Comms with parallel port

Hi
I am trying to send a command to a printer via the parallel port, but am having no joy. I have set the BIOS printer port setting to 'Bidirectional', and created a small test program as attached.
I need to send an <ESC>A, 10 (hex), <ESC>Z in order to stop the printer during a print run, and an <ESC>A, 11 (hex), <ESC>Z to restart the printer. I have used the functions found in the example, but maybe I'm misunderstanding the functionality of the functions?
Attachments:
Test LPT1 commands for prn stop-start.vi ‏68 KB

Hi Alan,
I was working on a windows 2000 sending a signal to the parallel port using a Out Port.VI and it worked fine because the format of the computer was a 378 like you have in your program; however, when i tried to use this program in a windows vista, this didnt work because the format of the parallel port of this computer was BD00-BD07, which is not written in 16 bit like your program. In order to solve this problem, i used VISA Write and it would automatically send the signal to the parallel port. Try using VISA and you shouldnt have any problems. I will send you an example VI so you can see how i used it. I also modified your VI using VISA instead of using Out Port.vi. It has an error because part of the file is missing but this should get you started. If you have any questions dont hesitate to ask.
Guillermo Naranjo
Attachments:
UsingVISA.vi ‏11 KB
Modified Test LPT1 commands for prn stop-start.vi ‏19 KB

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> John,
>
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> >
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==============================
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==============================
ps. Sorry for my weak English . hehe ....

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Comms with parallel port

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