Third Party OPC Client Connection to 800xA may fail if the OPC Redistributable Components are not installed.
Cause: OPC redistributables not installed. Resolution:
Install redistributables from OPC Foundation website, or copy OPCPROXY.DLL, OPCCOMN_PS.DLL, and OPCENUM.EXE to the non-800xA node and register the first two. Also ensure DCOM is set properly per the Configuration manual.