Patent ID: 7302507
Filing Date: 2007-11-27
Classification: H04L

Abstract:
1. A method of providing a connection between a first device and a second device contained in a process automation system, said process automation system also containing a host controller designed to control operation of said first device and said second device, wherein each of said first device and said second device is implemented as a separate physical unit from said host controller, said method comprising: establishing said connection between said first device and said second device a first field in said first device and a second field in said second device being required to have a same value for communication on said connection between said first device and said second device; storing in a third device data identifying said first field in said first device and said second field in said device; receiving data indicating that said second field has changed to a new value-when said second device is reinitialized; examining said data in said third device to determine that the value in at least one of said first field and said second field is to be changed for communication to continue on said connection between said first device and said second device after said initialization; and reestablishing said connection between said first device and said second device after said reinitialization by changing the value in at least one of said first field and said second field to ensure the values in said first field and said second field are equal, wherein said second device contains a plurality of objects providing said connection, wherein said new value comprises an index indicating a memory location where one of said plurality of objects is stored.