SI-Ethernet User Guide 181
Issue: 1
Safety
information
Introduction
Mechanical
installation
Electrical
installation
Getting started Parameters
Key features
and Protocols
PC Applications Security Diagnostics
Glossary of
terms
Index
8.5 CT OPC server
OPC is a set of standards written to facilitate connection of a software application such
as SCADA and HMI to industrial equipment such as drives and PLCs. Provided such
devices have an associated OPC server (inbuilt or external), the standard removes the
need for such applications to have any knowledge of how to obtain data from the
device. If such applications implement an OPC client they can then obtain data from
any devices for which OPC servers exist.
The OPC Data Access specification is based around Microsoft COM & DCOM
technology and so servers and clients will typically be running on a Microsoft Operating
system. The client and server can both run on the same computer or they can be
connected via a standard network such as Ethernet.
The CT OPC server will allow software systems containing an OPC Data Access client
to communicate with Unidrive M over Ethernet or Modbus RTU. It does not support any
other manufacturers product. The server uses proprietary protocols to gather and
distribute data to and from Unidrive M and offers a standard OPC DA interface to OPC
Clients.
The CT OPC server supports versions 1, 2 and 3 of the OPC DA server specifications.
These specifications are obtainable from the OPC foundation
http:\\www.opcfoundation.org.
For more information on using the CT OPC server please refer to the online help
supplied.
The CT OPC server was originally developed for use with Unidrive SP, some limitations
exist when used with Unidrive M, these limitations include:
• Unidrive M parameter database not supported
• No access to option module parameters (except SI-Applications Plus)
• Only parameters 99 or less can be directly accessed
(Parameters with a number of greater than 99 can be mapped to menu 0 and
the menu 0 parameter then accessed).
CT OPC server V03.01.00 or later supports TCP/IP over Ethernet.
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