Tokens in list not becoming available

Question

question

Nicholas D2 asked Feb 08 2021 at 4:04 PM Jeanette F commented Feb 16 2021 at 5:27 AM

Tokens in list not becoming available

When 10 flowitems reach WorkCenter89Q, they begin to be processed. One ends up going through the rework process, but when it returns to the InRack89Q to be processed again, the tokens in the Process Flow are not available, so the flowitem is not moving to the processor. I can't figure out why.

(Tip: time is in hours so up the run speed)

MPM-2000 Testing Model_Process Flow_v5.fsm

Software Version:

FlexSim 20.1.2

flexsim 20.1.2 processors global lists

mpm-2000-testing-model-process-flow-v5.fsm (71.0 KiB)

· 5

Nicholas D2 commented · Feb 08 2021 at 4:10 PM

@Jeanette F Adding you because you've seen a previous version of this model before.

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Jason Lightfoot ♦♦ commented · Feb 08 2021 at 5:47 PM

Is this the same as this post?

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Nicholas D2 Jason Lightfoot ♦♦ commented · Feb 08 2021 at 10:03 PM

They are both based on the same model, but are different problems that I am having.

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Jeanette F ♦♦ Nicholas D2 commented · Feb 10 2021 at 11:39 PM

Hello @Nicholas D2,

The models in the two posts are slightly different from each other. The work centers are named differently.

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Jeanette F ♦♦ commented · Feb 16 2021 at 5:27 AM

Hi @Nicholas D2, was Jeanette F's answer helpful? If so, please click the red "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always unaccept and comment back to reopen your question.

0 ·

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Answer 1 · 2021-02-10T23:38:05Z

Jeanette F answered Feb 10 2021 at 11:38 PM

Hello @Nicholas D2,

Your model does process the boxes that come from the rework station. You can see the red boxes leave the in queue.

This is possible because when the box leaves the rework processor there is a trigger that pushes the item back onto the InRack89Q list. So the item can be pulled from the list to the processors.

The token in the Boxes segment of the process flow that represents the item is held back by the Wait for event. The wait for event waits for the boxes to enter the OutRack for that WorkCenter, so no token has moved on untill the item has finished processing correctly in the WorkCenter.

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