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How to set up sequential using PCI 6251

Hi there

I am fairly new to NI and I'm kinda lost

I am currently using a PCI 6251 and LABView 6

I need to apply a sequential logic to the system to activate my switches

I want to use the first 16 DOs and the system goes as such:

The first four bits would count up from 0000 to 1100 and each time an increment is made, the other 12 Dos would count up consecutively and it repeats itself.

Example : lets starts with 0000 (first four bits)

000000000001

000000000010

000000000100

untill

100000000000

then the first four bits would increase by 1 again to 0001 and the other 12 bits would go start the count again, the same as the one before. 

Untill the first four bits is at 1100 and all the system is stopped. 

 

Its so sequential but I dont know how to tell arrange the programs as such that it would understand all the sequences I wanted.

 

I hope that you guys could help me

Any references would also be appreciated.

Thank you in advance.

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