How can I send flow items in a certain order downstream?

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Rocio A asked Mar 3, '20 Rocio A commented Mar 6, '20

How can I send flow items in a certain order downstream?

I am trying to send flowitems (using AGVs and a dispacther) from the Queue1 to Queues 2, 3 and 4(please, see the model attached) in a certain order but in my model, AGVs pick up in the order they want.

I also attach two pictures with the order in the Queue 1 I want to send downstream (picture named 1.png) and the result of the pick up (picture named 2.png)

Software Version:

FlexSim 19.1.1

#agv #sendtoport

1.png (297.6 KiB)

2.png (305.6 KiB)

10.fsm (237.6 KiB)

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Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Jeff Nordgren commented · Mar 03, 2020 at 05:53 PM

@Rocio A,

A little more information about exactly what is supposed to happen in your model would be very helpful. Like, what order or how do you want flowitems to leave Queue1? It's hard to give you an answer without knowing exactly how you want the flowitems to move out of Queue1. So if you can explain a little more about what you need the model to do, that would be very helpful.

Thanks.

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Rocio A Jeff Nordgren commented · Mar 04, 2020 at 07:40 AM

Hello @Jeff Nordgren. First of all, thank you for your answer.

The flow items come from the rack1 (and the source6, only for the start of simulation) to the queue1 in the next order: Type3 (blue), Type2 (green) and Type1 (red); and would be sent downstream by the AGV´s in groups of 3 items grouped in the same order. And we don´t get that.

Thanks

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Answer 1 · 2020-03-05T22:00:47Z

tannerp answered Mar 5, '20 Rocio A commented Mar 6, '20

Hi @Rocio A,

Thanks for the description of your process. I think you could devise some kind of custom Process Flow to achieve the logic you're describing. It's likely going to be easier than using 3D logic. I've created a clunky but straightforward example and attached it to this post.

There are two tokens created at the beginning of the model that represent each of the 2 AGVs in the first loop of the model. The Pull from List activities pull one item of each type using partitions (shown below), then each of those items are subsequently loaded and unloaded in their respective queues (based on my understanding of what you described). Let me know if you have any questions about this model.

agv-certain-order.fsm

pull-by-partition2.png (20.9 KiB)

agv-certain-order.fsm (243.0 KiB)

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Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Rocio A commented · Mar 06, 2020 at 09:02 AM

Hello @tanner.p:

Althoug clunky, your answer was good to me.

Thank you so much.

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