Hi:
Analog Out Channel outputs the last value in the buffer. Therefore to set the line to low, you need to put a 0 as the last element of the buffer. Alternatively, you can also reset the device using the reset device VI.
In the attached VI, after the program finishes executing the analog output channel stays at 6V. To make the line low (0V) you have insert a 0 after into the last element of the array.
Regards,
Bharat Sandhu
Applications Engineer
National Instruments
Penny