Posttriggering analog input

[Poepperl_Andreas]

Hi,

I'm triggering my PXI4204 with an external trigger via PFI0 (about 1kHz). If I stop this trigger (i.e. disconnect it from PFI0-terminal), the DAQmx VI (see attachment) continuous to read data. I've a buffered acquisition with 10 samples per channel in a while loop (100ms).
How can detect that no trigger was received?
Why doesn't the VI timeout?

Note: I'm triggering more times than I read the the acquired data.

Thanks,
Andreas

[Andre_Saller]

If a pin is connected to nothing, its state is undefined, it may float to some Voltage, and this might be detected as a trigger-signal by the hardware. Try to set the PFI0 to 0 Volts (for example by connecting it to a GND-Pin) instead of just disconnecting the signal.