Question for DAQ expert: hardware trigger problem with AT-MIO-16X

[C2]

Hi,friends.

I'm trying to use hardware trigger to trigger data aquistion from an
ion mobility spectrometer (IMS) through a NI AT-MIO-16X card. It was
working with digital trigger (digital A) and falling slope. But for
some reasons (sorry I don't have time to explain the reasons:), we
want to change it to hardware triggering.

Well, you might suggest me to follow example. Yes, I followed the one
in vi.lib/analogin/analogin.llb/Aquire N Scans Analog Hardware
Trig.vi. I wired the trigger to channel ACH0, and signal channel to
ACH4,respectively (I configure the channel number on the control panel
accordingly, too). The signal and trigger can be seen from the Run
Test Panel. Trigger falls to 0.0 V from 5.0 V.
I set the trigger level
to 1.0V with falling slope. The IMS is running in negative mode, i.e.,
the baseline of the signal is -0.2 V and the max peak height is -1.5 V
(negative mode). However, I always get error code -10403 in the sub VI
named AI trigger config.vi.

Any nice suggestions will be appreciated. Thanks.

GC

[leebmic]

Hello GC,

try to connect your trigger signal to PFI0 or PFI1 and use them as trigger channel.

best regards

Michael Leeb

[C2]

Thanks, Michael. But I can't find a PFI0 or PFI1 connector in
AT-MIO-16X card (National Instruments) according to its manual. GC

leebmic wrote in message news:<506500000005000000EF700000-1017707437000@exchange.ni.com>...
> Hello GC,
>
> try to connect your trigger signal to PFI0 or PFI1 and use them as
> trigger channel.
>
> best regards
>
> Michael Leeb

[PistolPete]

Hi Guoxiang:

I would suggest following the example for software trigger and I would use
the IMS in positive ion mode.

I also seem remember that when using more than one channel that they should
be juxtaposed, so you should be using channel 0 for the trigger and channel
1 for the signal.

Hope this helps,

Pete

"gxchem" wrote in message
news:df15148d.0204182159.3d09e9a1@posting.google.com...
> Hi,friends.
>
> I'm trying to use hardware trigger to trigger data aquistion from an
> ion mobility spectrometer (IMS) through a NI AT-MIO-16X card. It was
> working with digital trigger (digital A) and falling slope. But for
> some reasons (sorry I don't have time to explain the reasons:), we
> want to change it to hardware triggering.
>
> Well, you might
suggest me to follow example. Yes, I followed the one
> in vi.lib/analogin/analogin.llb/Aquire N Scans Analog Hardware
> Trig.vi. I wired the trigger to channel ACH0, and signal channel to
> ACH4,respectively (I configure the channel number on the control panel
> accordingly, too). The signal and trigger can be seen from the Run
> Test Panel. Trigger falls to 0.0 V from 5.0 V. I set the trigger level
> to 1.0V with falling slope. The IMS is running in negative mode, i.e.,
> the baseline of the signal is -0.2 V and the max peak height is -1.5 V
> (negative mode). However, I always get error code -10403 in the sub VI
> named AI trigger config.vi.
>
> Any nice suggestions will be appreciated. Thanks.
>
> GC

[Filipe A.]

Hello;

The board you are using there doesn't have Analog Hardware Triggering capabilities, only digital triggering. That is why you are seeing that error 10403.

To use the Hardware Analog Trigger, you will need to change the hardware to a DAQ board that supports that feature. Take a look at NI home page, for a guidance on what boards support that feature.

Hope this helps.
Filipe