Hi everyone

Actually i am working in a project which communicate with 6 different 3rd party via modbus TCP. I have modbus register list for everyone. I did not make this communication before. The system is S7-400 redundant as attached. https://showbox.bio/ https://tutuapp.uno/ https://vidmate.cool/

Can anyone help me.

Thanks

Hello Azmir;

The S7-400 CPUs do not have integrated Modbus TCP functions.

You must purchase them as an optional library.

https://support.industry.siemens.com/cs/hk/en/view/22660304

The type of redundant Modbus TCP library (for a S7-400H system) you can download depends on whether you use a CP 443-1 or the integrated Profinet port of the CPU:

• Modbus/TCP PN CPU Redundant
  (Article number: 6AV6676-6MB10-0AX0)
  Download:103475102
  
• Modbus/TCP CP Redundant
  (Article number: 6AV6676-6MB30-3AX0)
  Download:109739221

The downloads are free, and the downloaded functions are fully functional, so you can test them completely before final installation. However, without a valid license, the SF LED of the CPU will be active (this makes clients really nervous on site) and the diagnostic buffer of the CPUs will fill up with error messages linked to this license not being found.

Hope this helps,

Daniel Chartier 

Hi Dear

This is my question but the admin move to here under comm/ networks.  Actually i have CP-443 in the hardware configuration

Hello Muhammed;

Are you a different member than AzmirAhmmmed?

Are you asking a different question? The answer to your situation (you are using CP 443-1 in a redundant S7-400H system, correct?) is already in the earlier post: you would need the Modbuis/TCP CP redundant driver and functions.

Hope this helps,

Daniel Chartier

Hi dear

Thanks for support

I am a different memeber. may be he copied my post. Yes in my system the CP 443-1 in a redundant S7-400H system ( each CPU has an independant CP443-1). 

Now sir could you tell me the blocks of send and receive of modus TCP. I am using simatic mananger  V 5.6+ HF1

thanks

Hello Muhammed;

Actually, you can find the manual for the Modbus TCP CP redundant library here:

SIMATIC Modbus/TCP Redundant communication via the CP 443-1 in H-systems

https://support.industry.siemens.com/cs/au/en/view/109739212

You will use the Modbus_Hparam_CP to assign the Modbus and Connection Parameters for the subsequent blocks.

You then have to choose between the blocks MB_RedCL (Modbus client) or MB_RedSV (Modbus server) depending on how you want to operate the Modbus TCP setup.

Hope this helps,

Daniel Chartier