How to reevaluate a pull condition when pulling from a global list

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Gabriel Morgante asked Apr 3, '20 Gabriel Morgante commented Apr 8, '20

How to reevaluate a pull condition when pulling from a global list

Hello guys,

I'm trying to use a Condition on a pull strategy "From list" and it's not working as I thought it should.

Explanation:

Processor1 have two labels "Capacidade" and "Carga" (Cap and load respectively), so the condition is that it should pull itens from a Global List if Load < Cap, as it follows:

All the itens arriving at the processor increase the "load" a certain amount until it reaches the condition and then it stops pulling.

The problem starts when the itens exit the processor, as every exit subtract a certain amount from the "load" label, the condition changes and the processor was suposed to pull more itens but it doesn't.

I think it should work if there's a way to force the processor to reevaluate the condition when after every exit but I'm struggling to find a way to do it.

The model attached is a simple replication of the real model, but the original model have many processors that's why i'm using the Item List, because It would be very troublesome to use connections to decide the flow of the itens on the model.

I hope someone can help me, thanks!

l3-1.fsm

Software Version:

FlexSim 19.0.0

pull strategy global list pull item pull from list based on condition push to list pull from list

1.png (8.0 KiB)

l3-1.fsm (26.1 KiB)

Answer 1 · 2020-04-03T21:57:43Z

Matt Long answered Apr 3, '20 Gabriel Morgante commented Apr 8, '20

In your OnExit trigger of Processor1 you can add a Code Snippet and call receiveitem(current); This will cause the processor to try and pull the next flowitem, firing the pull requirement.

receiveitem.png (6.0 KiB)

· 5

Gabriel Morgante commented · Apr 03, 2020 at 10:20 PM

Hey Matt! Thank you for your answer!

What you said works for the processor to call one next item but it doesn't apply the "pull strategy" that was supposed to pull itens until "load" becomes equal or greater than "cap". Any idea how to trigger the pull strategy?

Maybe there's something to do with the list? Is there a way to reevaluate all the entries awaiting on the list?

Thanks!

0 ·

Matt Long Gabriel Morgante commented · Apr 07, 2020 at 02:43 PM

Just add an additional receiveitem(current); call to the OnEntry trigger of the processor. If the processor is at capacity it'll return false in the pull strategy.

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Gabriel Morgante Matt Long commented · Apr 08, 2020 at 06:03 PM

It worked! Thanks Matt! =D

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Braydn T Gabriel Morgante commented · Apr 07, 2020 at 02:11 PM

Could you put that command in a for loop or while loop? while (carga < capacidad){

receiveitem(current);

}

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Gabriel Morgante Braydn T commented · Apr 08, 2020 at 06:02 PM

Thanks @Braydn T but Matt's answer worked perfectly now! =)

0 ·

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