How to create a advanced setup?

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Rafael de Assis asked Jul 2, '23 Rafael de Assis commented Jul 5, '23

How to create a advanced setup?

Hello Everyone!

I'm simulating a work station of painting. There are some peculiars things in this process:

- There are created 5 diferents flowitens;

- gray flowitems are soft, so these flowitems are moved with an operator and this flowitens are process in processor "Pintura" and processor "Secagem", only a time;

- White flowitems are heavy, so these flowitems are moved with a crane and this flowitens are process in processor "Pintura" and "Secagem", only a time;

- Blue flowitems are heavy like white flowitems, but this flowitems are process in processor "Pintura e "Secagem", 2 times;

- Orange flowitems are heavy like white flowitems, but this flowitems are process in processor "Pintura" and "Secagem", 3 times;

- Green Flowitens are heavy like white flowitems, but this flowitems are process in processor "Pintura" and "Secagem", 4 times.

- for to obey, the flowitems change a label in some queue every time that 1 round (Processor "Pintura" and "Secagem" are concluded.

I am trying use "If Item Label Value Changes (values are set)", for this, I changed the code. I don't know what, but I doing something wrong. when some flowitens (blue, orange or green) go to second round, the simulaton doesnt recognize the label in globaltable. Modelo Avançado V17.fsm

Software Version:

FlexSim 21.1.5

setup time setup advanced setup

fugure-1.jpg (11.3 KiB)

figure-2.jpg (21.4 KiB)

modelo-avancado-v17.fsm (150.8 KiB)

Answer 1 · 2023-07-03T06:28:27Z

Felix Möhlmann answered Jul 3, '23 Rafael de Assis commented Jul 5, '23

The Setup Time option works correctly as far as I can tell. The issue in your model is that the Process Flow does not check if "Pintura" is empty before moving another item onto it. If a second item is starting to be processed, the Process Flow section below will lock the model, because the first token has acquired the "Pintor". It will never release him because the first token has stopped the processor causing a deadlock.

Before unloading to "Pintura", you can use a Wait for Event activity to make sure the processor is actually empty.

capture2.png (15.2 KiB)

capture1.png (10.9 KiB)

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Rafael de Assis commented · Jul 03, 2023 at 11:56 PM

Hello Mr Felix

I did in process flow this check. in figure below, I circled a wait for event..

but I tried your option with a arrow. the result was the same.

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figure-3.jpg (42.8 KiB)

Felix Möhlmann Rafael de Assis commented · Jul 04, 2023 at 06:31 AM

You are right, I misread the issue. The actual problem is that the 3d-port-logic ignores the object that was placed on the processor by the Process Flow.

I would suggest to unify the logic for both input queues. This is both safer and probably in the long run also simpler than adding a bunch of checks to try and have the different input logics work correctly with each other.

In the attached model I also have Queue1 push its items to the "Caixas2" list. The "pintura" processor pulls from this list. The only difference between the queues is the transport reference. Queue1 still just uses the fixed reference as before. "bufer de entrada" is set to create a token in the Process Flow instead of dispatching a task sequence. The code is a stripped down and adjusted version of the default "Use Subflow" option.

This way the pull logic on "pintura" manages all inputs and there is no danger of overloading the processor.

modelo-avancado-v17-pull-fm.fsm

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capture1.png (10.7 KiB)

modelo-avancado-v17-pull-fm.fsm (149.2 KiB)

Rafael de Assis commented · Jul 04, 2023 at 11:59 PM

Mr. Felix,

Now it is working perfectly. I have one more doubt.

what means de messege below. I start this model sometimes and after 2 days os simulation, appear this messege.

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figure-3.jpg (49.0 KiB)

Felix Möhlmann Rafael de Assis commented · Jul 05, 2023 at 06:04 AM

Hard to say. It's an 'internal' error that is (as far as I can tell) not caused by any wrong input of the user (at least not directly).

The message refers to the conveyor system. Did you add conveyors to the model? Sometimes saving the model adn restarting FlexSim fixes this for me. Other times replacing the conveyor section that causes the message helps (though you can't see which one is responsible, so you might have to replace all). If the error only happens sometimes and there are no detrimental effects and the model continues to run correctly, this is an error I sometimes just ignore in that case.

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Rafael de Assis Felix Möhlmann commented · Jul 05, 2023 at 11:58 PM

OK, thank you so much!

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