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Milosz S2 avatar image
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Milosz S2 asked Milosz S2 commented

Why my "Find slot" isn't working

Hi, I have problem with my model. On 3000 s some ASRS vehicles start to put pallets from racks on the conveyor. When pallet reach conveyor end, it has to be put back on rack with another ASRS. I set the "Find Slot" for empty slot and some other queries, but it doesn't listen to this and put all pallets on the same slot. Where may be the problem?

Query on "Find Slot": WHERE slot.slotItems.length == 0 AND product == $1.pallet.Product AND slot.zoneID == "3" AND slot.aisleID == "3"

MODEL2.fsm

1649710129295.png

FlexSim 20.0.10
queryproces flowfindslot
1649710129295.png (44.6 KiB)
model2.fsm (285.2 KiB)
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You have a lot of exceptions that are not related to the question - but indicate other problems in your model. Can you fix those first? For example you are removing a box from a station before the processing time is finished - the station doesn't like this.

Second - you're issuing a Travel to Object for the ASRS which does not do anything, the ASRS only uses offset travel using either TravelToLoc or Load/Unload tasks. It's often good to build a small test model to prove you understand how to use things - see attached model.

ASRSoffsetTravelExample.fsm

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1 Answer

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Felix Möhlmann avatar image
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Felix Möhlmann answered Milosz S2 commented

You are not assigning the found slot to the pallet. So when the pallet enters the rack, the Slot Assignment Strategy of the rack is used, which puts the pallet into the first slot that has space (items on the pallet don't count for determining the space the pallets needs/takes up).

1649743591681.png

The label "item" doesn't exist on the token. This should read "token.pallet" to assign the found slot.


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Thanks, that helped a lot!
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