Try MatrikonOPC Redundancy Broker for FREE now. The MatrikonOPC Redundancy Broker download is shareware that can be distributed freely. It is a fully functioning application that can be used for 30 days after which time it must be licensed.
The MatrikonOPC Redundancy Broker (ORB) enables easy implementation of redundancy in systems that take advantage of OPC technology. ORB is designed for OPC applications that must use redundant hardware and/or software to achieve the highest degree of communication reliability. ORB can even be retrofitted to current systems since ORB functions with any OPC server, regardless of vendor.