why the start trigger not supported in my counting edge vi

[feilong]

Hello All,

    Please see my attached vi. My goal is to start 2 counter counting simutaneously. A PFI line is used as sampling clock which I will input some pulse train. As my E series DAQ-card doesn't support arm trigger, I have to use two start trigger. but there's error when I run it:

Error -200452 occurred at Property Node DAQmx Trigger (arg 1) in DAQmx Start Trigger (Digital Edge).vi->sync counter v2.vi

Possible reason(s):

Specified property is not supported by the device or is not applicable to the task.

Property: Start.TrigType

Task Name: _unnamedTask<E>

[feilong]

attached vi:

[Nick_F1]

Hi Feilong,

For the E-Series card, the Arm start and the regular triggers are not available.  If your pulse train is slow enough, you can make sure that the two DAQmx Start vi's start as close together as possible by using a flat sequence structure.  Then they will start as close together as possible with an E Series card.



The other option is to use a TIO or an M-Series card.

Message Edited by Nick F on 12-21-2007 02:58 PM

Message Edited by Nick F on 12-21-2007 02:59 PM

[feilong]

thanks nick. That explains. but in E manual, it did talk about trigger in the counter section so make me confused.

feilong