labview manual display problem

[zackhl]

i can display auto-display but can't get manual display. im using arduino to control the motor and labview to show the display. solar tracker project. added a snippet so someone can help me trouble shoot! 

[zackhl]

And my Visa read get 0.00 value , can't get any value on display manual. only automatic will other value number.

[GerdW]

Hi Zack,

I can't see any "manual display" or "automatic display" in your snippet.

Why do you use "Bytes at Port" when you have enabled the TermChar?

Why is there no wait between VISAWrite and VISARead when you use BytesAtPort?

[zackhl]

hi GerdW, im using a LCD on arduino board. it will only show at my lcd. erm i'm not so sure. im new in labview =(

[zackhl]

this is those thing im using 😃

[GerdW]

Hi zack,

you send some commands to your device and try to read it's answers. Check the manual for your device to use the correct commands and settings…

[zackhl]

still can't work. anyone can solve??

[Dennis_Knutson]

Your image of the hardware fours not help at all. Your image of the code does not show what commands you are sending in the True cases. You have not explained what is in your arduino code that detects s change to manual mode. Your LabVIEW is poorly written with that while loop that just constantly hammers the serial port by sending the same data over and over again.

Since the majority of the problem would appear to be with your sketch, I would recommend doing debug with the arduino development tool and posting to an arduino forum If you have problems. Once you have the serial communication working there, then you implement it in LabVIEW. Rewrite it with a better style. An Event Structure would be better.

[zackhl]

Thanks. I will go look at it tomorrow.

[zackhl]

hey Dennis_Knutson, how do you rewrite with a better event structure ? I'm very new to labview so i'm not sure how to do. can you do on the snippet i uploaded? thanks!