What target are you using? If it is Windows, Mac, or Linux, you cannot generate a 200µsec delay in software. The multitasking nature of these operating systems makes any sort of timing with resolution better than about 20ms highly problematic. However, many of the hardware I/O boards National Instruments (and other vendors) sells can generate such delays. To help you accomplish this, we will need more information (what is your OS, what is your hardware, what is the delay being used for, how is it triggered, etc.).
If you are using FPGA as a target, a 200µsec delay is trivial. Just use the delay VI at the appropriate point in your code. RT is similar, although resolution and accuracy will depend on your target processor.
Note that you can use the high resolution timer on most modern processors from LabVIEW using a multitasking OS (use <vi.lib>\Utility\High Resolution Relative Seconds.vi). This allows you to time things with high resolution, but the results are subject to a lot of jitter and must be treated with caution.
