emulation mode: encoder sensor?

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Craig DIckson asked Aug 27, '19 Braydn T commented Sep 24, '19

emulation mode: encoder sensor?

I am building an emulation for our PLC programmers to use. One of the sensors they use is an encoder that measures distance travelled on a conveyor. The encoder changes a bit every 2" travelled. I don't think just time is an adequate proxy, since the conveyor has a VFD and changes speed fairly often (with accel and decel of course).

Any suggestions?

Software Version:

FlexSim 19.1.1

emulation module encoder

Answer 1 · 2019-09-09T21:08:43Z

Benjamin W2 answered Sep 9, '19 Braydn T commented Sep 24, '19

Hi @Craig DIckson,

If I understand you correctly, you are trying to use FlexSim's emulation module to model how far a flow item has traveled on the conveyor. However, since your conveyor is on a VFD, you cant use normal kinematics to model the flow item.

Have you considered dynamically changing the conveyor speed based on your servers instead of using the distance sensor? Then you could use something like:

Model.find("Conveyor1").as(Conveyor).targetSpeed = ConveyorSpeed

Where "ConveyorSpeed" is a global variable updated by your servers.

If you still want to use the distance sensor, you might want to consider using something other than the conveyor module, since the conveyor module is heavily based in acceleration, speed, and deceleration.

· 2

Joerg Vogel commented · Sep 10, 2019 at 08:15 AM

here is an example

conveyor-sensor-distance.fsm

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conveyor-sensor-distance.fsm (33.4 KiB)

conveyor-sensor-acc-dec.gif (2.1 MiB)

Braydn T commented · Sep 24, 2019 at 03:30 PM

@Craig DIckson

Did Ben's Answer help you? If so, could you please click the accept button? Thanks!

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