Combi Trigger Pulse High (not Low)

[ignisuti]

I have a Combi Trigger setup as shown in attached image. The intent was to send a pulse to a relay module when the input signal goes high so that I can capture all the data relevant to a hardware failure.

This is working well except that it's also sending a pulse when my input signal goes low giving me twice as much data to sort through. Any suggestions?

[hw70]

Can you provide a screenshot of one trigger event, please?

(1) Show the data that is guided into the trigger module,

(2) and the data that leaves the trigger module.

Input both, (1) and (2), into one chart recorder.

[ignisuti]

I tried, but I get a message from the Recorder Module saying "Display time is too large and rounded down to the next possible size."

Then, the program runs, but no data appears in the Recorder window.

[ignisuti]

So, that'll probably be a post for some other time (why doesn't the Recorder work), but for now, I'd be happy to figure out this Combi Trigger.

I know the Y/t charts work well in my worksheet. So, I tried to capture the information you wanted with that. Please see the attached images.

Very strange to me that the output of my Combi Trigger sits at 3.75V and then pulses to 10V. I was expecting a 0-5V pulse here.

[hw70]

Turn off the re-trigger option ( http://forums.ni.com/ni/attachments/ni/50/2960/1/Capture.PNG ).

But i am confused, because there shouldn't be another trigger event, if the ttl-signal alternates between 0V and 5V only?!

In Y/t chart there is only one scale visible: the scale of channel 1 (red signal).

Leftclick the button at the bottom "Y/t chart0" once, to switch to the scale of channel 0 (blue signal).

To show more than one scale, click the "scale" button in the symbol bar (button left of brush button).

Or split the chart to show each signal in its own part of the window (3 buttons to the left of brush button).

[ignisuti]

The scale for every channel is identical. So, for some reason this signal is way different than I expect. 

Any ideas?