Hmmmm... Maybe you don't have your DAQ drivers installed properly. But if it works from MAX, then it must be installed. Anyway, on the block diagram, go to the functions palette and click on NI Measurements - Data Aquisition - Digital I/O - DIO Config.vi. Bring this vi to your block diagram. Wire the inputs to the config vi, device number (get from MAX), group (use 0), port list (array of strings - each element is a port number - start with one element of 0), direction (right click and select create constant - select output). From the same functions palette, bring the DIO Write vi onto your block diagram. Wire the Task ID output of the config vi to the Task ID input of the DIO Write vi. Wire Error Out to Error In. Wire in the digital data (an array of numerics). This will send the data out of the DIO port. You can read the DIO inputs by configuring the input ports with DIO Config, then using DIO Read vi. At the end of your program use DIO Clear vi to clear all buffers. Play with it by creating a small example vi to write some outputs, use LEDs or a DMM to verify that the correct lines go high and low. You can also experiment with reading the DIO by connecting the input lines to a 5 volt source or ground, and using a vi to read the values, then display them. Hope this gets you started. Here is an example using the 653x DIO. This example uses the low level function Port Config instead of the higher level DIO Config. You can wire your DAQ Channel icon to the Port Config input. Study the example, but it might be easier to use higher level functions before going to lower level functions.
