Hi,
I am trying to define this elevator as a double pallet elevator. I've been trying to do this with the object process flow but I couldn't make it work. The main idea is that the elevator will only go down once it has two pallets.
Thanks!
doubleelevator.fsm
This becomes really simple if you use lists and push the items when they arrive at the exit transfer and model the elevator's behaviour as a single cycle rather than a process for each item.
Getting the elevator to travel to any transfer seems tricky - I added a user command for getting a transfer's location.
Model attached.
Thank you @Jason Lightfoot, that was helpful. I managed to edit your logic and do it with three pallets. Unfortunately, I was not able to edit my model properly.
In your model, this script provides a 3D array with the x, y and z position of the ExitTransfer position. 
However, when I try to replicate this in my model, I get the following error.
I’m not sure what this is for. I’m aware that you use this in the source to determine the pickup and dropoff locations (getEntryExitTransferLocation(current.pickupTransfer)). Was it to check something?
To solve this problem, I’ve set my coordinates (both in source and travel). [Again, I’m not sure where this information is used]
However, it seems that apart from this there is something else that I’m not doing correctly because it doesn’t go over this state.
Can you help me with this? I provide my model.
Many thanks!
Myriam
I added the usercommand to your model and made the List in the process flow point to the Global List in the toolbox: "ElevatorItems".
Just one more curiosity, pallets come to the elevator in a fast move while they go out smoothly. Why is this so?
A process flow logic must check, if there are two pallets available for loading. You would do it by looking for items on a conveyor or by a photo eye counting items. Then you wait for any identified item and load it onto the elevator. After this you let travel the elevator to your destination and you unload each item on him to an entry transfer by a sub flow structure.
Yes, I realised because I changed some station times and it is not working. Is there any way that I could do it with a process flow? (In order to avoid failing if there is any other change).
Thanks!
You can replace any internal created tasksequence by a process flow created tasksequence.
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