Can the output voltage during boot-up of the CFP-AIO-610 module be held to zero?

[mccandlt]

During power on or reset of the system the analog outputs go to 10V instead of 0V. Once the system is up and resonsive the default value kicks in and the level goes to 0V. Is there a way to keep the voltage near zero during a reset?

[Sean_C.]

Hello,

Thank you for contacting National Instruments.

Do you have your Power-Up State Value set to 0 Volts? This should keep the output voltage at 0 until a new value is written to it.

Let me know if this does not work.

Sean C.
Applications Engineer
National Instruments

[mccandlt]

As far as I can tell the power up state is set to 0V. It seems like it does not change until the cFP is fully booted up. Once the LED's on front go to "ready" the level changes to 0V.

[Sean_C.]

When the voltage is reading 10V, do you have any load connected, or is the output channel connected directly your multimeter/scope? If the channel is left open, that might lead it to charge to the positive rail (10V). Try putting a resistor across the output terminals and see if it still reads 10V during boot up.

Let me know the results...

Thanks,

Sean C.
Applications Engineer
National Instruments

[Sean_C.]

This is a known issue with the cFP-AIO-610. It is currently being researched by the developers to find a solution.

Thank you,

Sean C.
Applications Engineer
National Instruments