Error -200077 DAQmx Create Timing Source (Digital Edge using Counter).vi:1

[BB_Herman]

I am running the Cont Acq&Graph Voltage-Int Clk-Timed Loop.vi example and I'm getting the following error:

DAQmx Create Timing Source (Digital Edge using Counter).vi:1
Property: SignalFromTask.Signal
You Have Requested: Counter Output Event
You Can Select: Sample Clock, Sample Complete Event

Task Name: _unnamedTask<5>

If I change the input to Sample Clock or Sample Complete Event, the next error is the same error code and it tells me I need to use Counter Output Event.  It's a dog chasing its tail.

Using LabVIEW 8.5.1 with DAQmx 8.7 and USB-6211. 

If I use my 6036E daq card with a SCB-68, everything works.  The problem I guess is with the 6211.  What am I missing?

Thanks.

[Paul_C.]

Hi everyone,

I'm afraid that this example doesn't work with USB devices.  This was reported to R&D (# 100823) for further investigation.   The reason for the error is because you cannot use a clock source from a USB device to time a timed loop in LabVIEW.  This is discussed in the knowledge base found here.  The workaround would be to use the clock source from an E-series or other non-usb device to clock the timed loop in LabVIEW.  You could also make the loop software timed by replacing the timed loop with a regular while loop with a wait vi inside.

Regards,
Paul C.


Message Edited by Paul C. on 05-07-2008 11:35 AM