entry of the FPGA 9402 trigger cRIO 9064 on DIO does not read

Hello

I have a cRIO 9064 using the Module C 9402 as a quick DIO in a SCTL. I use it in a (GPDD) digital delay pulse generator.

I've successfully the GPDD, triggered by a square wave generated internal, clocked at 1 MHz.

and I measure the pulse output perfect on an oscillascope.

My implementation is actually a clone of in: http://www.ni.com/example/31131/en/

However, when I try to trigger from an external 1 MHz, 6 Volt amplitude; duty_cycle 50%, square entering the DIO3 wave

There is no trigger, as seen on the Ticks_Between_Trig - which should be around 40, when it is correct release.

I used the method "Check status" to make sure that the 9402 is ready before the SCTL.

(Note: although it is labled Mod3 in the screenshot, it is actaully Mod1 and it simple namign incompatibility - which, once set doesn't change anything.)

I see not all digital HIGH when the input trigger control, what I do when you use the internal trigger.

The LED flashes, quite often even if actually at 1 MHz.

My question is what thing I must have the DIO 9402 read the input signal.

I followed the instructions here:

http://zone.NI.com/reference/en-XX/help/370984R-01/criodevicehelp/cRIO-9402/

but maybe I missed something.

Thank you

Michael

Resolved,

I had a bad input pulse generator which was flacky.

When I check the amplitude of the pulses on an oscilascope but a day later, when I corrected my code to include the ready method of Module C.

the amplitude of impulse was not working, but I've always tried to test with her.

Finally I double checked on the oscillascope again the trigger signal to find not suffecient.

Old eqiupment... then the warm-up does not.

Michael

Tags: NI Software

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