AGV did not drop off items

Question

question

Glenson G asked Dec 14 2022 at 7:20 AM Jason Lightfoot commented Dec 24 2022 at 10:05 PM

AGV did not drop off items

Hi @Felix Möhlmann ,

At about 8300s, the AGVs will no longer drop off items from the upper levels. Could it be because it is not able to pull the kitchen return CPs? I tried to check the "Leave Entries on List" option in the "Pull LoadCP" activity but it returns with an error of a deadlock situation.

Would appreciate your guidance on this. Thank you very much!

Software Version:

FlexSim 22.2.3

agv control points

liftusage2-221213.fsm (2.0 MiB)

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Answer 1 · 2022-12-14T11:55:25Z

Felix Möhlmann answered Dec 14 2022 at 11:55 AM Jason Lightfoot commented Dec 24 2022 at 10:05 PM

- Only three of the six control points are actually connected to the queue.

- The AGVs cannot turn onto the dropoff spur when coming from the right (Triggerpoint2). This means they have to travel al the way to the next corner of the path to turn onto the upper path and approach from the left. So they pull control points much too early.

- Triggerpoint1 (top left) could maybe be placed closer to the next intersection.

All of those points contribute to the available points all being acquired by AGV too far back in line at some point.

1671018772825.png (47.6 KiB)

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Glenson G commented · Dec 23 2022 at 8:43 AM

liftusage2-221223.fsm
The attached model is saved in 2023 version.

Hi @Felix Möhlmann ,

After I made the amendments, it could not pick up from the multiple pick up points at Kitchen Return, may I ask what was the mistake that I made and how can I rectify it?

Thank you!

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liftusage2-221223.fsm (2.0 MiB)

Jason Lightfoot ♦♦ Glenson G commented · Dec 24 2022 at 10:05 PM

You should pull the location with the added query "WHERE isAvailable" otherwise all AGVs try to allocate the same controlPoint.

This may still not give you the desired outcome since isAvailable is just reporting the flexSim built-in command cpisAvailable - which may not be reflecting the availability in the way you need. If that's the case, take control of your model and manage the availability yourself.

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