Weight gauge serial port test

[Oesen]

Yes, but as far as i know, i'm going to write my commands, and read it after in the test panel, but i always get that error:

"Timeout expired before operation completed" during reading process

[Dennis_Knutson]

And as far as we know, you could be writing gibberish. Explain exactly what you are writing. Better yet, attach an image.

[Oesen]

Hello. Sorry, i was inactive for some days. But im writing those commands from the manual, and reading it after

[Dennis_Knutson]

That image is just about unreadable but it looks like your command string is *IDN?. Your list of commands does not show *IDN? so why would you want to send that?

[Oesen]

Yes.. Im sending it as *IDN. What should i else send ?.. Sorry my serial port cable is in workplace, so i can't open the test panel right now

[Dennis_Knutson]

You have to send commands that are supported by the instrument! You can only send what is listed in that table. You just can't make things up and expect a response. You also cannot do a read when the instrument does not send anything back. You also have to terminate each command with a \r\n (CR\LF).

[Oesen]

I have connected my pins from RJ45 to the D25 RS-232 cable as show in the picture above

And im writing the command "DN" which resets the weight display:

As shown in the picture below:

Anything wrong with that procedure ?