Communication problem series

Hello

I want to order an instrument via a Labview serial port, but I am unable to communicate properly with him.  It works perfectly when I use Hyper Terminal, but as soon as I use the ' basic series write and Read.vi ", I have a timeout problem.  'Write' does not give me an error, but the "read" never works.  Unfortunately, no or the controls seem to work.  That seems to be a communication problem.

Here are the parameters of communication for this instrument:

Baud rate: 115200

Data bits: 8

Stop bits: 1

Parity: None

Flow control: no

Charaters termination: \r\n

By MAX, the communication port is OK and I am able to open the test Panel.  Howerver, I'm not able to access information when I ask a query, or there is no action to simple commands.

Thanks for your help

StarFiber wrote:

I used the example of LV2009: Advanced Serial write and Read.vi.  Just to make sure that I don't have a mistake in coding. I just did the current value as a default value, so you can see what I actually sent to the instrument.

I guess that you do not actually send * IDN? given that it is not even a command that is supported by the instrument.

The Canadian standard requires that you cancel orders in writing with BOTH a \r and \n. Using the 'end writing with stop character?' only the \n is sent as it is what is on the stop character. It is unclear how the device responds, or not at all, if she did not see the \r and \n. So disable this option, the "string to write" play to display in '-' codes mode (right click and select in the context menu) and enter the command, followed by \r\n. otherwise, you could leave this option on, but you must make sure that you add \r to your order in the text box "string to write.

Tags: NI Software

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