How to request for an item from an unconnected port?

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Sofia G21 asked Feb 27 2025 at 4:14 PM Sofia G21 commented Mar 05 2025 at 8:06 PM

How to request for an item from an unconnected port?

Test Moel - Queue Pull.fsmI have a Distribution Center connected to a Manufacturing space.

The process flow is as follows:

1. Material gets delivered to the DC and is picked up and delivered to racks by AGVs.

2. This material is picked up and delivered to DC Outbound Queue by AGVs. This needs to be on 'need' basis.

3. The material travels on a conveyor and arrives to the Manufacturing space.

4. AGV picks up material from conveyor Inbound queue and delivers material to Floor Storage queue positions (orange).

5. When either Processor 1 or Processor 2 consume all their material, they will need AGV to pick up from floor storage and deliver to their inbound queues (blue).

What I am trying to achieve is:

- Delivery to the DC Outbound queue ONLY when any of the Floor Storage (orange) queues are not full. Currently, the model is automatically feeding the DC Outbound even if all 3 Floor Storage queues are full, and filling the Material Inbound queue. I will need to add other types of material in the future, and I will need that conveyor to remain empty so that other material can be delivered. I only want AGVs to deliver to DC Outbound queue when necessary.

I appreciate any help possible! Thanks super much!

Software Version:

FlexSim 23.0.15

agv pull sequencing logic for delivery.

1740672690728.png (743.5 KiB)

test-moel-queue-pull.fsm (105.2 KiB)

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Answer 1 · 2025-02-28T08:51:13Z

Felix Möhlmann answered Feb 28 2025 at 8:51 AM Sofia G21 commented Mar 05 2025 at 8:06 PM

You can push the items to a list and have the queues pull one whenever they are empty. After teh pull, release the item through port 1 to bypass the Send to Port code. Then make sure that the item arrives the in the queue that pulled it. For example by writing the port the inbound queue needs to release it to onto a label.

test-moel-queue-pull_1.fsm

test-moel-queue-pull-1.fsm (112.9 KiB)

· 3

Sofia G21 commented · Feb 28 2025 at 2:33 PM

Thanks for your response Felix! The first thing I notice (and apologies if it's that my question wasn't clear enough), is that the Floor Storage Queues (orange) are not filling up to their capacity 3. I slowed down the processors, and I am seeing that once there is 1 box in each floor storage queue, then it stops the flow of boxes. I need the flow to stop only when those orange floor storages reach full capacity (3 boxes each in this case). How do I go about that? test-moel-queue-pull-1.fsm

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test-moel-queue-pull-1.fsm (112.9 KiB)

Felix Möhlmann Sofia G21 commented · Mar 01 2025 at 2:09 PM

Create three tokens for each queue. And instead of waiting for the queue to become empty, each token waits for the item it pulled to exit the queue.

test-moel-queue-pull-2.fsm

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test-moel-queue-pull-2.fsm (113.0 KiB)

Sofia G21 Felix Möhlmann commented · Mar 05 2025 at 8:06 PM

Thanks for the response and help, Felix! I accomplished what I needed. I appreciate your time

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