topic Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path in FlexSim Forum

Pick up 2 boxes from queue using a TaskExecuter on AGV path

cameron_seams — Fri, 24 Feb 2017 00:03:17 GMT

I am trying to pick up 2 boxes from a queue using a TE on an AGV path. There are 5 TE's that each need to pick up 2 boxes.

I have tried changing the queue to perform batching as well as altering the TE capacity to 2. This does not work.

Any help is much appreciated.

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

cameron_seams — Fri, 24 Feb 2017 00:13:18 GMT

Also, the queue has a capacity of 2 boxes

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

joerg_vogel_HsH — Fri, 24 Feb 2017 02:08:58 GMT

You tried also to set Break To Requirement to the same load station and to look for at the dispatcher of the AGV.

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

joerg_vogel_HsH — Fri, 24 Feb 2017 02:28:36 GMT

The character of an AGV system is that transport tasksequences are distributed to the TEs each time if one is available for a tasksequence to transport one item. Therefore if you know that there are two transport tasksequences you have to dispatch manually the second transport tasksequences to reserve it for the TE when the first transport tasksequence is transferred to the TE. Then you change the break tasks parameters of the first tasksequence that it breaks to the second tasksequence automatically. Please look for tasksequences in the manual especially for the tasktypes quick reference TASKTYPE_BREAK and the command movetasksequence. A good practice is it to close the input of the TE when the TE gets its first new transport tasksequences otherwise the TE might get a second transport tasksequence by the dispatcher.

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

cameron_seams — Fri, 24 Feb 2017 21:51:28 GMT

agv-loadunload-multipleitems-example.fsm

Jorg, I have attached a basic sample model for you to take a look at. I seem to be missing some of the logic in your description above. Your help is much appreciated as I am newer to modeling the AGV systems.

As you can see in the sample attached, the AGV's cannot load 2 boxes, then drop two boxes off. They are capped at maximum 1 box.

@Jorg Vogel

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

michael_kramer1 — Fri, 24 Feb 2017 22:52:13 GMT

Cameron, here's a simple version using Process Flow.

agv-loadunload.fsm

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

cameron_seams — Fri, 24 Feb 2017 23:36:03 GMT

Michael,

Thank you for the example. Is it possible to do this without process flow? Thanks!

@Michael Kramer

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

michael_kramer1 — Fri, 24 Feb 2017 23:53:11 GMT

Cameron, you could add a combiner to your model then add a source of pallets as the first input, the boxes as the second input, and set the "From Input Port 2" on the combiner to whatever you want.

agv-loadunload-1.fsm

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

cameron_seams — Sat, 25 Feb 2017 00:22:51 GMT

This works great and is just what I was looking for. Thank you

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

jing_chen — Sat, 25 Feb 2017 06:19:51 GMT

Cameron,

I use another method to do it without processflow. No dispatcher, combiner and pallet, I think it can make your model look clarity.

agv-loadunload-2.fsm

By the way, I report two code errors in option "First Available Unless Preempting" of PassTo trigger in Dispatcher. @Matthew Gillespie

The above pic is the right code, and the below is the wrong one.

A missing "(" in Line14.

A redundant ")" in Line26.

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

daniel_saravia — Wed, 17 Jan 2018 21:30:25 GMT

I have the same issue. Can you clarify? or gives an example so we can copy the code.

Re: Pick up 2 boxes from queue using a TaskExecuter on AGV path

kevin_lavely — Tue, 23 Jan 2018 14:21:49 GMT

TE properties allows you to specify capacity, I have 3 systems multiple TE's in each system. One carries 2, another 6, and another 4. also you can specify load and unload time. Load unload times are per part ie: Capacity 2 Load time 30 Actual 2*30=60