Re : Input / output synchronization

[arnaud_QC]

Hi,

I need your help to synchronize a digital output with a digital input with LabVIEW 8.2.

• I have a NI6289 PCI board.
• A digital output will behave as the green signal on the following diagram.
• I need to generate the blue signal on a digital output, knowing a rising edge of this signal must be generated a defined time after a rising edge on the green signal (dig. input) (e.g. :  here 15ms). Moreover, a falling edge must be generated a defined time after the same rising edge of the digital input (e.g. : here 35ms).
• The digital output must be generated continuously. Indeed, the digital output will be repeated continuously, and the digital output must continuously behave as the following logical diagram.
• The accuracy needed is one millisecond.
• The green signal (input) frequency is approximately 2Hz, and can vary (< 2Hz).

I assume I need to use the internal timers, but I did not succeed in doing something correct.

Thanks for your help !

[arnaud_QC]

Nobody has an answer to my question ?

[Wayne.C · Accepted solution]

The is an example named Gen Dig Pulse-Retriggerable.vi that ships with LV.  It should be very close to what you want to do.

[arnaud_QC]

Thanks Centerbolt,

that's exactly what I wanted. I didn't see this example before (even though I tried a lot of them) !
Thanks for you help, I needed it !