Try MatrikonOPC Data Manager for FREE now. The MatrikonOPC Data Manager 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.
Matrikon's OPC Data Manager (ODM) is a software application that transfers data from one OPC server to another. Use ODM when you need to share data between two or more control systems (e.g. PLC and a DCS). With ODM this connectivity can be accomplished with standard, off-the-shelf software.