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SB Lee avatar image
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SB Lee asked SB Lee commented

ASRS task sequence is not working. (with PF)

I am studying ASRS. And I want to control the model using ProcessFlow.

I wrote ProcessFlow as attached model and screen. When I run it, the following message appears.

1727156468080.png1727156531183.png

time: 100.000000 exception: Label property destination retrieved on token "id:1". Label does not exist. At activity "Travel" in process flow "ProcessFlow".


I need to set Destination to the location where the box stored in ASRS, but I don't know how to do it. Please see the model attached below.

ASRS_PF_Q1.fsm

FlexSim 24.2.1
task sequenceasrs with pf
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1727156531183.png (552.4 KiB)
asrs-pf-q1.fsm (122.3 KiB)
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1 Answer

Felix Möhlmann avatar image
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Felix Möhlmann answered SB Lee commented

You don't need to use the travel activities (nor can you, the ASRS doesn't do travel tasks to objects). Moving to the load or unload location is part of the load/unload task as offset travel.

The extra travel task is only needed if the task executer is connected to a travel network or AGV network. The AGV network does not do offset travel by default and in a travel network you generally first want the task executer to move to the closest network node before travelling to the exact location.

And since the conveyor/entry transfer is defined by the rack, I would get a reference through that rather than use a Case By Label function.

asrs-pf-q1_1.fsm


asrs-pf-q1-1.fsm (121.1 KiB)
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SB Lee avatar image SB Lee commented ·

Thank you for your reply.

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