No slot was assigned to item - how to handle when no slot is found

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Anna Kamphaus asked Apr 25, '24 Anna Kamphaus commented Apr 25, '24

No slot was assigned to item - how to handle when no slot is found

I am using process flow to have a transporter pickup a pallet and put it on a shelf. When it runs out of the room I get an exception but it doesn't stop the model. I am wondering how I can add code to handle this exception to redirect everything else to an overflow queue instead.

It's not clear if allowing it to assign the slot in the unload is the correct approach.

This may be overall the wrong approach to allow it to select the slot in this way. I tried to use the "Find Slot" block but I wasn't sure how to then direct the unload to use that slot without getting a NULL for the station.
Store in racking slot exception.fsm

Software Version:

FlexSim 24.0.2

storage system processs flow rack storage storage slot

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store-in-racking-slot-exception.fsm (47.0 KiB)

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Joerg Vogel commented · Apr 25 at 04:38 PM

Add under Query in FindSlot a Where (Filter) condition called "Slot with Space"

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Answer 1 · 2024-04-25T16:33:30Z

Joerg Vogel answered Apr 25, '24 Anna Kamphaus commented Apr 25, '24

Activate Use Max Wait Timer in FindSlot activity

Template of On Max Wait Timer: Release token to second Destination.

Add another connection from findslot activity to an assign label activity.

Insert an assign label activity between findslot and load activity. In each of added assign label activities you add a label for an individual destination. Both must be connected to load activity.

Unload activity reads as destination the new assigned label for a destination.

second-destination-findslot.jpg (37.3 KiB)

· 4

Anna Kamphaus commented · Apr 25 at 05:55 PM

Do I need to use token.slot in the destination rack?

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Anna Kamphaus Anna Kamphaus commented · Apr 25 at 06:21 PM

this didn't work either

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Felix Möhlmann Anna Kamphaus commented · Apr 25 at 07:11 PM

To get the rack object (unload destination) use " token.slot.as(Storage.Slot).storageObject".

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Anna Kamphaus Felix Möhlmann commented · Apr 25 at 09:04 PM

Thanks, that did it!

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