How do I resume item on message trigger?

[jonathan_s3]

[ FlexSim 20.2.3 ]

Using either a decision point or a conveyor station, how do I resume item on message trigger without process flow?

[jason_lightfootVL7B4 · Accepted solution]

I might pass in the item to resume as the sending object. The question then is which object is receiving the message, and from where is it sent?

[jason_lightfootVL7B4]

Here's an example using the DP arrival (to stop and send a delayed message) and DP messagetrigger to resume.

DPstopMessageResume.fsm

[jonathan_s3]

In your example the decision point is sending the message to itself. So

conveyor.itemData[fromObject].resume();

resolves correctly. But if another object is sending the message then it does not. I get:

time: 4.958494 exception: FlexScript exception: MODEL:/Pos1>variables/Custom/onMessage

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In another thread the reply used some kind of label on the object to point to the flow item. But I can't figure out how to do that. Here's that thread:

https://answers.flexsim.com/questions/40783/code-to-resume-conveyor.html

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Why aren't there more pick list options for on message triggers? It seems like it would be incredibly useful.

[jason_lightfootVL7B4]

Here's an example where the top conveyor's DP sends a message to the lower DP (centerObjects reference).

The lower DP ignores it if it doesn't have an item - which I set as a label on arrival and clear on message.remoteDPmessageResume.fsm

[jonathan_s3]

I think I figured it out. On arrival I have a code snippet:

current.OtherItem = item

Where "OtherItem" is a pointer label I created on my station.

Then on message can resume the item using that pointer label to the item.

I created the resume code first as an on Arrival trigger then copy/paste the code from there to the on message trigger code.

---

Object fromObject = param(1);

double msgparam1 = param(2);

double msgparam2 = param(3);

double msgparam3 = param(4);

Conveyor.DecisionPoint current = param(9);

Conveyor conveyor = param(10);

{ //************* PickOption Start *************\\

/***popup:Conveyor_StopResumeItem*/

/***tag:description*//**Resume Item*/

if (/**\nCondition: *//***tag:condition*//**/true/**/) {

Object involved = /** \nItem: *//***tag:item*//**/current.OtherItem/**/;

involved.up.as(Conveyor).itemData[involved].resume();

}

} //******* PickOption End *******\\

---

This forces a resume item pick option in the on message trigger to show up.

With this method I really only wrote one line of code by hand. It was just figuring out where all the pieces needed to go after that. Seems to work so far.

[jason_lightfootVL7B4]

Is this all related the that 4 station workcenter with the trays that return underneath or is it something new?

[jonathan_s3]

Yes and no. It was something that was frustrating me so I had to figure it out. I will use it for that model.

I can't for the life of me understand or replicate the process flow you wrote that worked for that model.

[jason_lightfootVL7B4]

We can do a zoom meeting if you want to go through it and I can explain everything.

[jonathan_s3]

Next week sometime sure.