Communication is not established with MODBUS simulator

[Praveen]

Hi,

I am trying to connect MODBUS PLC simulator (TCP) with Rapid SCADA.

Communication log always says “Connection is not established”.

I am using simulator from the link http://www.plcsimulator.org/Home

And I am running RapidSCADA and Simulator in same machine.

And I also could see in the log that connection is reused at 127.0.0.1, 10000 port.

Can you help me in solving this issue?

With B/R,
Praveen.B

[Mikhail]

Hi,

Mudbus TCP usually uses 502 port. Try setting up the communication channel. Use TCP client channel type.

[Praveen]

Hi Mikhail,

I am using TCP client and using 502 port only.

And if I connect to slave simulator with “ADAM-6015 Server room”, I am able to read the data. If I configure new Modbus client, I am not able to get the data.

Can you help me in trouble shooting it?

With B/R,
Praveen.B

[Mikhail]

Do the both communications the old and the new work in parallel?
Post a piece of communication log, please.

[Praveen]

Hi,

Please find modbus communication log for the one which I am not able to connect.

2016-06-24 08:52:07 Unable to communicate with the device because connection is not established

2016-06-24 08:52:37 Unable to communicate with the device because connection is not established

———————————————————————————-
Same slave I could connect from server room. Communication log is:

Request element group “Max. Temperature”
Send (12): 00 00 00 00 00 06 00 03 00 0A 00 07
Receive (7/7): 00 00 00 00 00 11 00
Receive (16/16): 03 0E 0C 76 0C 76 0C 76 0C 76 0C 76 0C 76 0C 76

——————————————————————————–

I have one more question.

How to change the Modbus TCP default port? Suppose I want to run 2 slave simulators from same machine and different ports.

With B/R,
Praveen.B

[Mikhail]

Probably the Simulator doesn’t support more than 1 connection.
You can set another TCP port followed by IP address: 127.0.0.1:503

[Praveen]

Yes. In that case RapidScada also should listen at port 503 right?

Can you help me in changing TCP port to 503 in client?

(if I select Modbus TCP, by default RapidSCADA takes 502 port and not editable)

Thank you.

With B/R,
Praveen.B

[Mikhail]

Post screenshots for such questions, please.

[Praveen]

Hi, sorry for the inconvenience..

Not able to keep the image, editor is accepting only the text.
where can I keep the screenshot?

In communicator, I imported communication line and selected modbus communicator
type as modbus TCP.

then, Port is selected by default as 502, and not allowing to change to any other port.

[Mikhail]

Use postimage.org and post links.

[Praveen]

Hi,
Thank you for the answer.

And the issue is solved.I could connect to 2 modbus simulators on different ports.

With B/R,
Praveen.B

[Mikhail]

OK 🙂

[Author]

Posts