Blocked Task executers

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question

Enrique Da asked Apr 13, '22 Ryan Clark commented Apr 14, '22

Blocked Task executers

Hello, can you give me a hand with this?

I had an executer (ex4) doing two tasks (processing and carrying stuff) at the same time so, when the processor had two items ready to be processed, ex4 operations were blocked. I think that maybe he had to choose between processing one of the two elements in the queue and he couldn’t do anything bc both tasks had the same priority… At first I tried changing preemption priorities bc I thought that the problem was choosing between processing or carrying but, after applying a color change to the processor's output,I realized that both objetcs were in queue to be processed. I would be very happy if someone can give me an answer, thanks

Software Version:

FlexSim 22.1.0

processor task executer blocked

task-executers.fsm (62.5 KiB)

Answer 1 · 2022-04-14T07:22:23Z

Felix Möhlmann answered Apr 14, '22 Ryan Clark commented Apr 14, '22

The problem is that the operator is unable to load the box from the stopped processor. If the transport task sequence is assigned ahead of the "utilize" sequence, this leads to the blocked state you encountered. Both the operator and processor wait for each other.

As a workaround, you could add a queue directly behind the processor and have the operator transport items from there to the final queue. This prevents the items being stuck in the stopped processor.

task-executers-fm.fsm

1649920934783.png (28.9 KiB)

task-executers-fm.fsm (61.1 KiB)

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Enrique Da commented · Apr 14, 2022 at 05:15 PM

Thank you! that's what I was searching for, very clear explanation and the modified model helped even more :)

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Ryan Clark Enrique Da commented · Apr 14, 2022 at 08:03 PM

Hi @Enrique Da,

I'm glad Felix's answer was helpful! In the future, please be sure to respond to any answers by using the Comment button rather than writing a new answer. That helps to keep things organized. Also, if an answer is helpful, please click the Accept button under that answer to indicate that your question has been resolved. Please see Best practices for using this Answers site - FlexSim Community for more info. Thanks!

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