Emulation pproblem Modbus TCP

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Magdalena B3 asked Apr 16, '20 Matt Long commented Jun 30, '20

Emulation pproblem Modbus TCP

Hello everyone, I have a problem with Emulation in Flexsim. I would like to create a Modbus TCP connection as a server not a client. While I create sensors variables the client could read the data. But when I try to make a control variables, client could send some data to server and it can read them, but I can’t see them in Flexim model, I couldn’t write them for example to Table.
Do you have any ideas how or where could I find the sending data in Flexsim model ?

Software Version:

FlexSim 19.0.2

modbus communication flexsim 19.0.2

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Matt Long commented · Apr 30, 2020 at 11:42 PM

@Magdalena B3 What client software are you using? Do you have a sample model to share?

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Magdalena B3 Matt Long commented · May 05, 2020 at 09:45 AM

I attached the sample model.

I’m using EasyModbus Tools as Client.

Now when I try to connect by localhost there is no connection. And there is the same situation when I try to connect with other computer( Emulated server has my computer’s IP ) the connection was created, I could send some date to server and read them using client, but I can’t see them in Flexim model - the date didn’t appear in simulation.

ex_modbus.fsm

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Matt Long Magdalena B3 commented · May 05, 2020 at 03:26 PM

Answers is having some issues with attachments. Can you try uploading that model again?

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Answer 1 · 2020-05-19T16:37:20Z

Matt Long answered May 19, '20 Matt Long commented Jun 30, '20

@Magdalena B3 this has been fixed in FlexSim 20.0.6 and 20.1.2. You can download these latest versions through the FlexSim website.

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Magdalena B3 commented · May 21, 2020 at 05:44 AM

Thanks, I've downloaded and it works :)

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Magdalena B3 commented · Jun 30, 2020 at 03:12 PM

Unfortunately, I still have a problem with Modbus TCP Emulation when Flexism is a server. When the client sends some data to server (to Flexsim) sometimes I could write date to table as a newValue, but sometimes I couldn’t. Does anyone have an idea what is wrong?

Also, I could not find anywhere in simulation raw data from Modbus Registers.

If there is no access to raw data of Server Registers (for example in form of table), I think such functionality would be very useful, in case writing data to that table directly by ProcessFlow, without creating Variables in Emulation.

I work on Flexsim v.20.1.3.

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Matt Long Magdalena B3 commented · Jun 30, 2020 at 03:18 PM

I'll look into that. I'm not sure why it would sometimes not work.

As for the raw data, there isn't currently a table to see that, but it is on our dev list and has been partially implemented but not completed.

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