I have made a vi that reads the delays of a delay generator (there is 4 different delays: A,B,C and D). It seems to work, however when you select a new delay (that is to be read) the old delay is still read in. Only after running the vi 4 to 10 times does the correct value of the new delay show up. What is wrong? I have tried changing the read byte count - less than 19 gives and error (in the read string) and more seems to make no change. I also tried to set a mode but that didnt seem to change things. Hope someone can tell me whats going on. Im using a NI USB to GPIB converter. Thanks, Simon

Instrument Control (GPIB, Serial, VISA, IVI)

Page 9 of the documentation, under "GPIB PPROGRAMMING - DETAILED COMMAND LIST" explains how to retrieve settings.

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