LabVIEW
parallell execution?
Hello fred,
if you want parallel execution, then you have to program it... See the attached example.
Btw you should always use delays in loops, even in examples.
When doing communication with the serial port, you should not mix up read and write accesses. The port gives you answers to your write access in a certain order so you have to check those also in a certain order. So you should put the serial port comm stuff in a subvi that is non reentrable (VI properties -> execution -> reentrant switched off) to avoid mixed port access. You can find many examples for this in the forum, look for device drivers (for instance Votsch climate chambers with serial port communication).
Best regards,
GerdW
if you want parallel execution, then you have to program it... See the attached example.
Btw you should always use delays in loops, even in examples.
When doing communication with the serial port, you should not mix up read and write accesses. The port gives you answers to your write access in a certain order so you have to check those also in a certain order. So you should put the serial port comm stuff in a subvi that is non reentrable (VI properties -> execution -> reentrant switched off) to avoid mixed port access. You can find many examples for this in the forum, look for device drivers (for instance Votsch climate chambers with serial port communication).
Best regards,
GerdW
Hello fred,
your While loop looks good...
Why can't you differ between normal read and answers to commands? First you write the command, then you read the answer. If "send command" is false, then you have a normal/continous reading.
If you just want to write commands, then you have to introduce a case structure around the VISA read. Make a boolean switch "Just write command" and wire this to the case selector.
I attached an older example of serial communication (made for Vötsch Climate chambers). It uses the old serial port vi's, but you can do the same with VISA. Just replace with appropriate vi (Read, Write and Bytes at Serial Port, all in VISA->Advanced->Serial).
Best regards,
GerdW
your While loop looks good...
Why can't you differ between normal read and answers to commands? First you write the command, then you read the answer. If "send command" is false, then you have a normal/continous reading.
If you just want to write commands, then you have to introduce a case structure around the VISA read. Make a boolean switch "Just write command" and wire this to the case selector.
I attached an older example of serial communication (made for Vötsch Climate chambers). It uses the old serial port vi's, but you can do the same with VISA. Just replace with appropriate vi (Read, Write and Bytes at Serial Port, all in VISA->Advanced->Serial).
Best regards,
GerdW
Hello Fredda,
so your problem is (kind of) independent of the serial communication. You have to track the signal and test for a (significant) change. Maybe you can try arrays and use moving average for detection...
What kind of device is it? Maybe some people in the forum have used it too and are able to help? It seems te be a rather simple logic, if it only gives you an output signal.
Best regards,
GerdW
so your problem is (kind of) independent of the serial communication. You have to track the signal and test for a (significant) change. Maybe you can try arrays and use moving average for detection...
What kind of device is it? Maybe some people in the forum have used it too and are able to help? It seems te be a rather simple logic, if it only gives you an output signal.
Best regards,
GerdW
