OLE for Process Control is a widely adopted industry standard for communication between applications in a control system: It's a beautiful thing when it works. Many of you have dreamed of the day when a process control system would easily allow third-party applications to read and write data in a standard way without a custom, proprietary interface. You remember the days when a vendor with a slick advanced control application spent weeks at your site just to get the darn thing to communicate with your digital control system. You remember two vendors sitting in a room with you trying to convince you the other guy is to blame for communications problems. You remember staring at a protocol analyzer and digging through code and log files to figure out what is going on. You dream of an end to this nightmare. Keep dreaming. The day has not quite arrived.
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