Visa serial read with no terminator character

[Conseils]

Using VISA serial read, I do not wish to have a terminator character as the returned data includes all codes possible (other VISA features are required).

I have read the documentation and am unable to determine if it is possible to configure the VISA port without a Terminator character.

I have set the termination character to 0 but believe that with 0, it is looking for a NULL as the terminator character.

Do you have any experience / advice
Thanks.

[Dennis_Knutson]

Look at the VISA Configure Serial Port function where you're setting up baud rate, etc. and you'll see a terminal called Enable Termination Char. By default, it's true. Just wire a Boolean false constant to it.

[Conseils]

Thanks,
It appears that this feature is exposed at the VISA serial config at version 6.1 and later.

Prior to that you have to find the paramater and set it manually.

You saved me a shed load of time.

[Ben]

Added note for LV 7 users.

Another developer and myself discovered that after installing LV 7 on the same machine as LV 6, the VISA configure Serial Port VI in the LV 6 VI.lib was replaced by a version that did NOT havew this boolean input!

I recovered by pulling out a version that I had saved elsewhere.

Ben


Ben Rayner
Certified LabVIEW Developer
www.DSAutomation.com

[Conseils]

Now that's interesting and could explain on of the issues I had problems with.

Thanks

I have this sneaking suspision that all is not well with this function and that it is not actually turning the feature off correctly!! At this point it needs more work to confirm the nature of the issue I am experiencing. As you are probably aware with RS232 you need to take care as it could be the other end causing the issue.

Any thoughts ?

[Ben]

Make sure you have the latest and greatest VISA.

The config VI should look like the attached.

[Conseils]

The lowest option in the diagram looks as though it could nail the probelm.

That's really cool..... thanks