Can I change the power on state of the USB-6501?

[Marni]

Hello Xiphophile,
 
You can set the direction of the digital lines of the USB-6501. To check to see if its possible look in the specs under Digital IO>>Direction Control. If its programmable the Direction Control will be "Input or output, software-selectable."
 
Setting power-up states in MAX:

- Open MAX.
- Under Devices and Interfaces >> NI-DAQmx Devices, right-click on your device and select Properties.
- Modify the power-up state.
- Click OK to write the settings to the device.

Setting power-up states in LabVIEW:

- Place the NI-DAQmx Set Power-Up States VI on the block diagram.
- Set the inputs "device in" and "power up states"
- Add additional VIs to perform any other tasks within your program.
- Run the program to write the settings to the device.

Please let me know if you have any questions. Have a great day!
Sincerely,
Marni S.

[trujillo66]

Hello all,
 
I have the same problem, but,
when I execute MAX, the "properties option" is disabled.
 
Devices and Interfaces / NI-DAQmx Devices / NI USB-6501: "Dev1" >> Properties (disabled)
 
?
 
Sincerely,
Domingo Trujillo

[McKala [DE]]

The DAQmx channel property node includes the Digital Output tristate
property.  This property stops driving a line and sets the output
to high-impedance.  You must committ the task for the setting to
take effect and this property can not be set when a task is
running. 

The Digital Input tristate property causes NI-DAQmx to tristates the lines in the channel. If you set this property
to FALSE, NI-DAQmx does not modify the configuration of the lines even if the
lines were previously tristated. Set this property to FALSE to read lines in
other tasks or to read output-only lines.

Good luck!

[McKala[DE]]

Hello jhy,

In Hal's post, he said "As David said, the power-up state of the USB-6501
is always high impedance. This means that the digital lines are not
driven high or low."
When a line is not driven, it is floating and the measured voltage is not known. 

Regards,

[Rando]

How to set the power on state to Low ? I used as read port.
 
YC Heng