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how to transfer a VISA resource name between Teststand and labview
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RAVDM
Nov 29, 2006, 4:40:24 AM11/29/06
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I use a sequencefileload callback to initialize a serial port and transfer the resource name to teststand by storing it in the fileglobals using a type "container, Instance of type 'labviewiocontrol'
and after test using sequenfileunload callback to release that resource, it got an error that:
VISA Close in CloseVISAPLC.viVISA: (Hex 0xBFFF000E) The given session or object reference is invalid.
-1073807346; User-defined error code.
and after test using sequenfileunload callback to release that resource, it got an error that:
VISA Close in CloseVISAPLC.viVISA: (Hex 0xBFFF000E) The given session or object reference is invalid.
-1073807346; User-defined error code.
RAVDM
Nov 29, 2006, 8:10:16 AM11/29/06
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hi ray,
thanks for your reply.
do you mean that even the resource name can't be used in my main sequence?
as I think the two callbacks and the main sequence are all in the same sequence file.
thanks for your reply.
do you mean that even the resource name can't be used in my main sequence?
as I think the two callbacks and the main sequence are all in the same sequence file.
Ray Farmer
Nov 29, 2006, 8:40:18 AM11/29/06
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Hi,
If its the Alias such "COM1" then that will be ok, but if its a handle returned by the initialise function then that will not, and looking at your error message it sounds like the later. Therefore you would have to perform the initialise in you MainSequence.
Regards
Ray Farmer
If its the Alias such "COM1" then that will be ok, but if its a handle returned by the initialise function then that will not, and looking at your error message it sounds like the later. Therefore you would have to perform the initialise in you MainSequence.
Regards
Ray Farmer
RAVDM
Nov 29, 2006, 9:10:20 PM11/29/06
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Today I have tried to put both in the same sequence of the sequence file (to open the session first and then close the session), and still got the same failure report.
what I use to store the VISA resource name fileglobals.VISA_RESOURCEIt's a container of device name: COM1and sessionnumber: 1642504
it's really strange and why?
what I use to store the VISA resource name fileglobals.VISA_RESOURCEIt's a container of device name: COM1and sessionnumber: 1642504
it's really strange and why?
RAVDM
Nov 30, 2006, 7:40:21 AM11/30/06
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now I solve the problem, but still I don't know why.
I create a new sequence and copy those two vi to initialize and close VISA, it works correctly.
and I copy it back to the original sequence and replace the original one, and it's ok.
It's a bug in the teststand, I don't know. Maybe I have changed sth. during that operation, I don't know.
but it's solved.
I create a new sequence and copy those two vi to initialize and close VISA, it works correctly.
and I copy it back to the original sequence and replace the original one, and it's ok.
It's a bug in the teststand, I don't know. Maybe I have changed sth. during that operation, I don't know.
but it's solved.
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