Hot configuration

In the hot failover configuration, there must be two redundant RTUs available. Each RTU must have the same DNP3 Slave address, but communicate on different ports. Each interface in the failover configuration will use a Device Configuration (XML) File that contains information on how to connect to the DNP3 Slave RTU assigned to that particular interface instance.

Each RTU must contain redundant/identical data. Moreover, each RTU responds to requests from its corresponding PI DNP3 interface master. This allows for both interface instances in the configuration to collect identical data and in turn allows for the RTU to clear its event buffers after servicing requests from its master.

Below is an example of a typical UniInt Hot Failover Configuration.