Series read reads the available characters


I am trying to contact a Magellan/Ion controller, using RS 485. I'm running an external monitor with shows me 7 bytes sent by the controller for labview, I use the writing basis of VISA then wait a few milliseconds and then VISA read so that the use of the property of bytes to the port say the VISA read the number of bytes to read. When I watch OR spy, I see that read VISA function is told to read 7 bytes of the right address COM, but only six bytes are read. I changed the delay before the time of reading from 0 to so long that it is not read anything and I still have the problem. By a number of bytes that reading VISA has internally that I'm running into timeout or maximum or is there some other solution to my problem?

It is not at all strange. It is planned. If you do not read ASCII, clear the nature of the expression. VISA read ends as soon as the character is detected.

Tags: NI Hardware

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