Try the MatrikonOPC Server for RSLinx for FREE now. The MatrikonOPC Server for RSLinx 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 Server for RSLinx is an OPC compliant server that enables data interchange between OPC clients and PLCs. The server provides read and write access to basic and structured PLC register types in PLC-5 and SLC-500 PLCs. Communication occurs using RS-LINX, which controls connections via RS-232, DH+, or Ethernet. Either way, the server is self-optimizing and self-configuring to provide easy, efficient, and reliable data transfer.