Yes, you can configure redundant communication by connecting two PLCs to the [R Product].

In TOP Design Studio, go to the [Project] > [Properties] menu at the top.
In the [Device Settings] section on the left, select the PLCs you want to use for redundancy.
On the right, you will see the [Enable Redundancy] checkbox.

Check [Enable Redundancy].

The Primary Option is for the settings of the first PLC.

The Secondary Option is for the settings of the second PLC.

With this configuration, if communication with the first PLC (Primary) is lost and a timeout occurs, the system will automatically switch to the second PLC (Secondary) after 5 seconds and continue communication.

 

By using the redundancy function, communication will be maintained even if the first PLC fails, as it will automatically switch to the second PLC.
When setting up redundancy, make sure that the communication parameters (such as Address Mode, Notation, etc.) for both the Primary and Secondary PLCs are the same. You can also configure the redundancy operation conditions (timeout, switching criteria, etc.) within the project.