Confused with the "push to /pull from List" and "NextLookForWork Loop"

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K_yun asked Jul 12, '19 Braydn T commented Jul 31, '19

Confused with the "push to /pull from List" and "NextLookForWork Loop"

As you can see in the photo above, The items created by the three sources are pushed to the list("ItemList1"), but the "ItemList1 Entries" table shows nothing during the simulation run. Same thing happens to "AGVWork Entries"table. Straight to the point , as the "Push to/Pull from list" mechanism(push missions onto the list, and pull te to execute it) being used in mission allocation, why still use "NextLookForWork Loop" mechanism? And when it comes to large scale AGV system simulation , which one suits more?

Software Version:

FlexSim 19.1.0

agv task

001.png (92.0 KiB)

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Answer 1 · 2019-07-12T18:33:10Z

Jordan Johnson answered Jul 12, '19 Braydn T commented Jul 31, '19

In the AGV template, there is a token that always pulls items off the AGV work list as soon as it is pushed on. T token waits on the activity "Get Item from Global List", and then pulls the item, creates a new token, and immediately goes back to wait for more. The list that has your items is calls the Local Partitioned Load list. You can open that list's entries window from the Process Flow view, and see your items in each of their partitions.

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Braydn T commented · Jul 12, 2019 at 12:28 PM

Hey @meng L

Could you upload your model? It is hard to trouble shoot it without being able to see it.

The Next Look For Work is built into the 3D, so it automatically does it but you can push it to a list for more customizable logic.

For a large scale system, the answer is it depends. If your system is still very simple but large scale, then Next Look For Work is great. If your logic is more complicated, then pushing to a list is better, but it really depends on your situation.

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K_yun Braydn T commented · Jul 15, 2019 at 10:32 AM

agv-network.fsm

Hi @Braydn, here is the model i've modified, i can not figure out what is going wrong as the simulation starts running, all AGVs take no move.And with crossroads exist in AGV path, how to build nextlookforwork loop ?

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agv-network.fsm (130.0 KiB)

K_yun commented · Jul 13, 2019 at 02:27 AM

Thanks@johnson, i see what you mean. I think now i need more practice to gain a deeper understanding about PF and AGV Template

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