Here's two ideas: 1. You can get an OPC server for the Allen Bradley PLC and map some of it's registers to tags in the OPC server. You can then bridge the OPC servers using a tool like Linkmaster from Kepware http://www.kepware.com/Products/products_linkmaster.asp Or, 2. if the PLC is a control logix type, you could always use a custom block from SQL4automation.com might be a more streamlined (and cheaper) solution. Good luck!