kilaru

Hmm, doesn't appear that you are initializing the port first. Look at the examples in the Simple Serial library in LabVIEW:

C:\Program Files\National Instruments\LabVIEW 7.0\examples\instr\smplserl.llb\LabVIEW <-> Serial.vi

Assuming you are using Windows, go to Start > Programs > Accessories > Communications > HyperTerminal to get a simple application to read and write to a serial port. Use that to test out your device and make sure it communicates with the computer first, then use LabVIEW.

Dear Michael,

As I opened the Hyper Terminal, window named <new connection> was displayed. In the Name block I have given some name, then it gave, choose the country region to make phone call, area code, phone no,

in the connectiong using block, there were several options COM1, COM2 and TCP/IP

Then Click OK.

then display to set port settings,

I set baud rate:9600

Data bits: 8

Parity: None

Stop bits:2

Flow control: None

Then Hyperterminal window was opened and it was showing connected but not giving any data on the screen.

Its not making any sence to me giving region, area code and phone no. to setup hyper terminal connection. I wanna make sure about that.

I guess I lost somewhere.

Thanks

kilaru

Could you tell us a little more about your application and/or upload a VI/LLB that shows what you are trying to do and the problem? Also, you should take a look at the examples in LabVIEW for serial communications. Finally, are you sure the hardware you are connecting to is working okay? Have you tried to talk to it using a simple serial terminal application on the same computer as you have LabVIEW on?

Michael,

I'm uploading my program. Please check this out. I'm not sure how to check whether hardware working properly or not. It was mentioned in the manual that interface should connect with DTE(computer) with female, but I end up with both male at the computer. So I used another pin to change it to female at DTE.

Thank you

Kilaru

Download File:post-3413-1131130946.vi

Dear Members,

I used VISA Read to take data continuously from top loading balance. But, after I hit run, Lab VIEW gave error message that time out expired before operation is completed. I dont know how to fix my problem.

Can any one did the same before. In that case can you share it with me?

Thanks in advance

Kilaru

HI,

I have a trouble to take data from balance with respect to time via RS 232 interface. After some time hitting run, it was giving an error message that error occured at VISA read with code -1073807339 and Operation timed out before completion of execution.

I'm Novice in programming with Lab VIEW, any suggestions would be greatly appreciated

Thanks

Kilaru