Operator doesn't follow code

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question

Daniel C asked May 15, '18 Emily Hardy commented May 24, '18

Operator doesn't follow code

I have this rack with queues. Any item can go in any queue but once it enter only items from the same type can enter (see color). the it leaves and any item can enter. his codes works just fine but when i use the 'Use Transport' option the operator doesn't respect the code and puts the item anywhere. See images below.

Any idea?

Software Version:

FlexSim 18.1.1

queue operator code

with-operator.gif (742.6 KiB)

no-operator.gif (372.2 KiB)

· 3

Jeff Nordgren commented · May 15, 2018 at 08:42 PM

@Daniel C,

I have a good idea what might be happening. If you are using manual code to control the Operator, what I'm thinking is that you are not taking into consideration the time it takes the Operator to travel to the loading and unloading stations or checking to make sure the downstream object is even able to accept new flowitems. It's hard to be specific and I don't know if that is the problem without a model to look at. Can you send in your model or a sample model of the problem area so that we can see exactly what the model is doing?

Thanks.

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Daniel C Jeff Nordgren commented · May 17, 2018 at 01:06 PM

I'm not using code to control the Operator, I'm using it to control the queue's flow. The Operator only transports the items.

Here is a smaller model about this.

test-racks.fsm

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test-racks.fsm (800.8 KiB)

Joshua S commented · May 15, 2018 at 08:34 PM

Can you upload your file so we can take a look at your logic?

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Answer 1 · 2018-05-17T17:26:39Z

Joshua S answered May 17, '18 Emily Hardy commented May 24, '18

The reason this was happening was a timing issue. When the operator was not in use, it could dump every item created at the 2 main queues instantaneously to the racked queues, which would then fire each of those queues "on entry" events, changing their "tipo_actual" labels to the first item entered "Tipo" label.

With an operator in use, the racked queues receive a list of objects that will be sent to them before their "on entry" event is activated. I added a line of code to each of the racked queues "pulled requirement" code which then takes the first item it pulls then changes the "tipo_actual" label to that items "Tipo" label.

this is the line I added:

setlabel(current,"tipo_actual",Tipo);

See if this model is what you are going for 11913-test-racks-fix.fsm

I also connected both main queues to the bottom racked queue, it wouldn't fill without doing so, don't know if that is something you wanted to do as well.

Hope this helps.

11913-test-racks-fix.fsm (801.0 KiB)

· 1

Emily Hardy ♦ commented · May 24, 2018 at 02:55 PM

@Daniel C, did this help you resolve the problem?

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