stop/resume item on message

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question

Mia asked Nov 27 2023 at 11:47 AM Jason Lightfoot commented Nov 28 2023 at 11:52 AM

stop/resume item on message

微信图片-20231127194711.png stop_resume_item_onmessage.fsm 2.fsmI tried to stop a item on arrival by processflow, but when I tried to resume , it failed to.

There are two methods I used:

first model I used wait-event until DP1 receive message , it not work

second model I used custom coder such as

if (objectexists(current.stoppedItem)) {

conveyor.itemData[current.stoppedItem].resume();

current.stoppedItem=NULL;

},it still not work.

Can you help me find why my model not work?

Software Version:

FlexSim 22.0.16

item stop and resume onmessage

微信图片-20231127194711.png (50.1 KiB)

stop-resume-item-onmessage.fsm (44.5 KiB)

2.fsm (43.1 KiB)

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Answer 1 · 2023-11-27T16:45:49Z

Jason Lightfoot answered Nov 27 2023 at 4:45 PM Jason Lightfoot commented Nov 28 2023 at 11:52 AM

You're reassigning item with a value that is not the item from your user event. Remove the item reference from your WaitForEvent and it will work.

(The user event is currently sending itself as the sending object, which you're then assigning to the token's item label).

For synchronization it might be better to use the push/pull mechanism of lists rather than messages which can result in extensive case statements within a single on message code and is not as state/memory aware.

· 2

Answer 2 · 2023-11-28T01:32:42Z

Mia answered Nov 28 2023 at 1:32 AM

new.fsmI modified the wait-event，this is the new model that works.

new.fsm (45.7 KiB)

Answer 3 · 2023-11-27T16:38:35Z

Joerg Vogel answered Nov 27 2023 at 4:38 PM Mia commented Nov 28 2023 at 1:18 AM

A photoeye sends delayed messages to stop and resume items on involved conveyor On Message trigger.

stop_resume_conveyoritem_by_message_of_PE.fsm

stop-resume-conveyoritem-by-message-of-pe.fsm (38.2 KiB)

· 1

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