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Using a Barcode scanner to control ATS system

I have an existing ATS system that predominantly uses mouse to control & select the next operation.

 

I have created a 'Command Line' text box and given it primary focus so that I can have a couple of pre-printed Barcode commands to perform the most common actions - e.g. Reset & Run another test. Detect the changed value, parse the content and perform the action. This seems to work quite well.

 

I also use it to effect a 'Done' or 'Continue' event on a boolean control, as if you set focus and then get a 'c/r' from the Keyboard emulation of a USB barcode reader, it's fine.

 

Code 39, standard Honeywell 1d barcode reader.

 

Except.

If my prompt barcode is

*CONTINUE*, *CONT*, *DONE-CONT* I don't seem to get any reaction - I hear the beep, but there is no action in Labview.

*RESET-RUN*, *DONE*, *0004* work, even *C-O-N-T-I-N-U-E* works.

Any ideas? Am I hitting a reserved sequence in Code 39 or is Labview messing me up?

All the codes come out fine if I try them in any Notepad type editor.

 

The attached end of test display gives an idea - this is the boolean button that refuses to switch with CONT or CONTINUE - I have removed all the sub-vi dependencies I can spot so this should run stand alone - or put it in a calling VI and try the different options specified in the help text.... If you run it stand alone, you'll have to set the hidden 'Action' string cointrol to 'Show' - probably make this default & save it - you might also like to stop it disapearing at the end of the run 🙂 set the second fp.open to True - or delete it..

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Check the manual for the barcode scanner.

 

Sounds like it has reserved sequences to handle "CONT" that needs to be disabled.

 

Ben

Retired Senior Automation Systems Architect with Data Science Automation LabVIEW Champion Knight of NI and Prepper LinkedIn Profile YouTube Channel
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Thanks, but I kind of proved that it wasn't the Barcode Reader itself, as I could get all the sequences I described to render correctly in several different notepad style applications..

 

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Only other idea I can offer is to check the Key navigation for the string control.

 

Ben

Retired Senior Automation Systems Architect with Data Science Automation LabVIEW Champion Knight of NI and Prepper LinkedIn Profile YouTube Channel
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Thanks, Ben, Key nav is set to 'None' - and like I say, I seem to get the same effect with a boolean as I do with the string control... These things are sent to try us..... 😞

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Supplemental:

I attach here the word file with sample barcodes I have been playing with

I have also tried pressing keys on the keyboard to see what will trigger the boolean - it looks like the letter T will do it, but no other (does this set the boolean =True?)

This behaviour must be documented somewhere - but I haven't found where yet!

 

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