Modbus master - slave communication

[Nikolay]

Dear colleagues.
I have a problem. I have many controllers (about 100 pieces), these controllers can send telegrams to the system. That is, the Scada System must act as the SLAVE, and the controllers in the role of MASTER. I'm trying to create 1 DPE to listen to all the controllers at the same time, but I can not do it. Help, please, to solve this task.
Thank you in advance.

https://www.winccoa.com/fileadmin/image ... 171211.png

[Gertjan van Schijndel]

The Modbus server is better suited for this than the Modbus driver.

[Nikolay]

I'm working in WinCC OA 3.13, and in this version I did not meet the ModBus server. This functionality was added in version 3.15?

[leoknipp]

The Modbus server is available since WinCC OA version 3.14.

Best Regards
Leopold Knipp
Senior Support Specialist

[Nikolay]

Installed version 3.14. In the driver settings, a new "Only active driver" menu item has appeared. Is this what I need? In the documentation about this innovation nothing is written. And what should be the Peripheral address configuration for DPE?

[leoknipp]

The option "Only active driver" is part of the Modbus TCP client configuration. Also peripheral addresses are only used when configuring a Modbus client.

Data which shall be provided by the WinCC OA Modbus TCP server is defined in a CNS view (Plant Model Editor).

Best Regards
Leopold Knipp
Senior Support Specialist

[Nikolay]

Thank you very much, it's worked!