VISA Read Timeout Error (-1073807339) with Axetris MFC-2252 (RS-485 Full-Duplex)

[chabazite]

Hi everyone,

I am trying to control an Axetris MFC 2252 using a 4-wire (Full-Duplex) RS-485 connection in LabVIEW. I believe I am building my command strings correctly, but my VISA Read function always times out (Error -1073807339).

This timeout error suggests the MFC is not responding to my commands, and I'm struggling to find the problem.

[altenbach]

---

@chabazite wrote:
I believe I am building my command strings correctly,.

---

Then show us what you are doing and how. Do you include the correct termination character, for example?

What other troubleshooting did you do?

[pincpanter]

Please attach your vi (preferably LabVIEW <= 2021).

Another question is: do you receive any character from the instrument?

[chabazite]

I am actually new in labview, may be I am wrong i didnt build correctly. But in picture you can see that I set everything as mentioned in mfc protocol which i attached it as well. In the code i wanted to just set new mass flow but it gives error in read function

 

[altenbach]

In general, we prefer actual code (the VI!) over pictures!

Since you don't show the radix, we cannot tell the formatting of your diagram constant (decimal or hex?). The x62 would be d98 in decimal format.

Are you really doing a division by zero here?

[dkfire]

You should also disable the Termination Character in the setup of the VISA. 

[altenbach]

As a very first debugging step, place a string indicator here and set it to hex display. What does it show?