How to set conveyors preference and use buffer?

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Lukas Buchta asked Aug 12, '21 Kavika F commented Mar 9, '23

How to set conveyors preference and use buffer?

Dear Experts!

So I struggle with making A) restrictied zone logic and B) move from buffer to postion (1,2,3 or 4)

A) On the last part of my conveyor I have yellow operators 1,2,3,4 + buffer. The item always go to one of this workstations (visual control of the product). The item on the main conveyor block these yellow operators to send or recieve new item, so i want to make a logic with some restricted are - ,,if postions 1,2,3,4 and buffer are full, Then no item can enter this area".

B) The logic is: processed item fill position 1, then 2, then 3, then 4, then buffer. When some of positions (1;4) becomes empty, then item move from buffer to the new empty position (1;4)

I have only one process flow named ,,workstation" and i tried to use one logic with decision points, but failed.

Thank you very much for your help, or hints how to do it!

zalohayama_autosave.fsm

Software Version:

FlexSim 21.2.0

conveyor flexsim 21.2.0 itemtype restricted area

explain.jpg (101.0 KiB)

zalohayama-autosave.fsm (9.6 MiB)

Answer 1 · 2021-08-13T06:50:32Z

Patryk answered Aug 13, '21 Kavika F commented Mar 9, '23

The best way to do it is using List. I created two logics first for A and B. To choose the logic A in global table "Logic" set 1 or 2 to choose the logic B.

I create new label on station "Type" to differentiate buffer from station

The process flow for both logic is similar. First stop pallet the pull form list Visual station then resume pallet and send to station. At the station on trigger "On contunue" push station to list.

In attached I send the model.

zalohayama_autosave.fsm

1628836913849.png (29.4 KiB)

1628837274242.png (25.3 KiB)

1628837104238.png (87.4 KiB)

1628837197554.png (48.7 KiB)

zalohayama-autosave.fsm (9.2 MiB)

· 9

Lukas Buchta commented · Aug 13, 2021 at 01:42 PM

@Patryk thank you, thats a good hint. Just it is missing the ,,Logic" table. I can see just this and therefore the buffer and logic doesen't work i guess.

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logic.jpg (23.5 KiB)

Patryk Lukas Buchta commented · Aug 15, 2021 at 07:31 PM

The problem was probably because they were entered on the list as soon as they left the station, not the area, and "Station20" formed a queue. Now free stations are Push to the list at the decision point "After_Station". In the logic on the label "Station" at tote, the selected station is entered.

zalohayama-autosave (2)_5.fsm

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1629055728858.png (33.0 KiB)

1629055765810.png (128.2 KiB)

zalohayama-autosave-2-5.fsm (9.2 MiB)

Lukas Buchta Patryk commented · Aug 17, 2021 at 12:49 PM

Thank you very much!

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