Serial Communication by VISA: what' s wrong ?

[Dennis_Knutson]

Post the log in a readable format - i.e. as plain text and attach the manual for the instrument. You do have a copy of the manual don't you? There is not much sense in trying to communicate if you don't have the manual.

Read length is 0 because there is nothing to read and there is nothing to read because probably you are sending an incorrect command or the command is not formatted correctly.

I will also repeat my suggestion to try hyperterminal first.

[frusta]

Hi

this is the log in .doc 

[frusta]

How we can see in the original logs there is a different string line

0             0.00036206         Col60.exe             IRP_MJ_CREATE   Serial0   SUCCESS                Options: Open    

that  there isn't in logs by labVIEW; maybe this is the problem?? i'm explaining better: with LV there isn't that string line and i guess that comunication is not already to start!!!! 

Another question: the signal  that  we can see in LV logs

5             0.00000475         LabVIEW.exe        IOCTL_SERIAL_SET_RTS     Serial0   SUCCESS                               

6             0.00000475         LabVIEW.exe        IOCTL_SERIAL_SET_DTR     Serial0   SUCCESS 

there aren't in original logs...this is important or not?

[Dennis_Knutson]

I don't think the first line is important at all.

The handshaking is very important and if you don't have that correct, you will not communicate. I don't have portmon installed right now so I can't experiment. What exactly do you have flow control set to when you run the VI? You know the baud rate/parity/data bits/stop bits so you can try different flow settings.

Your lack of mention of a progamming manual after repeated requests is disturbing. Have you even tried contacting the vendor?