Are there 1-shots on Allen Bradley Pico PLC's?

zimmerjf · Dec 3, 2004

hello,

new guy here...Are there 1-shots on Allen Bradley Pico PLC's?

If not, is there a simple circuit that I could build to act as a 1-shot?

Ron Beaufort · Dec 3, 2004

maybe ...

sorry I don't have more time ... but take a look at page 4-48 [Adobe Reader page 106 of 190] of the

PICO User Manual

I have NO experience with PICO ... but this looks promising ...

good luck ...

Steve Bailey · Dec 3, 2004

I don't know whether the Pico's instruction set includes a one-shot, but here's a generic method to roll your own.





 Event Lockout        One-Shot

--] [----]/[------------( )-



 Event                Lockout

--] [-------------------( )-

elevmike · Dec 3, 2004

If the "event" is driven by a mechanical switch or pushbutton you may want to setup an anti-bounce circuit to your code.





 Event Lockout        One-Shot

--] [----]/[------------( )-



 Event                Lockout

--] [-------------+------( )-

                  |                 

 lockout  ABT     | 

--] [-----]/[-----+ 



 Event            ABT  

--]/[-----------[timer]

                1/2 sec

g.robert · Dec 3, 2004

Pico does not have one shot built in. The examples shown in the other post will do what you want and reset itself after each power re-cycle.

You could add another trigger to reset other than power cycling.

Are there 1-shots on Allen Bradley Pico PLC's?

zimmerjf

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Ron Beaufort

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Steve Bailey

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elevmike

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g.robert

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