modbus communication in PLC k120s

[danw]

There are any number of freeware Modbus Master that Google finds.

The tasks are all the same:

1) Establish a connection, either an IP address for the server/slave or a COM Port for Modbus RTU over RS-485 or RS-232.

2) define a transaction:
which slave number is being addressed?
What Function Code is being used?
What is the starting register/address for the data?
How many register/addresses should be requested?
What format should the data be displayed in?

The attached document has a download link for the ICP DAS Modbus Master Tool and screen shots for
- the connection setup
- the transaction setup
- data display window

It was zipped to make it small enough to be an attachment on this site. It is a .doc format

 

[TL140]

I learned a lot from a udemy course I took.

https://www.udemy.com/mastering-mod...unication/learn/v4/t/lecture/4920098?start=15

Very informative and covers a lot of concepts and great real world examples. Really in depth and the instructor explains the topics quite well.

 

[kurobima]

finally ^_^

I'm finally able to connect the PLC Master-K120s to inverter sv-iC5 ^_^ with this file I downloaded from
http://uyenviet.com.vn/home/Products.aspx?id=16
Thanks for the help everyone, I hope it can help too.