How can I read the request to send line state continually?

[PRSG]

Hello,
I new in LV and I'm trying to control a monochomator using RS232 serial port. The problem is that when the apparatus is in operation, sends signals to the request to send line (rs232) whit pulses of inactivity of 30 microseconds. How can count these pulses?

[Randy Solomonson]

Hello-

The rs232 port is designed to send/receive command bytes to an instrument. Unfortunately, the rs232 hardware is not able to detect pulses in a line. National Instruments sells a variety of Data Acquistion (DAQ) cards that may be better suited for such an application. It sounds like a Digial I/O board may work great for this application. See our online catalog at ni.com/catalog for more details.

Randy Solomonson
Application Engineer
National Instruments