Control Transporter when idle

Question

question

laitriminh asked Nov 09 2023 at 12:14 PM laitriminh commented Nov 10 2023 at 3:00 AM

Control Transporter when idle

Hello, Flexsim community, I've received help from the community, and I have a Flexsim model, version 2019, which I have attached. I'm facing an issue where I want Transporter1 to work together with Transporter2 to move items from Queue3, 4, 5, and 6 to the Sink when Transporter1 is "idle". Additionally, Transporter1 should still follow the settings in the FixResource when a task requires it. I've attached the Flexsim file version 2019 for your reference. I really appreciate and hope for your assistance.

Besgard,

laitriminh

Process Flow.fsm

Software Version:

FlexSim 19.0.0

transporter processs flow list pull fixed resource idle

process-flow.fsm (43.2 KiB)

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Answer 1 · 2023-11-09T14:37:55Z

Felix Möhlmann answered Nov 09 2023 at 2:37 PM laitriminh commented Nov 10 2023 at 3:00 AM

Connect the queues 3-6 to a dispatcher and the dispatcher to both forklifts.

In the Process Flow, instead of giving individual tasks to the forklift, combine them into a task sequence with a higher priority than the tasks generated by queue 3-6.

process-flow(1).fsm

process-flow1.fsm (44.2 KiB)

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laitriminh commented · Nov 09 2023 at 4:26 PM

I appreciate it, Felix. Because I want Transporter1 to carry 150 boxes at a time, I adjusted the capacity to 150. However, I encountered an issue where, during transportation from Queue3 to Sink, Transporter1 only drops 1 box into the Sink and carries the remaining 149 boxes back to Queue2, repeating this pattern. I've attached the file below, and I'm really hoping for your assistance, Felix.

process-flow2.fsm

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capture.png (322.7 KiB)

Felix Möhlmann laitriminh commented · Nov 09 2023 at 6:56 PM

Hm, didn't think about that. Every item that is moved from queue3-6 has its own separate task sequence. The task executer loads more than one because after it loads an item there is a "break" task inserted in the task sequence, at which point the TE can check if there are other pending task sequences it can start. Which task sequences are eligible is controlled through the "Break To" setting of the TE.

So after the transport unloads one of those items, this is actually the end of that task sequence and the TE will look through its task sequence queue for the highest priority sequence and resume it. If at this point it has received the task sequence from the Process Flow it will start it (higher priority) before unloading any of the other items.

The best I can think of right now to work around that is to bundle the transport from queue3-6 into one singular task sequence in Process Flow as well. That way, the transport should always fully unload before starting any new task.

process-flow(2).fsm

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process-flow2.fsm (55.0 KiB)

laitriminh Felix Möhlmann commented · Nov 10 2023 at 3:00 AM

I understand what you mean. So appreciate the things you do. Thank you so much, Felix. And I hope you have a great day ahead.

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