Change the stop character doesn't seem to work

Hello world

I hope that this will be a quick fix and I'm just on something stupid!

In short, I'm doing a LabView program to control a pump syringe via RS - 232. I use a Keyspan USB serial adapter to connect my laptop to the device. After a repair on my own, I was able to download a program HyperTerminal and can communicate with my well pump (change of position, speed, during initialization, etc.). However, when I try to do the same thing with LabView, nothing happens.

First of all, I can say that LabView sends my pump data, because the light on the USB-serial adapter flashes quickly once (its indication that it comes to Rx/Tx). The same thing happens when I communicate with him via the HyperTerminal program. He seems to be in working condition.

After a lot of reading posts on this forum and developer of the examples, I think that the problem is to send a character of endpoint with my data string. For example, when I have the program HyperTerminal open, I can enter "/ 1ZR ', which will initialize the pump. That move the pump to its original position and prepares for further information. When I go into the properties of "stop character" in this software, it is said: '13,10"(with the quotes). As far as I know, 13 in decimal is a return carriage (or 0xD hex) and 10 is a line break. I don't know if it sends them both. The company says that my program does not work because my LabView program is probably not send the right stop character.

I tried almost everything I can think of to change the stop character. I know that the VISA VI set up the Serial Port uses the same settings as my COM port shows when I open Control Panel (9600 baud rate, etc.). I had a big bang and thought that maybe I should check MAX and see what his settings are... they are the same. HOWEVER, when I open the "VISA test Panel" on MAX for my COM port, under "Settings/o", the stop character is set to line feed \n. I have change to \r carriage return, but when I click on "apply changes", I get this:

SET to 0xD stop character
No error

And when I close the Panel test and re - open, always back to \n line break. I also tried to change the setting of "tank of termination" in the VISA set a Serial Port to a constant (as a 13) or control (which I tried like 0xD hex as well as 13 decimal).

I'm fairly convinced it's the issue... If anyone has any idea on how I can force it to use a carriage return? I even tried to disable 'enable the separation tank' and manually compose a string with a \r at the end, but it does not work either...

I have attached a photo of a simple VI which shows what I want to do (the 2000ms waiting was put there just so that he would not close the COM port before initialization completed... its useless I think).

Thanks for your help in advance!

B

The stop character with the definition configuration function has absolutely nothing for adding a character of termination in writing. Look at the advanced example for how to do it. In addition, if you want to do with the string you enter, you must activate '-' code display. It is a right click option.

Tags: NI Software

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