topic Re: agv destination error in FlexSim Forum

agv destination error

farah_najihah_a — Thu, 12 May 2022 09:28:03 GMT

[ FlexSim 22.1.1 ]

FT HBW.fsmwhat is happening here and how do I fix this? I added more decision points, it works fine at first but at a certain point for example at the 600th seconds this error appears. I attach my model together in this.

Thanks in advance!

FT HBW.fsm

Re: agv destination error

moehlmann_fe — Thu, 12 May 2022 10:00:09 GMT

Processor2 is sending an item to the connected conveyor. That entry transfer is not connected to the agv network, so the AGV can't find a path to it.

I doubt Processor2 (or 5 and 6) are supposed to use AGV to send the items to the conveyors? So you should deactivate the "Use Transport" for those.

Re: agv destination error

farah_najihah_a — Thu, 12 May 2022 14:29:45 GMT

@Felix Möhlmann Thank you that works! May I ask you another question? what about this error? and why does my agv does not collect from processor4? did I misconnect anything? and I tried to add another agv but the 2nd agv does not move at all. Correct me if I'm wrong, to add a 2nd agv, after adding a new task executor, I will need to connect the taskexecutor to the dispatcher and the first decision point only right? is there any other step to it?

Re: agv destination error

moehlmann_fe — Thu, 12 May 2022 15:29:07 GMT

From the looks of those message, an object that does not have a 'Location' connection to a control is pushing an item to the AGV work list.

Since you are using the AGV process flow you don't actually need a dispatcher. Connecting the task executer to a control point should be all that's necessary. You might want to check if the AGV is blocked by the first one.

Hope this helps. If the problem persists it would be good if you could upload your current model state again. It's difficult to help based on a short description only.

Re: agv destination error

farah_najihah_a — Thu, 12 May 2022 17:13:10 GMT

model agv error.fsm

Thank you for your patience explaining it to me. I have taken out the dispatcher and connect to the agv directly. I am sorry as I couldnt really execute well. I attached my model for your reference, if you could help where am I missing 😞

Re: agv destination error

moehlmann_fe — Thu, 12 May 2022 17:45:18 GMT

model-agv-error-fm.fsmAll objects that either send or receive items through the agv network need to be connected to a control point as a 'location' (blue line - hold down 'A' and click on the object and control point in any order)

You have some of the 'Send to Port' options set to push the items to a list. This is generally done when the flow is managed through lists instead of port connections. (A different object would pull the item from the list, so the destination is known). I think in your case you should leave them as 'First available' since you are utilizing single port connections.

The items should be pushed to the agv work list in the 'Use Transport' option.

In general:
Send to Port - where does the item go?
Use Transport - who transports it?

I adjusted the logic in your model accordingly and added some control points as well as connections to objects that were missing them. Lastly, I also adjusted the NextWorkPoint-Loop to include the new control points.