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Data from IRB5400

Hello,
We have ABB Robot IRB5400 with S4P+ cabinet.
The ABB robot communicate with S7 PLC but we want to collect more data from this robot.
The robot communicate with a Windows XP PC with a manufacturer software, on this PC there is WebWare software.
How can I get more data from the ABB robot using indsutrial protocol or using WebWare OPC ?