Rockwell Automation FactoryTalk Transaction Manager User Guide - Manual (Page 66)

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FactoryTalk Transaction Manager User Guide
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If you need updated tags at a faster rate, use the FactoryTalk Live Data, RSLinx
Classic OPC, or Generic OPC control connectors to retrieve data from the devices
directly.
To interface with tags provided by FactoryTalk View SE, use the FactoryTalk Live
Data control connector.
Generic OPC
The Generic OPC control connector service can be used to interface with
items provided by any OPC server that conforms to the OPC custom
interface specifications. The Generic OPC connector is an OPC client that
supports OnDataChange subscription callback using either:
 IAdviseSink– for OPC 1.0A-compliant servers.
 IConnectionPoints– for OPC 2.0-compliant servers.
The Generic OPC connector service tries to establish the IAdviseSink
method, and then tries the IConnectionPoints method. Data writes to OPC
items are performed using Asynchronous Writes. FactoryTalk Transaction
Manager also supports Asynchronous Reads from Device as an option for
OPC servers that support this method.
Enterprise Database Connectors
The enterprise database connector services (Microsoft OLE DB, ODBC, or
Oracle OCI) manage FactoryTalk Transaction Manager's interaction
between a database and the Transaction Control Manager service or
FactoryTalk Transaction Manager service. Each enterprise database
connector service can manage connections with multiple databases on
multiple computers.
For transactions that update existing records, the data values that are used to
look up a record in the database may update zero or more records in the
database. If one or more records is selected, the transaction updates all of the
selected records. If no records area selected, the transaction converts from
Update to Insert mode, and the transaction is inserted into the database. This
is not an error condition.