The ID number in your poll test is 1, the ID number for the Modbus client in the Logo is 255 ? Change Logo ID to 1 and test it again. You will find the ID numbers at the end of the lines where the HR numbers are mapped to the VW numbers.

Regards, Scorp

Hi Scorp!

Thanks for the quick answer, already try that but didn't work, I have the Ignore Unit ID, selected on the Modbus Slave program, I try what you said but no communication established. Do you think the problem may be the LOGO! ? The message is still on the LCD screen

You are sure to select 192.168.0.4 for connection setup of the server ? I think, this might be 192.168.0.3 (Logo IP address). In the Logo Modbus client select the IP address of your PC, where the server is running.

Maybe you also can try "any address" ?

Regard, Scorp

Scorp,

I tried the three options that you told me,

Very strange, your Modbus server will know its own IP address ? Perhaps your Modbus server has several parameters, which i cannot see from here.

Maybe you can test it with another Modbus server, look to this Link

If have tested this with my Logo and it works. There is no installer, just start the .exe. If "show protocol information" is checked, then sendings and requests must run through the display. On the right side you can select coils, input registers and holding registers. Type in your value and look to your Logo.

See also example picture of my test.

Regards, Scorp

Scorp,

Ok, I am installing the Java Environment to use the one that you send me,

If you can, please try the one that I am using, seen all the parameters, Modbus Server, It use to work before, that is why I am so confused! I have a video of everything working just fine if you want to see it.

I did this, search for an older version of EasyModbus Server (2.4), open it and it didn't make any connection (see attachment) but when I run the Modbus Poll program it make a connection only inside the computer not the LOGO!

I think that the problem is in the LOGO!, it is not making the request, and since it appears always disconnected it doesn't do anything, but how can I verify this? Do I reset it to its factory settings? Can you make an example of the LOGO working as a master so I can run it fresh new please Scorp.

Thank You