Hello Everyone,
I'm using Labview (8.6) to
make a program that interacts with a measurement system.
The communication with the
device is done trough a serial (Rs-422) port. The device sends messages at 5Hz
rate after a request from the PC.
The structure of the
messages sent by the device is always the same, with a known minimal length and
a two-character terminaison.19200 baud , parity=none, bitstop=1, databits=8.
I'm trying to make an Event
based program. Please find attached the example of vi that I use (8.5 version).
I have a lot of warnings
and after 50 cycles an error comes if I don’t use the VISA Disable Event and VISA
Discard Event. Il seems that the event FIFO is never emptied event if I use
the VISA Wait On Event at each iteration of the loop.
The warnings and error are
also attached. It seems that I haven’t good understood the event based programming.
Can someone give me an explanation, how does it work or give me another
proposition to identify the end of a serial message with 2 TermChar.
Thank
you in advance for your support.
