How to wait for an event: Processor is available

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Claudia P3 asked Aug 22 2021 at 12:43 AM Claudia P3 commented Aug 23 2021 at 7:27 PM

How to wait for an event: Processor is available

Hi, I have a flow of material that need to be batched and wait until the processor is available before aquire the resource. When the processor will be available the resource is going to take the item flow and take it to the processor. But I can't do that with "wait for an event" because I don't find that option.

SimulacionPF.fsm

Software Version:

FlexSim 21.2.0

processflow processor wait for event flexsim 21.2.0 first available

simulacionpf.fsm (75.4 KiB)

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Answer 1 · 2021-08-23T07:09:52Z

Felix Möhlmann answered Aug 23 2021 at 7:09 AM Claudia P3 commented Aug 23 2021 at 7:27 PM

It would probably work best, if you added the processor(s) as a resource to the process flow as well and simply acquire it before the operator. Then release it again by listening for the "ProcessFinish" event in a wait for event activity.
Make sure to assign them to a different label on the token than the operators so you can properly release them.

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Claudia P3 commented · Aug 23 2021 at 2:32 PM

Thanks! that was really helpful. But I have another question, I created the processors (8 of them) as resoucers in the same group. But I have some products that can not be produced in some of them (processor 2 and 3), Is there a way to acquire the other resource than 2 and 3 if I create them with arrays?

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captura-de-pantalla-2021-08-23-103636.png (586.7 KiB)

Felix Möhlmann Claudia P3 commented · Aug 23 2021 at 3:11 PM

You could use an array of values and reference the processor through the group index

Group("<GroupName>")[index]

but keeping the reference of the resource as the group itself is probably easier in the long run.

If there are only a few distinct cases of which processors are valid, you could send the tokens to different acquire activities based on their type. If you then give each processor a label with a unique value (for example just create a label "Num" and number them from 1 to 8) you can exclude certain processors by adding a query to the activity.

All acquire activities would link to the same resource.

In the example, the processors with Num = 2 and Num = 3 would not be a option.

Alternatively, if you have numerous different types, all requiring a different subset of the processors you could do the following:

Each processor gets an array label "ValidTypes" (arbitrary name) , that holds information about which types the processor can work on. For example [1, 0, 0, 1] would mean the processor can work on type 1 and type 4. (If your types are text values, you can map them to a numberwith the "Values By Case" option of the "Assign Labels" activity.) Assuming the type of items is stored in token.type, you would then use the query from the following screenshot.

Then, only a processor with the array value of the corresponding type set to 1 can be acquired. ("puller" is a reference to the token in the query)

AcquireByArray.fsm

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1629730406088.png (11.1 KiB)

1629731241438.png (11.2 KiB)

acquirebyarray.fsm (31.5 KiB)

Claudia P3 Felix Möhlmann commented · Aug 23 2021 at 7:27 PM

Thanks Felix! I could do it with your answer..

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