple instruction in Labview? i.e. opening and closing P0.0B P0.0A terminals (as I can and check for continuity in the multimeter)?

Thanks very much

[Jake_G]

Hey jmoya,

The relay in the 6525 is normally open, so make sure you are checking the high and low states. 

You may try something simpler than a spreadsheet just to be certain.

Also, the knowledgebase article located here has some information on what you are trying to do.