Hi The_Plc_Kid. From what I see on page 1, it looks like Plast-Control provides the OPC Server software for you, so Kepware wouldn't be required to talk to the ACS. So, all you need to do is get the data from the ACS into ControlLogix? The ControlLogix can not serve as an OPC Client because OPC is based on Microsoft technologies, as rdcast mentioned, so it looks like you'll be stuck with a PC talking between the ACS and the ControlLogix. The PC will have the Plast-Control OPC Server for talking to the ACS and Kepserver or the like for talking to the PLC, then a higher level program as the OPC Client (A VB Program? Kepserver includes some nice samples) to exchange the data between the the two servers with the device data.
This is not ideal, it would be so much easier if Plast Control would provide an Ethernet IP Driver and could be added as a "Generic Ethernet Module". Are there any other Industrial Ethernet protocols on the ACS? Modbus TCP? I think Prosoft has a nice Modbus TCP card for the ControlLogix.