Tyracont VD14-4 channel controller for vacuum transducers

[chispi23]

Hello,

I am trying to connect to a Thyracont VD14 4-channel vacuum controller (VCL Smartline), but I’m not getting any response from the device when running my LabVIEW VI (attached).

Could you please advise what might be wrong?

Thank you,
Chispi

[Bob_Schor · Accepted solution]

"Experienced" LabVIEW users (meaning those who've used LabVIEW for >5 years) might not be using the "latest" version, hence cannot open your ReadPressure.vi saved with LabVIEW 2025.  Open your VI and choose "Save for Previous Version" and choose, say, LabVIEW 2021.

Bob Schor

[chispi23]

Hello Bob, 

Thanks a lot for taking the time to check the .vi and sorry for the inconveniences. 

I think i have now uploaded the version you were mentioning. 

regards, 

Chispi

[GerdW · Accepted solution]

Hi chispi,

---

@chispi23 wrote:

Could you please advise what might be wrong?

---

I guess your checksum calculation is wrong!

One example in the manual is "0010MV00D\r", while you send "0010M100D\r". Did you (re)calculate the checksum as described in the manual (chapter 2.6)???

There are surely better ways to parse the device response instead of searching for some alphanumeric chars…

[chispi23]

Hi GerdW, 

Thanks a lot for your help. It does work with your recommendations. I guess i should check the checksum. 

I am quite new, following your recomendations i have implemented a different ways to parse the devise response, i have used

-  String Subset

and 

- Scan From String. 

Best regards, 

Chispi