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Forum » Process Simulator » English » Communication questions
Communication questions
brittacwDate: Monday, 26.10.2015, 18:51 | Message # 1
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Hi Alexander, thanks a lot for your hard work on this program smile

I am new to Process Simulator, and I was wondering if it would work in my situation. I need to pass data from an OPC-DA server, which I saw is an available connection in the program. Then the simulation output must be passed to an OPC-DA client (perhaps using Modbus) which is a Siemens PLC.

Let me know if this description needs to be more specific, I have not tried implementing it with Process Simulator. Just asking if you think this would be a good use for the program.

And thanks again!
 
AlexorDate: Monday, 26.10.2015, 21:55 | Message # 2
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Welcome :)

I think PS is suitable for your task.  Also, you may use S7IsoTCP connection to write simulation output directly to Siemens PLC S7-300/400 (S7-1200/1500 with limitations).

Try it, and if you will have any questions do not hesitate to ask.
 
brittacwDate: Wednesday, 04.11.2015, 13:01 | Message # 3
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Hi Alexor, thanks for the reply.

I have had some time to work on the project. I have success in connecting a model in Mechatronics Concept Designer (MCD) with PS. However I am having trouble with the PS - PLC connection. PS is able to "see" the PLC in Connections, using the IP address of the PLC (I am using an Ethernet cable). However the connection quickly breaks due to errors if I create an Item.

Connection ´Connection 1´error. MD0.0 DWORD CLI : function refused by CPU (Unknown error)

I am very new to this topic, so I do not know how to configure the PLC connection. I have tried different data types, etc.

The goal is for example, an initial test where the position of a cube in MCD is controlled by a simple program on the PLC, such as a counter. The PLC is of the S7300/400 type.

Thanks again smile
 
AlexorDate: Wednesday, 04.11.2015, 17:53 | Message # 4
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Hi,

What Rack/Slot number do you use for connection? If PLC is S7-300, need to use 0/2.
 
brittacwDate: Wednesday, 04.11.2015, 19:27 | Message # 5
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Hi Alexor,
I was using 0/0 and 0/1, thanks for the tip. The connection is now holding! I willl keep working on it further now.

Added (04.11.2015, 19:27)
---------------------------------------------
By the way, I have one more problem

I am trying to install PS on a second Windows PC, but I receive the error:

"There is a problem with this Windows Installer package. A program required to install to complete could not be run. Contact your support personnel or package vendor."

Any suggestions? Thanks again smile

 
AlexorDate: Thursday, 05.11.2015, 17:59 | Message # 6
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Need Administrator rights to install program. Also try to disable UAC.
 
brittacwDate: Monday, 09.11.2015, 10:47 | Message # 7
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Hi Alexor,

I can now report success! For reference if anyone is interested, I used PS with the S7IsoTCP (rack/slot 0/2) to connect to the Microbox, and the connection appears in the TIA Portal program. Then with MCD I used the OPC connection to detect the values in PS. In summary:

MCD - (OPC) - PS - (S7IsoTCP via Ethernet) - TIA Portal / Microbox

MCD & PS on one PC..................................TIA Portal on a second PC

Thanks for the helpful support!
 
gstruwigDate: Monday, 18.07.2016, 21:50 | Message # 8
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Hi Alex,

I am trying Process Simulator for the first time today. Thank you for useful software.

I am using MQTT protocol and can send message successfully to the broker.

I am wanting to send boolean string '0' or '1' from a Sensor.discrete but message sent is 'True' or 'False'. I tried changing signalisation to 0 and 1 but this makes no difference.

How can I do this?

Thanks
 
AlexorDate: Tuesday, 19.07.2016, 08:36 | Message # 9
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Hi,

Signalization in Sensor.Discrete is just text messages to log/tell when the value was changed.

I think the simplest way for you is to use RadioButton without Sensor.Discrete. Just create MQTT Item and in “Add Panel” window choose “Communication” tab. In RadioButton setup, you can add two values, for example, “ON” – 1 and “OFF” – 0.

 
gstruwigDate: Tuesday, 19.07.2016, 15:06 | Message # 10
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Thank you Alex, that works for me.

I am now having a similar problem sending analog value. I need to send Integer but Sensor.analog sends decimal.

It would be good if MQTT protocol not default to string but let you choose data type then then use Convert toString to send Topic. This way string could be formatted.

Maybe this is a topic for Enhancements.

Thanks
 
AlexorDate: Wednesday, 20.07.2016, 09:10 | Message # 11
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I will think about your idea.

If you are not afraid of a little programming work, you can use Script.CSharp for any conversion you want. For intermediate
data storing use Items of Internal connection.

For example:
Internal.A is double type value (Sensor.Analog).
MQTT.A string value you want to publish.
C# code for Script.CSharp: 'MQTT.A' = Convert.ToInt32((double)'Internal.A').ToString();

Decrease Trigger Time in Script.CSharp options to speed up conversion. Default value is 500 ms.

Tip for Boolean:
if((bool)'Internal.B')
{
    'MQTT.B' = "1";
}
else
{
    'MQTT.B' = "0";
}
 
gstruwigDate: Wednesday, 20.07.2016, 16:02 | Message # 12
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Thanks Alex,

I already figured out to use the Internal connection for boolean conversion :)

I will do the same with Analog. Thank you for your help and a brilliant program.
 
thalespmendesDate: Wednesday, 15.03.2017, 16:05 | Message # 13
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Hi Alexor,

I would like to know which type of communication server (OPC-UA server or OPC-DA server) the process simulator creates when establishing a S7_PLCSIM connection? 

Thanks
 
AlexorDate: Thursday, 16.03.2017, 08:46 | Message # 14
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Hi,

Process Simulator use COM object S7ProSim for connection to Siemens S7-PLCSim.
https://alexsentcha.wordpress.com/using-s....-plcsim

PS always creates OPC-DA server for all Items, not only S7PLCSim.
 
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