A high-availability control system for an industrial process including operator stations displaying information, and an interface including a pair of computers for each model, each collecting each item of data received by each controller having the model and eliminating the duplicates, wherein the computers operate in asynchronous redundancy. The system also includes a processor including a pair of computers that each receive the collected data, sort the data received as a function of their acquisition time, eliminate the duplicates and calculate an information group by acquisition time, wherein the computers operate in active redundancy. The system also includes managing the operator stations including one computer per operator station, each receiving each calculated information group and sending to the operator station each information group corresponding to the subset of information. The system also includes a duplicate communication network comprising a distributed redundancy module that manages the message exchanges between the computers.