How to pull from rack with requirement

Question

question

Edwin Purwanto asked Aug 13, '16 Adrian Haws commented Aug 15, '16

How to pull from rack with requirement

Hello,

So to pull with requirement is usually quite straightforwards, but in this case I tried

if (content(item)==1){
return 1;
}

to pull item that has item on it, it does not pull as intended.

My first thought is that in this model, the pointer stuck with the first item on the rack that is not having item on it. If that is the case, how to move the pointer towards another items?

Thanks and best regards,

edwin

test11.fsm

Software Version:

FlexSim 16.1.1

pull with requirement from rack rack pointer

test11.fsm (25.5 KiB)

· 1

Edwin Purwanto commented · Aug 14, 2016 at 04:31 AM

Hello,

I am still having trouble with pull requirement. This model was intended to recycle the container. And so the code on pull requirement:

if (content(node("Queue16", model()))==0&&content(item)==0)
{
	setlabel(item,"dest",1);
return 1;
}

Two problem with this:

1. Eventhough content of Queue16 is already above 1, it is still churning out empty tote. It isnt supposed to be like this

2. How to break pull requirement? I mean if there is already one tote going to fulfill the criterion of content (node("Queue16", model()))==0, the system will send another one as long as it is still in journey. Can we introduce break; to prevent this?

Thanks and best regards,

Edwin

test11.fsm

0 ·

test11.fsm (27.4 KiB)

Answer 1 · 2016-08-13T05:39:43Z

Joerg Vogel answered Aug 13, '16 Joerg Vogel commented Aug 15, '16

I have tested the model. I can't get the model to work just with entrytransfer81, too. If I place a queue as the pulling object between the rack and the conveyor system, the queue pulls the items. It is just a workaround.

· 2

Edwin Purwanto commented · Aug 14, 2016 at 03:38 AM

Yes, this is a good work around, but, are there command to address item in rack? like before, we can use first() to address item in queue or conveyor, but i guess this is not applicable for rack....

0 ·

Joerg Vogel Edwin Purwanto commented · Aug 15, 2016 at 02:24 PM

Sure it is. You have other rack typically link methods like

rackgetitembybaylevel(obj rack, num bay, num level, num itemrank)

if you'd like to test or reference an item in a rack cell. A classic adress method is the rank(container obj, order Number of item or object in the container).

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