Hello Whitsy,
I'm assuming you are using a DAQmx Terminal Control or Constant wired
to the source input of a DAQmx Start Trigger, you can use the internal
channel, ctr0InternalOutput, to trigger your AI task. To include this
and all other internal channels in your DAQmx Terminal list, you will
have to change the I/O Name Filtering properties. To change these
properties right click on the terminal (on the front panel if the
terminal is a control or on the block diagram if the terminal is a
constant) and select I/O Name Filtering. Check the Include
Advanced Terminals box and select OK. The DAQmx Terminal will populate
the internal channels at the very bottom of the list (if you have
multiple devices, the advanced terminals are separated from the regular
terminals).
Regards,
Micaela
Micaela N
National Instruments