Having trouble pulling from list (AGVs)

Question

question

andresantos asked May 24 2023 at 12:26 PM andresantos commented May 24 2023 at 3:42 PM

Having trouble pulling from list (AGVs)

Hi.

I'm trying to develop a parking site for AGVs. Right now, I want the AGV to check if parking is available, if it is, go there, if it's not, wait until there's parking available.
I'm having some trouble trying to pull a parkPoint from a list. Note that I'm using a new custom process flow because I was having trouble implementing the AGV template for my model.

Down below I uploaded some pictures regarding my issue. Hope you can help me. Cheers!

Software Version:

FlexSim 22.2.4

agv list pull from list flexsim22

1684931073089.png (52.2 KiB)

1684931090958.png (8.5 KiB)

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Answer 1 · 2023-05-24T14:25:05Z

VikSin answered May 24 2023 at 2:25 PM andresantos commented May 24 2023 at 3:42 PM

Can you describe a little bit more the problem you are facing ?

I will use a max wait time in this situation. Token will try to pull for specified time and if it fails in pulling after that, it will be send to another process. When you use max wait timer, the pull from list object behave as a decide object.

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andresantos commented · May 24 2023 at 2:37 PM

Thank you for the answer.
I want to make a car inspection center but right now I'm focused on making a simple parking for when the cars arrive.
I think my main issue is I don't quite understand how i can pull an object from a list that matches my criteria (The SQL Query), e.g. The park spot needs to be available in order for me to pull it.

I could submit my model, but it has some portuguese mixed in the English so it could be hard for you to comprehend. Anyways, thanks for the input!

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Jason Lightfoot ♦♦ andresantos commented · May 24 2023 at 3:16 PM

The sql for pulling only values with isAvailable being true is

WHERE isAvailable

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andresantos Jason Lightfoot ♦♦ commented · May 24 2023 at 3:41 PM

Sure, but I've tried many different queries, and none seem to work...In the end i can see in the back order details that the request from the puller has the label "failed" with the number 1 attached to it.
So, I assume I must be using the process flow block wrong... I'll keep you noticed, thanks for the help!

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VikSin andresantos commented · May 24 2023 at 3:34 PM

I post a model example of pulling of free parking spots from list using max wait timer.

carparking.fsm

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carparking.fsm (40.3 KiB)

andresantos VikSin commented · May 24 2023 at 3:42 PM

Oops, I actually have version 22.0.12 installed instead of the one I said earlier...
I will try to download a newer version so I can open your model.
Thank you!

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