How do I talk to thridparty ddl inside of labview

I new at dll. I have a third party driver that takes control of my RS232 port to monitor a UV light. I can use
there app to read and write commands. I would like to use their app and their string data to plot a graph or chart.
I must send a command to receive a point of a graph. I would like to look at 20 point per/sec. can I send a command to that app and rec. the data that fast for the viewing on a graph.

DLL calls are very fast.
The speed at which you can call the DLL is is dependent on the DLL itself. Provided the DLL returns quickly a resonably modern machine can do what you are asking with a few assides.
1) Exactly how many bytes are invloved in the excahnge of commands and responces between the PC and the device?
2) At what baud are the devices talking?
3) How quickly does the device respond to a command?
4) A PC run any version of Windows has problems with jitter. At 20 times a second you will be faced with rather sizable indetrminism (guessing plus or minus 50%).
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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