E Series Devices
You can set the following properties on E Series, M Series, and S Series devices while the task is running. If a property is not listed here, you cannot set it while the task is running.
DAQmx Channel
Analog Output:General Properties:DAC:Reference Voltage:Connect DAC Reference to Ground(E Series and M Series only)
Digital Output:Tristate
Counter Output:Pulse:Time:High Time
Counter Output:Pulse:Time:Low Time
Counter Output:Pulse:Frequency:Frequency
Counter Output:Pulse:Frequency:Duty Cycle
Counter Output:Pulse:Ticks:High Ticks
Counter Output:Pulse:Ticks:Low Ticks
DAQmx Timing
Sample Clock:Rate (Analog Output only)