Serial Visa question?

[horanyee]

Hi,

Currently I am using VISA to interface with RS232.

My question is that I see some execution time difference by every eight frame sent

out by VISA.

For example,

Serial bus condition: Baud: 9600 Data bit:8, Stop bit:1

I used the example "basic serial write/read example.vi"

So if I were to write data "1", I see about 16ms execution in my application,

with data up to "12345678", eight data I see it take same 16ms,

however as soon as I increase data to 9 characters, "123456789",

I see the time increase to about 32ms.

So my question is that does serial VISA application makes group of eight frame

before it write to HW or read from HW? Is this why I see execution time

increase almost twice every 8 characters?

Thank you in advance,

Do

[Anil Kamani]

Hi.

I am Having Issue with the serial Communication. I am using Labview Version 8.6. I used the I used the example "basic serial write/read example.vi" to just write at serial port for testing purpose. My *.vi file name is TestCommunication.vi.

I want to see the data on hyper terminal by writing some thing on to Com Port, but for a one time simulation i got the following error. and I am unable to write something on port.

"Error -1073807202 occurred at Property Node (arg 1) in VISA Configure Serial Port (Instr).vi->TestCommunication.vi"

Would you please help me out for going me at write way.

Regards,

Anil Kamani

[Dennis_Knutson]

Anil,

Don't hijack someone elses thread with a completely unrelated question.

You should start a new thread or just do a search of the forum for that error code. It's a common question and mistake you have made.

[pflores]

Do,

How are you coming up with this timing? Can you post your VI that you are using?

I am not aware of something in hardware that should cause this issue.

[Anil Kamani]

hi..

Thanks

Please find the Below Attatchement "TestCommunication.vi".

while simulating i got the error " Error -1073807202 occurred at Property Node (arg 1) in VISA Configure Serial Port (Instr).vi->TestCommunication.vi "

Regards,

Anil Kamani

[muks]

***Double post***

deleted

Message Edited by muks on 07-24-2009 06:18 AM

[muks]

You had already posted the same message here as well.

Why dont you start your own new thread?

[pflores]

Anil,

Just a few tips on how the forums work:

- It is most beneficial to keep each thread to one particular topic. So, unless your problem is exactly the same as the original poster, you should create a new post.

- In order to be most efficient, you should only post your problem once. As long as you post in the correct area - Instrument Control (GPIB, Serial, VISA, IVI) - for your particular question, then the relevant people should see it and provide assistance.

Some more helpful information about the forums is listed in the FAQ.

For your particular issue, I would visit the Intrument Controle board linked above and create a new post as described in the FAQ page.

Do, if you still are in need of assistance, please respond here.

Regards,

[horanyee · Accepted solution]

No, I do not have a issue anymore.

There is some minor time differences, but not the double time

which can be acceptable.

Thank you.