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Raymond F avatar image
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Raymond F asked Raymond F commented

Pass Station on Conveyor if it is in use

station-pass.fsmI am trying to design a conveyor system that has 3 stations. the model runs clock wise but needs to prioritize the stations ordered against flow starting with station 1 first and fill that area to its capacity then station 2 and finally station 3. When the flow item moves to enter station 1, if it is blocked then i would like it to continue on the main run without stopping and loop back around. Currently I am having issues with getting the decision points to do what I am looking for so I have DP1 set to round robin.

FlexSim 19.2.1
conveyor decision point
station-pass.fsm (49.8 KiB)
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Raymond F avatar image Raymond F commented ·

Just curious if my question got lost in the mix? Its been a few days.

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Raymond F avatar image Raymond F commented ·

@Joseph Gillespie Hi Joseph, Did I do something wrong with this posted question? It hasn't gotten any traction. Maybe you are able to help me out?

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1 Answer

Phil BoBo avatar image
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Phil BoBo answered Raymond F commented

Attached is your model (22657-station-pass-2.fsm) with modifications to do what you describe.

At station 3's decision point, it checks the state of all 3 photoeyes to determine whether to send to station 3. If 1 and 2 are blocked, but 3 is not, then it sends to station 3.

At station 2's decision point, it checks the state of 2 photoeyes to determine whether to send to station 2. If 1 is blocked, but 2 is not, then it sends to station 2.

At station 1's decision point, it checks the state of 1 photoeye to determine whether to send to station 1. If 1 is not blocked, then it sends to station 1.

(I also added an exit conveyor that the stations send to once they have processed the items. You didn't describe how the items leave the system so I just put something simple in. You may need to adjust this logic to fit your situation.)


conveyor-logic.png (216.7 KiB)
22657-station-pass-2.fsm (48.7 KiB)
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Raymond F avatar image Raymond F commented ·

station-pass-2.fsm

Thanks for the help @phil.bobo. I really appreciate it. 1 issue is that boxes are entering stations down stream after they have left a station if the downstream station has capacity. I attached the same file but I removed the color command after the IF statement in the decision points. Is there something that can be added to the decision point to force the box, if already processed to the end of the line? I dont want to double process a box.

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station-pass-2.fsm (48.6 KiB)
Phil BoBo avatar image Phil BoBo ♦♦ Raymond F commented ·

Sure. Add a label that signifies that the item has been processed and don't sent it to the station if that label is set.

22762-station-pass-2.fsm

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22762-station-pass-2.fsm (48.9 KiB)
processed-label.png (735.5 KiB)
Raymond F avatar image Raymond F Phil BoBo ♦♦ commented ·

This worked out awesome. Thanks a lot for the support.

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