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This model is an example how to build a virtual storage with a number of racks.
A virtual storage/rack has no items/pallets in it just the information/data for the items are stored. If in a rack cell is some content an orange cube is drawn to visualize that there is content but there is no item. If an item is needed for transport (take items out of the rack) the item is created and a tasksequence for the transporter.
In this example the data for the racks are not stored in Global Tables but directly in the tree (node /Tools/VirtualRacksData) like a Global Table. The difference is that the tree can hold multiple data for one cell where a Global Table has only one information (so more than one Global Table is needed).
Every cell holds the information PalletID, NumOfBoxes (on the pallet) and Release (Flag if pallet is already released or not, which is not really necessary because also the PalletID could be used which is set to Zero if a Pallet is generated and therefore ready to release).
In the UserEventInitVirtualRacks the tree for holding the data is built and also filled with some stock at the beginning of the simulation.
With the Release-Pallet-Button on the Model Control GUI the user can release pallets from a random rack, bay and level. An item/pallet (color red) is generated and released and the standard transport tasksequence is used to make the transportation to the Sink. The load time of the operator is calculated and depends on the number of boxes on a pallet.
The release of pallets is done in the UserCommand ReleasePallet(), where a variable defines the maximum number of search loops (iWhileLoopLimit). If this value is small it can happen that there are still pallets to release in the racks. A message appears if this happens. If no pallet is left to release the same message appears.
Attention:
Do not delete or rename the object Logo_FlexsimD, because otherwise the model will not work correctly. Also do not rename, delete or rerank other objects.
