3 conditional output ports

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Robert F2 asked Oct 12, '20 tannerp answered Oct 12, '20

3 conditional output ports

Hi everyone,

I am having trouble making the logic for sending an item to a port based on 3 different conditions.

Condition (1) - Send item to Queue1 as long as Queue1 is empty.

Condition (2) - Send item to Queue2 if Queue1 is not empty.

Condition (3) - Send every 10th item to Queue3.

The send to port strategy I am using is a Conditional Port with added custom logic, but clearly I am not doing this correctly. Can anyone offer tips on how to create this logic?

Software Version:

FlexSim 20.0.0

flexsim 20.0.0 conditional port multiple ports

flexanswers.png (339.3 KiB)

Answer 1 · 2020-10-12T15:48:32Z

tannerp answered Oct 12, '20 tannerp edited Oct 12, '20

@Robert F2,

The way I understand your logic, I think Condition 3 should take precedence over other two conditions. Right now, however, it is only evaluating for Condition 3 if the other condition is not met. I would re-write the logic like this:

if(Math.fmod(current.stats.output.value, 10) == 0) //If condition 3 is met, Queue3
     return 3;
else if(current.outObjects[1].subnodes.length != 0) //If Queue1 is not empty, Queue2
     return 2;

return 1; //Else Queue1

This means that it first checks to see if the item is the 10th item. If so, it will send it to Queue3. If not, it will evaluate whether Queue1 is empty. If Queue1 is empty, it will send to Queue1. Otherwise, it will send to Queue2.

In summary, it's important that Condition 3 is evaluated first. Then conditions 1 and 2 can be evaluated in whatever order makes the most sense to you.

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