I/O Port Speed

TurnipTruck
TurnipTruck Junior Member
in AMX Hardware
Greetings,

I am working on an application in which I would need to count digital pulses through an NI-x100 I/O port.

Does anyone know if there is a published spec on how fast these ports can respond? I'm quite sure they have some element of debouncing to them. I would need to count no more than 5 Hz.

Thanks.
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Comments

  • Joe Hebert
    Joe Hebert Junior Member
    The answer I got from AMX back in July was:
    ?Looks like the IO ports require at least a 300 millisecond delay in order to be considered change of state. ?

    I?m not sure if that was for an NI-X000 or an NI-X100 series though. It might have even been for an NI-700, I don?t remember. I needed to monitor a 12.5 Hz watchdog and knew I was way out of the ballpark and so I never pursed it any further.
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  • TurnipTruck
    TurnipTruck Junior Member
    Thanks Joe. I'll check with them again. Maybe there is some special way?

    I need to count pulses from antenna positioners. Right now the AMX controls dedicated positioners, but they are very clumsy and lack meaningful feedback.
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