Why does a CRIO-9004 only provide a timed loop of 1kHz (clock) and not 1MHz?

I essentially have a compact CRIO-9004 and require a PID loop with update rates around 4-5 kHz. Additionally, I was hoping to use multiple 'timed loops' in the program in order to synchronize certain events. During this coding, the timed while loop will not work with a 1MHz clock rate and I am stuck with a clock rate of 1kHz instead. NI claims that PID loops in conjunction with the CRIO may have up date rates as high as 200 ksps. However, it appears that by employing the 1kHz clock that I can only obtain 1 ksps.
What are my options?
Thanks,
Shane

John-
The 9215 has a conversion time of 4.4us when scanning 1 channel (see page 14 of the 9215 operating manual). This equates to a little over 227KS/s. The 100KHz value is if you are reading from all 4 channels.
Link to operating manual:
http://digital.ni.com/manuals.nsf/websearch/5F2E9640C1CFE645862573AF007ABAD9
Dustin
Message Edited by Support on 10-16-2009 09:16 AM

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