Rockwell Automation 1757-PROCESSLINX ProcessLinx OPC Server to Server Software User Manual - Manual (Page 21)

1 Publication 1757-UM002B-EN-P - January 2003
Chapter
3
ProcessLinx TagMap Configuration
A ProcessLinx TagMap configuration is created to communicate OPC
items (also known as tags) from one OPC server to another. This
configuration maps each data point exchanged between systems using
the OPC protocol.
The ProcessLinx configuration is a hierarchy of user-defined objects.
The top-level object is a Pipe. A Pipe defines which OPC Servers are
used for data exchange. It also defines the primary and secondary PC (if
available) hosts of the external OPC Server(s). The next level down is
called a Group.
Each Pipe contains Groups. Groups contain TagMap definitions. Each
Group object can contain as many TagMaps as needed, collectively
“Grouping” similar tags together. The Group is conceptually similar to
a file folder. All TagMaps in a Group have the same data update rates,
dead band, time bias and data flow direction for all TagMaps. During
runtime, each defined ProcessLinx Group creates and encapsulates an
OPC-standard Group.
A TagMap defines the source and destination OPC Items for each data
point. Each map specifies the actual OPC Item names, OPC Server
Access paths, data flow/data master, and scaling options. In runtime,
the TagMap object contains an OPC-standard Item object for each
server.