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Presentation
(
continued)
0
Software
3
OPC data server software
OPC Factory Server
Supported architectures
(
continued)
Remote access from an OPC .NET client
The .NET client application and the OFS data server are on remote stations.
Communication between the client station and the OFS server is conducted through
the DCOM layer (Microsoft) via the OPC-DA protocol.
The .NET Microsoft compatibility of the OFS server has been developed to allow an
OPC .NET client to access OFS server items on an Intranet network via the OPC .NET
API interface.
This interface ensures interoperability between existing OPC applications and
applications developed in the standard .NET environment.
Remote access from an OPC XML-DA client via HTTP
The client application program and the OFS server are on remote stations, using the
SOAP protocol to communicate via the Internet in conformity with the OPC XML-DA
V1.01 specification of the OPC Foundation.
The OFS data server is based on an HTTP server installed on the same station.
The OPC XML-DA V1.0 specifications are designed to overcome the limitations of
COM/DCOM by providing:
b
An OPC interface for Windows and non-Windows client applications
b
Beyond the Intranet perimeter, remote access via the Internet through firewalls
The OPC XML-DA specification is based on Web Services standards such as SOAP,
XML and WSDL
(1)
.
A SOAP client can access data on the OFS server via Intranet or
Internet using the SOAP protocol in conformity with the OPC XML-DA V1.01
specification of the OPC Foundation.
(1)
SOAP: Simple Object Access Protocol
XML: Extensible Markup Language
WSDL: Web Services Description Language.
Server
OFS station
Intranet
.
NET client
Ethernet Modbus/TCP network
DCOM
Site server
and OFS
station
Symbol data
(
Unity Pro,
Concept or PL7)
Industrial network
IIS
Internet
Industrial PLCs
Remote client
application
program
Firewall
Setup:
page 6/65
Functions:
page 6/66
References:
page 6/67
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