Serial communication (Error -1073807202)

[Jousepa]

Hello, I have a KERN PCB 2000-1 scale and a KERN-KUP-03 TYKUP-03-A KUP;USB-DEVICE cable. When I communicate with the device using NI MAX / NI-VISA Interactive Control, I have no problem communicating with it. However, with this simple LabVIEW code, there’s no way — I get this error. I’ve already checked the VISA driver installation and they are installed. How can this be? Visa resource name is COM4 in LB and in Interactive panel is ASRL4::INSTR.

[UliB]

---

@Jousepa wrote:

 I’ve already checked the VISA driver installation and they are installed. How can this be?

---

From your description, it is not clear to me whether you followed the required installation sequence.

1. Install LabVIEW IDE

2. Install VISA

If you did it the other way around, LabVIEW may not recognize VISA.

[Jousepa]

Sorry, I don’t understand your response.

I’m only asking because I’m getting a VISA OPEN error, meaning a communication error, even though I’m able to connect in other ways such as NI MAX VISA Interactive Panel and even PuTTY.

[UliB]

---

@Jousepa wrote:

Sorry, I don’t understand your response.

I’m only asking because I’m getting a VISA OPEN error, meaning a communication error, even though I’m able to connect in other ways such as NI MAX VISA Interactive Panel and even PuTTY.

---

AFAIK, if you want to use VISA in LabVIEW it is required to install VISA after you installed LabVIEW, because VISA installer includes LabVIEW support. So, if you install VISA first then LabVIEW is not aware of VISA.

See the note on the download page for VISA: https://www.ni.com/en/support/downloads/drivers/download.ni-visa.html?srsltid=AfmBOoqKgAU3z5Fqq5Hqvl... 

Install programming environments such as NI LabVIEW or Microsoft Visual Studio® before installing this product.

[Jousepa]

Its not the first time I use VISA blocks so its 100% not that. But thanks anyways

[yeah]

Is the COM port occupied by other applications? try to close other applications. 

[UliB · Accepted solution]

Did you see these knowledge articles?

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P6v9SAC&l=en-US 

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P87BSAS&l=en-US 

[Jousepa]

I'll try that, probably fixes it. I'll close the thread. Thank you.