Setup Modbus TCP controller settings for redundant controller in Panel Builder 800

In our project, we use redundant AC902F, with redudant Control Network and 7 PP877K as Modbus TCP Master. In FreeLance Engineering, Modbus TCP Slave Parameter windows has 4 Interface options (All, Interface 1, 3, 4), and in Panel Builder 800, Controller Settings in Tags Function has Stations tab for adding stations. What should i edit in those windows in order to setup Modbus TCP for redundant controllers? Do I need to write some program to handle redundancy toggle?