diff options
| author | Jannis Voelker <jannis.voelker@basyskom.com> | 2018-02-26 08:42:00 +0100 |
|---|---|---|
| committer | Jannis Völker <jannis.voelker@basyskom.com> | 2018-02-28 07:19:19 +0000 |
| commit | bc3a916dc0aa86665eeea5bdac3f0bffc6589793 (patch) | |
| tree | 4aa727159d99af9ae5e899fb27b41c4e6c42e106 | |
| parent | d13d40ec9a88c5ade19e77e9b74f1a5825234332 (diff) | |
Replace introduction to OPC UA in qtopcua.qdoc
The old introduction mainly described features currently not supported
by Qt OPC UA.
Change-Id: Ib94b092ca67a4e29d4e9d3c648cf31d1cb08c28f
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
Reviewed-by: Frank Meerkoetter <frank.meerkoetter@basyskom.com>
| -rw-r--r-- | src/opcua/doc/src/qtopcua.qdoc | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/src/opcua/doc/src/qtopcua.qdoc b/src/opcua/doc/src/qtopcua.qdoc index 75ef0c2..a1aaf82 100644 --- a/src/opcua/doc/src/qtopcua.qdoc +++ b/src/opcua/doc/src/qtopcua.qdoc @@ -67,12 +67,24 @@ The \l{Qt OPC UA Examples}{examples} demonstrate how to use Qt OPC UA API to interact with an OPC UA server. \section1 A short introduction to OPC UA - OPC UA is a protocol for data modelling and secure exchange of data in - industrial applications. - The protocol offers built-in transport security based on certificates and - established cryptographic algorithms. - The data modelling system is object oriented and offers support for - pre-made models which can be extended to fit special needs. + OPC UA is a protocol for data modelling and exchange of data in industrial applications. + + An OPC UA server offers access to data which is organized in a mesh of nodes connected by references. + The use of different reference types and nodes containing metadata enable a client to navigate and interpret + the data without knowing their structure in advance. + + All nodes have a unique identifier and attributes that can be read and written. + Among others, there are Variable nodes which store values and callable Method nodes with attached nodes describing + parameters and return values. Notifications in case of events and monitoring of Variable nodes for value changes are offered too. + + Complex objects can be created by combining nodes using references, inheritance is also possible. + OPC UA offers support for pre-made models which can be extended to fit special needs. + + OPC UA is the platform independent successor of OPC Classic intended for usage on all levels, + from embedded sensors up to manufacturing execution and enterprise resource planning systems. + It has a service oriented architecture based on standardized messages for service requests and responses. + There are different ways for these messages to be encoded and transported over the network. The most common way + is binary encoding over TCP. \section1 Implemented features from the OPC UA protocol |