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My application built with Labview 6.1 running on Windows '95 does not recognize COM1.
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tjazx9r
Sep 22, 2004, 4:04:24 PM9/22/04
to
I am using VISA vi's to try and communicate serially using COM1. I
have installed VISA runtime engine 2.6, which seems to be the last
version still compatible with '95. Do I still need to install the VISA
device drivers? Is there something else missing? I've also included
'serpdrv' (just in case) & 'lvrt.dll' in my build. I can see 'COM1' on
the hardware control panel. I've tried modifying the 'visaconf' file,
but it didn't work - the file gets replaced with one that does not
list COM1. HELP!
have installed VISA runtime engine 2.6, which seems to be the last
version still compatible with '95. Do I still need to install the VISA
device drivers? Is there something else missing? I've also included
'serpdrv' (just in case) & 'lvrt.dll' in my build. I can see 'COM1' on
the hardware control panel. I've tried modifying the 'visaconf' file,
but it didn't work - the file gets replaced with one that does not
list COM1. HELP!
Ricardo SR
Sep 23, 2004, 10:27:58 AM9/23/04
to
Hello,
I don’t know if you have tried using the standard name and not the
VISA Alias. COM1 is a visa alias that you specify in MAX. MAX will
modify the visaconf.ini file that apparently you have modified.
Check this document and let me know if this helps.
<a href=
http://digital.ni.com/public.nsf/websearch/DB5E81EAFC9A463886256AA8005EA2B1?OpenDocument>
My VISA Executable Does Not Run on a Non-Development Machine</a href>
Basically it says that you need to call the serial port as
ASRL1::INSTR.
Hope this helps.
Thank you,
Ricardo S.
tjazx9r
Sep 23, 2004, 12:42:35 PM9/23/04
to
Unfortunately, ASRL1:INSTR is not given as a choice. Since it's a
laptop with docking capabilities, the choices should be ASRL1,2,5 &
10, which stand for respectively COM1,2,5, and LPT1. COM1 = normal
serial port, COM2 = docking station serial port (even though the
docking station is not connected), COM5 = Infrared port, and LPT1 is
of course the printer port. VISA will not accept ASRL1 or COM1, and I
can't figure out why.
laptop with docking capabilities, the choices should be ASRL1,2,5 &
10, which stand for respectively COM1,2,5, and LPT1. COM1 = normal
serial port, COM2 = docking station serial port (even though the
docking station is not connected), COM5 = Infrared port, and LPT1 is
of course the printer port. VISA will not accept ASRL1 or COM1, and I
can't figure out why.
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