Rockwell Automation FactoryTalk Transaction Manager User Guide - Manual (Page 73)

Chapter 5
73
Defining Data Points
Introducing Data Points
Data points are specific data locations or registers in the control system that
are made available to FactoryTalk Transaction Manager transactions. The
software can read from, and write to, data points through the embedded
FactoryTalk Live Data control connector (Transaction Control Manager
service) or a control connector (FactoryTalk Transaction Manager service).
The control connector then communicates with a data server (based on OPC,
DDE, or FactoryTalk) that communicates with the control system devices.
Once defined, a data point can be used by multiple transactions.
Using FactoryTalk Transaction Manager, you can assign the following
attributes to a data point:
 Item string or address.
 Data point name.
 Data type.
 Number of elements.
 Mode and Scan rate.
 Retrieval timeout.
 Substitution options.
These attributes are assigned by defining data points on the Data Point
Definition dialog boxes (click Step 3 on the Configuration Checklist). These
dialog boxes allow you to browse for data locations serviced by a data