topic Re: Limiting AGV Movements to Specific Take Points and Enforcing Mandatory Passages in FlexSim Forum

Limiting AGV Movements to Specific Take Points and Enforcing Mandatory Passages

hajer_benyounes — Wed, 07 Aug 2024 21:20:49 GMT

[ FlexSim 24.2.0 ]

Hello , how can I limit triggering the movement of the AGVs to only Take Point A1 and Take Point A5 upon the arrival of a cart?

I also want the AGV to be required to pass through Take Point A2 once it arrives at Put Point A2, and the same for A6.

In other words, the AGVs can only move to complete an entire mission.

Exemple : Mission 1

1) Take Point A1

2) Put Point A2

3)Take Point A2

4) Put Point A1

PS:It works when I set the same constant arrival time for all sources, but it doesn't when I try to test lognormal loi normale.fsm.

Thank you in advance!

Re: Limiting AGV Movements to Specific Take Points and Enforcing Mandatory Passages

moehlmann_fe — Thu, 08 Aug 2024 07:24:07 GMT

Short answer: Don't use the AGV Process Flow template.

Longer answer: The AGV template implements a specific 'patrolling' behaviour for the AGVs. If that is not what you want, it is most of the time easier and faster to build a custom Process Flow logic from scratch than to try and adjust the template to fit your needs.

In this case all you need are three blocks: Pull an item from the AGV work list that is in either A1 or A5 and move it. Then pull an item from A2/A6 and move it and lastly give the AGV a task to return to its park position which can be preempted if another item becomes available at A1 or A5.

To pull from the correct queue I added an expression field to the AGV list that shows the name of the queue the item is in. This is then compared to a label on the pulling token in the Pull from List query.

loi-normale_1.fsm

I removed the Process Flow with delay tasks for now. At least the ones at the pickup/dropoff points are probably better integrated into the transport logic flow. If the others are supposed to represent a rotation time then you can use the option Rotation Tresholds in the AGV Network properties. Otherwise I still think waypoints (also in the AGV Network properties) might be a better way to integrate those delays.

Re: Limiting AGV Movements to Specific Take Points and Enforcing Mandatory Passages

hajer_benyounes — Thu, 08 Aug 2024 11:42:23 GMT

Hello @Felix Möhlmann,

Thank you so much!