rohrdt wrote:
> Here are the steps I am doing.
> 1) Run my vi. The vi initializes, reads, then closes the serial port.
> 2) Since LV isn't recieving data I open and connect to the port with
> hyperterminal. After seeing the data from hyperterminal I disconnect.
> 3) Then I restart my vi, and I can see the data from LV
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Hi rohrdt,
maybe you could post the serial vi here (or mail it to me right away) and
will have a look at it.
I mainly use serial communication with RS-232 and RS-485, but only had
probs like this when I had an error in the vi.
One thing you could try, is to use a second computer connected to the
first one with a 0-modem cable. Use Hyperterminal on the second one and
simulate your instrument by fingers
trokes or a written vi.
Then you can see on the second computer what what comes across the line
from your first computer (I guess the first computer should send a kind
of data-request command, before your instrument returns data).
Oh, and another idea..., there are Break-out boxes available at
electronic shops with LEDs on it. They monitor the signal states and you
will see right away if there is some "life" on the handshake lines or
not. Then you would know if its worth considering handling of those
lines.
Let me know if this helps,
Rainer
