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New!PLCopen 15 years anniversary brochure! |
TC4 - Communication
PLCopen
is re-activating the Technical Committee TC4
Communications with a new working item “IEC
61131-3 INFORMATION MODEL IN OPC UA”
The
OPC Foundation is currently developing new
specifications called Unified Architecture (OPC UA).
Sector or application specific information
models are part of these specifications. Such
information models are under development e.g. for
Electronic Device Description (EDD) or Field Device
Tool (FDT). It is important that the PLC as the main
component of automation systems remains / becomes
visible in the vertical information integration
which will be strongly influenced by OPC UA. OPC UA
servers which represent their underlying
manufacturer specific PLCs in a similar IEC 61131-3
based manner will provide a substantial advantage
for client applications as e.g. visualizations or
MES systems. PLC vendors may reduce costs for the
development of these OPC UA servers if an IEC
61131-3 based information model is already available
in OPC UA. The
goal of TC4 is to define an IEC 61131-3 based
information model as additional part of the overall
OPC UA specification. The necessary information
model already exists in the standard IEC 61131-3
(software model), but must be (re-) specified
according to the guidelines and the technical
requirements of OPC UA, without changing its
contents. A close co-operation with the OPC
Foundation will be established, resulting e.g. in a
joint working group and shared documents. The
kick-off meeting is set for October 14, 2008 in
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