topic Re: How to remove all items in the queue if downstream processor is breakdown in FlexSim Forum

How to remove all items in the queue if downstream processor is breakdown

vivian_f — Fri, 13 Oct 2017 17:02:40 GMT

[ FlexSim 17.2.1 ]

I need to build a model that items in the queue should be sent to ports based on downstream processor's status. If processor is in running status, then items in the queue will be waiting to be processed. If processor is Breakdown, then all items that are currently in the queue should be removed to a sink node.

I think I should use conditional port for the out flow of the queue, but it doesn't work as I expected.

I am new to the software, can anyone please help? Thanks.

Re: How to remove all items in the queue if downstream processor is breakdown

joerg_vogel_HsH — Fri, 13 Oct 2017 18:11:29 GMT

Place a queue behind your current you as a bypass. Then you close the input of this bypass queue. If the breakdown occurs you simply opens the input of the bypass and the items will take this route by default if you haven't explicitly set output ports in your queue.

Re: How to remove all items in the queue if downstream processor is breakdown

vivian_f — Fri, 13 Oct 2017 18:47:21 GMT

Thanks, Jörg! Is it possible to use only one queue for to realize it?

Re: How to remove all items in the queue if downstream processor is breakdown

mischa_spelt — Mon, 16 Oct 2017 10:01:42 GMT

Hi Vivian. Instead of using a bypass queue, you can also connect a sink to your existing queue. In order to clarify Jörg's answer, I have attached breakdownsink.fsm in which the BreakdownSink closes its own input in its On Reset trigger. There is an MTBF/MTTR event that affects the processor, in which I have implemented an On Break Down and On Repair trigger to respectively open and close the inputs of the breakdown sink.

Re: How to remove all items in the queue if downstream processor is breakdown

vivian_f — Tue, 17 Oct 2017 13:20:33 GMT

Hi Mischa, This is exactly what I want to do, thank you very much!