random output

îåç

Guest

Î

• Jun 6, 2003

• #1

hi

any one can tell me if its posible to program
random output ? and how ?
on ladder software.
thanks

 

randylud

Member

R

Join Date

Oct 2002

Location

Greensboro,NC

Posts

933

• Jun 6, 2003

• #2

????????????

And you would want to do this for what reason? Random and machine control are not usually compatible unless you are programming a slot machine or some such thing!

 

îåç

Guest

OP

Î

• Jun 6, 2003

• #3

hi
i am going to use it for my aquarium,
i need the random function to switch on pumps
as to make natural waves moves
thanks

 

rogerhollingsworth

Member

Join Date

Nov 2002

Location

Southern Ohio.

Posts

385

• Jun 6, 2003

• #4

Random

I don’t think you can program anything to be at random. You can program a near endless number of patterns but anything you program will have some form of logic to it thus it will not be at random.
So my answer to RANDOM is no.

Roger

 

Eric Nelson

Lifetime Supporting Member + Moderator

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Apr 2002

Location

Randolph, NJ

Posts

4,346

• Jun 6, 2003

• #5

This topic has been discussed before... Try THIS THREAD

Sounds like a cool project!...

beerchug

-Eric

 

gbradley

Lifetime Supporting Member

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Apr 2002

Location

Corona, Ca.

Posts

1,637

• Jun 6, 2003

• #6

Also see This Thread
Good luck!

 

îåç

Guest

OP

Î

• Jun 7, 2003

• #7

o.k guys

so there can't be a real random function so
i will have to use a random like program.
the problem is i don't know how to create it
because i am a beginner, and that project is my
first encounter with ladder programming.
if any of you guys have the time to draw it for me
i will be thankfull.
by the way, i have the www.unitronics.com vision 120 oplc.
i woun't be able to draw it for my self so i need the
'' engine net '' of the random like program in a ladder.
thanks guys

 

BobB

Lifetime Supporting Member

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Jun 2002

Location

Sydney

Posts

4,557

• Jun 7, 2003

• #8

Does your PLC have an increment command that can be fired from a leading edge trigger? (Diff Up).
beerchug

 

îåç

Guest

OP

Î

• Jun 7, 2003

• #9

yse
i have increment command
it has 3 legs
1. en
2. eno
3. memory integer
thanks

 

BobB

Lifetime Supporting Member

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Jun 2002

Location

Sydney

Posts

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• Jun 7, 2003

• #10

Here is a programme that I use regularly to generate random numbers in Omron PLCs. @ means diff up, difu means diff up. The other functions should be pretty clear. There is a limitation ri=outine in there to limit random numbers between presets.
Good luck

beerchug

 

îåç

Guest

OP

Î

• Jun 7, 2003

• #11

thank you
got it
i will let you know what i came up with
thanks again

 

îåç

Guest

OP

Î

• Jun 7, 2003

• #12

BobB
i am sorry
i understand nothing of it
i dont know how to put that in a ladder
to complecated for me.
please,if you can send me a ladder net with only
the ' engine' ,i will be able to continue for what
i need
thanks

 

BobB

Lifetime Supporting Member

Join Date

Jun 2002

Location

Sydney

Posts

4,557

• Jun 7, 2003

• #13

îåç

That is the engine. Leave it with me and I will see if I can describe each portion to you in the next couple of days. It is a long weekend in Sydney and my wife has many things organised for me to do but I will find time to send you some more info.
beerchug

 

îåç

Guest

OP

Î

• Jun 7, 2003

• #14

thank you bobB
i will wait

 

îåç

Guest

OP

Î

• Jun 7, 2003

• #15

i need 3 random like outputs
if anyone have only one please send it
on a ladder net so i can cut and paste
to my ladder project.
the software is : www.unitronics.com
thanks