Hello, in the simulation linked below, i want to extend the process flow logic for the queue 3 and queue 4, but setting the queue 1 and queue 2 output to push to list, don't make the processed flowitems back in the rack. Any one have tips for fix the problem?
https://www.dropbox.com/s/sjvt7masbu8p1x0/spaggiari.fsm?dl=0
As i've been looking at your model I have run into some problems regarding the transports you are using on queue 1 and 2, as well as the send to ports, both have references that currently don't exits. I am also unsure how you want the items to flow through the system. Could you share how the items are supposed to move through the system as well as what transports are being used to move items from the queues to the processors?
I modified the model a bit fixing the missing references, i just want the the flow item not processed exit from the rack in the queue 1, the queue con only have one not worked item (Lavorato = 0) and one worked item (Lavorato = 1) at the time. The the flowitem pass to queue 3, the logic of the item contained in the queue is the same as before. Then the item will be trasported to the processor, after the lavoration the item will change shame and the label "Lavorato" will be equal to 1. Now it will back on the queue 3 (the same where he left before), in there will pass again in queue 1 and will be trasposted by the asrs vehicle into the rack again. The queue 2 and 4 have the same logic. Now the item will never the rack again. I can't modify the layout and the number of the queue of the exit bays of the. I will add a wait time for flow item moving through the queue 1 and queue 3 and teh way back too.
Here is a model that only allows two items in each queue. It mostly uses process flow. To limit the items in each queue I used resources that represent the available slots in each of the queues. The resources are pulled according to the queue that they were last in. If you want you can change the number of operators by changing the value in the parameters table.
You can access the file by right clicking the file and clicking save as and then selecting all files and making sure that the file extension is .fsm. spaggiari (2)_JW.fsm.jpg
Let me know if you have any questions about the model.
Thanks @Jacob W2, the item transfer from queue 1 and queue 2 to queue 3 and 4, don't need an operator, and the queue 1 can only trasfer item to queue 3, so the queue 2 will only trasfer item to queue 4, the output to the rack don0t have limitations. Actually i'm still using the trial version of the software and i think all dat processflow item will excede my limit since i'm already using a process flow for another part of the model, The one i shared is a sample of the problem i needed to fix
I think you only need to change two things in your model for it work:
1) Queue1/2 should also use a pull strategy with the requirement set to only pull processed items (lavorato == 1). Since otherwise Queue3/4 are just sending the unprocessed items back to the starting queues.
2) Queue3/4 are the ones that are receiving the items from the processors. So the tokens in the lower part of the process flow should refer to them in their "Queue" label instead of Queue1/2. You can reference them from starting from Queue1/2 through the port connection.
Thank @Felix Möhlmann, i made this changes but the queue 1 and 2 are empty while items must left the queue 3 and 4.
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