9188 sample clock for Example VI

[roto123]

Hi,

   I'm trying to run the Example VI: "Gen Event for Ext Signal" on Labview 10 with the NI cDAQ 9188. I'm getting an error (see below). I tried fixing this error by changing the code from "Hardware Timed Signal Point" to "Continuous" but then it seems my sample clock doesnt work. Any ideas what's going on?

>>>>>>>>

Error -200077 occurred at Property Node DAQmx Timing (arg 3) in DAQmx Timing (Sample Clock).vi:2->Gen Event for Ext Signal.vi


Possible reason(s):

Requested value is not a supported value for this property. The property value may be invalid because it conflicts with another property.

Property: SampQuant.SampMode
Requested Value: Hardware Timed Single Point
You Can Select: Finite Samples, Continuous Samples

Task Name: _unnamedTask<296B>

>>>>>>>>>>

[roto123]

it appears my 9188 does not support Hardware Timed Signal Point... as seen from this link:

http://digital.ni.com/public.nsf/allkb/B4E831774F29FB038625754C0081C050

Perhaps there is a way around this? I'm not getting the code to read my trigger when I change to Continous mode...

[Ryan-C]

Hi there roto,

Does the following link help?

NI-DAQmx Hardware-Timed Single Point Support for Oversample Clock Timed Devices: http://zone.ni.com/devzone/cda/pub/p/id/1325

Best,

[roto123]

thanks for the tutorial, that should be very useful, but my 9188 doesnt seem to support hardware timed single point. Is there something I can buy that is cheap and simple that I can add on to this system to get this functionality? I'm currently using a labtop connected to the 9188 which then connects to the digital output pins of a 9401.

[John_P1]

Hi roto123,

Most USB and Ethernet devices don't support Hardware-timed Single Point--the feature just isn't very useful when you are on a non-deterministic bus.  Could you let us know more about the big picture of your application and what you are trying to do with the hardware?

Best Regards,