AGV loading multiple items from queue issue

Question

question

Brandon I asked Mar 19 2020 at 7:24 AM Brandon I commented Mar 20 2020 at 6:50 AM

AGV loading multiple items from queue issue

Hey guys,

I have an annoying issue that I'm not sure where I'm going wrong. What I'm trying to do is the same concept as:

https://answers.flexsim.com/questions/21455/how-to-make-the-forklift-transport-more-than-one-i.html

However, I'm trying to make it a lot simpler for myself within the process flow. The problem is that the AGV will go try load, but it will only take just 1 item and unload it, then freeze (probably because of errors being generated somewhere?).

I believe it's got to do with my load & unload instructions using "Object from Label Array" and how its parameterized.

I tried following how they set up the load instruction within the linked question like this according to my Pull from List:

however, I just get the following error:

I also tried used the following inputs instead:

but the "Index" field defaults to "LastEntry" as seen which is why I think it's just taking only one box from the queue.

I've tried creating a label to hold the "token.pulled.length" for the Index so that it doesn't default to the "LastEntry", but I run into the same error as above basically.

I just want to load all items from queue (5) onto AGV and drop them off at the conveyor, rinse, repeat.

I've attached the model with last method I attempted.

Any help would be appreciated, thank you!

Kind regards,

Brandon

agvstackload.fsm

Software Version:

FlexSim 19.0.0

agv process flow list pull queue content stack

loadeerror-with-label.png (9.2 KiB)

1-load.png (17.0 KiB)

loadarray.png (16.5 KiB)

2-label.png (13.9 KiB)

agvstackload.fsm (37.9 KiB)

______

Cookie preferences

Your privacy is important to us and so is an optimal experience. To help us customize information and build applications, we collect data about your use of this site.

May we collect and use your data?

Learn more about the Third Party Services we use and our Privacy Statement.

Strictly necessary – required for our site to work and to provide services to you

These cookies allow us to record your preferences or login information, respond to your requests or fulfill items in your shopping cart.

YES

Improve your experience – allows us to show you what is relevant to you

These cookies enable us to provide enhanced functionality and personalization. They may be set by us or by third party providers whose services we use to deliver information and experiences tailored to you. If you do not allow these cookies, some or all of these services may not be available for you.

YES

NO

Customize your advertising – permits us to offer targeted advertising to you

These cookies collect data about you based on your activities and interests in order to show you relevant ads and to track effectiveness. By collecting this data, the ads you see will be more tailored to your interests. If you do not allow these cookies, you will experience less targeted advertising.

YES

NO

Are you sure you want a less customized experience?

We can access your data only if you select "yes" for the categories on the previous screen. This lets us tailor our marketing so that it's more relevant for you. You can change your settings at any time by visiting our privacy statement

Your experience. Your choice.

We care about your privacy. The data we collect helps us understand how you use our products, what information you might be interested in, and what we can improve to make your engagement with Autodesk more rewarding.

May we collect and use your data to tailor your experience?

Explore the benefits of a customized experience by managing your privacy settings for this site or visit our Privacy Statement to learn more about your options.

Answer 1 · 2020-03-19T08:24:25Z

SudheerReddy answered Mar 19 2020 at 8:24 AM Brandon I commented Mar 20 2020 at 6:50 AM

@Brandon I

I have added Run Sub Flow for loading and unloading. Please have a look into the model and process flow. Attaching the fixed model.

26567-agvstackload.fsm

agvsolved.jpg (57.0 KiB)

26567-agvstackload.fsm (39.5 KiB)

· 3

Brandon I commented · Mar 19 2020 at 8:44 AM

I see it works fine, but I don't understand the need for the sub flow at all, could you maybe clarify why? I thought the sub flow is just to split continuity within the flow. I didn't realize it can send values like that.

Also, for the load section, I see the "Item" input field is now token.item, but I don't see any reference to that within the process flow, why would the label name defined within the "Pull from List" such as "token.pulled" not work?

Thank you for the answer, I appreciate it.

0 ·

capture.png (26.5 KiB)

SudheerReddy Brandon I commented · Mar 19 2020 at 9:09 AM

@Brandon I

token.pulled is array of 5 and your below code is not having reference to all 5 items to load. Instead you are giving reference to only one item as explained below

token.pulled[1] token.pulled[2] and so on are index of pulled items. In similar way your code executes as token.pulled[5]. Because token.pulled.length is 5. So you are giving reference to only one item of index 5.

Where as Run Sub Flow is used to run 5 times so you can get reference to all items in array.

token.pulled[token.pulled.length]

Here Sub flow is used to Load 5 items at once instead of writing 5 times load activity in main loop

In Run Sub Flow, you can see label called item is created with reference to token.pulled[1,2,3,4,5] as creation rank

1 ·

dt.jpg (22.9 KiB)

item.jpg (30.0 KiB)

Brandon I commented · Mar 20 2020 at 6:50 AM

I understand, thank for the clarification! @Sudheer R

0 ·

question