About how flow items flow and trigger port settings

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question

tomonori S asked Feb 17 2021 at 12:16 PM tomonori S commented Feb 22 2021 at 10:23 AM

About how flow items flow and trigger port settings

In the attached model, two items are brought to "Processor B", and the items are processed one by one in the subsequent process.
One item stays in "Processor B" and releases the item in "Processor B" after the preceding item has been processed by "Processor F".

In the current attached model, the simulation stops after a series of flows, but I would like to repeat this.
(The input port of "Processor B" is closed, but I don't know the proper setting method to open the port.)

test_01.fsm

Software Version:

FlexSim 20.1.3

flexsim 20.1.3 trigger close and open ports subnodes

test-01.fsm (35.8 KiB)

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tomonori S commented · Feb 18 2021 at 2:16 PM

I'm sorry. The explanation was insufficient.
A new model is also attached, but as you can see in the image, processors B and F are in red circles.
I want the operator to always carry two items to "Processor B", but after the first time, they will carry one item at a time. (I want to carry two items after the last item has left "Processor B")

test_02.fsm

1 ·

test-02.fsm (35.7 KiB)

img-01.png (213.4 KiB)

Jason Lightfoot ♦♦ commented · Feb 17 2021 at 2:42 PM

First of all there is no processor B or F in the model so how should we identify it?

Secondly when it stops there are no objects in the entire model whose input is closed.

We're going to need a fuller description to help you.

0 ·

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Answer 1 · 2021-02-18T22:18:03Z

Jeanette F answered Feb 18 2021 at 10:18 PM tomonori S commented Feb 22 2021 at 10:23 AM

Hello @tomonori S,

You had the right idea to use triggers. You are opening the input to Processor B too soon though. You want to open the input when Processor B is empty so two boxes can be transported and processed at the same time. So you will need a trigger that opens the input after it confirms that Processor B is empty.

The problem then is to figure out what event should you set the trigger onto. You would think that placing this on the On Exit Trigger would make sense but this is where you would need to know the order of events. Send To Port -> Transport Resource -> On Exit -> On Load. This means that the item has not been loaded by the time the on exit trigger fires and the processor still has an item in it. We need the On Load trigger to check and see if the processor is empty. The on load trigger can be found on the operator.

test-02_v1.fsm

1613672645658.png (18.5 KiB)

test-02-v1.fsm (528.6 KiB)

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