problem of TaskExecuter queue in line

HI,
I have a transportation problem, just like the example & pic

I want to take TaskExecuter from a3 to a4, this type of transport is continuous , but I hope that when the items shipped to A4 shut down until the A5 finish.When A4 close, the other TaskExecuter can queue in line.

now,i don't have any idea can solves this problem.Does anyone have an example or can help me?

thanks,wen hsing

For stopping TE until A5 finished I think there are different ways possible.

One is to close edge of NN3 on Arrival and open it as soon as A5 finished.

Another idea would be to use Tasksequences for complete transport. But this would be more effort for the same result.

Originally Posted by Sebastian Hemmann

For stopping TE until A5 finished I think there are different ways possible.

One is to close edge of NN3 on Arrival and open it as soon as A5 finished.

Another idea would be to use Tasksequences for complete transport. But this would be more effort for the same result.

Dear Sebastian Hemmann
Where can I close the edge of NN3 ? Do i need to use code ?

Best idea would be to use a trigger in Networknode. OnArrival: closenodeedge(); I would use.

If you open the Trigger there are this two variables defined:

int toedge = parval(2); //the number of the edge that the traveler is going to next
int fromedge = parval(3); // the number of the edge the traveler came from

At first you should find out what edge your traveler wants to go. This you could log out to outputconsole by using:

pt("Toedge: ");pf(toedge);pr();
pt("Fromedge: ");pf(fromedge);pr();

This way you even will find out, that OnArrival and OnContinue Triggers are fired twice, because TE leaves node to load or unload things (even if you turned on "Do not travel offsets and block space on networks").

Means if you want to go sure your logic should be executed only once allways let it execute when TE passes special edge.

if(toedge == ...

Originally Posted by Wen Hsing Huang

Dear Sebastian Hemmann
Where can I close the edge of NN3 ? Do i need to use code ?

You can try to use ' closenodeedge(obj object, num edgenum)' function within NN3 OnArrival Triggers.

Tom David did something like this here:

http://www.flexsim.com/community/for...?do=file&id=76

NN2 OnContinue shows an Example.

Originally Posted by Sebastian Hemmann

Best idea would be to use a trigger in Networknode. OnArrival: closenodeedge(); I would use.

If you open the Trigger there are this two variables defined:

int toedge = parval(2); //the number of the edge that the traveler is going to next
int fromedge = parval(3); // the number of the edge the traveler came from

At first you should find out what edge your traveler wants to go. This you could log out to outputconsole by using:

pt("Toedge: ");pf(toedge);pr();
pt("Fromedge: ");pf(fromedge);pr();

This way you even will find out, that OnArrival and OnContinue Triggers are fired twice, because TE leaves node to load or unload things (even if you turned on "Do not travel offsets and block space on networks").

Means if you want to go sure your logic should be executed only once allways let it execute when TE passes special edge.

if(toedge == ...

Hey dear:
Sorry! I've tried the above closendge way, and my code is not strong, so I have no way to solve this problem, hope someone can help me solve this problem.
Thanks every one.

Originally Posted by Warren Wu

You can try to use ' closenodeedge(obj object, num edgenum)' function within NN3 OnArrival Triggers.

Hey dear:
thank you,I try "closenodeedge" ,But i don't have ideal to solve my problem.

Ok, I just had a look into your model and found out that,
because you are just using Tasksequences "closenodeedge" doesn´t work the way I hoped.
Using Tasksequences turns off most of standard functions. Seems as if this time even the closed nodeedges and other ports.

Thatswhy you would need another way:
Make a "StopNN" directly in front of your "AimNN".
Send your TE´s to this "StopNN" and create another Tasksequence to the "AimNN" when no other TE is there. At "AimNN" a Tasksequence is created to unload the item when A5 is empty.
Holding some space between the TE`s could even be possible by using Trafficcontrols and some more "Stop NN´s" for all TE´s.

Example of redirecting network travelers:
http://www.flexsim.com/community/for...ead.php?t=2010