|
@@ -4,7 +4,7 @@ OPC UA in a nutshell
|
|
|
OPC UA, a collection of services
|
|
|
--------------------------------
|
|
|
|
|
|
-In OPC-UA, all communication is based on service calls, each consisting of a request and a response
|
|
|
+In OPC UA, all communication is based on service calls, each consisting of a request and a response
|
|
|
message. Be careful to note the difference between services and methods. Services are pre-defined in
|
|
|
the standard and cannot be changed. But you can use the *Call* service to invoke user-defined
|
|
|
methods on the server.
|
|
@@ -22,9 +22,9 @@ each service is implemented in a single function. See the \ref services section
|
|
|
+-----------------------------+-----------------------------+------------------------------+
|
|
|
| GetEndpoints | CloseSecureChannel | ActivateSession |
|
|
|
+-----------------------------+-----------------------------+------------------------------+
|
|
|
-| RegisterServer | CloseSession | |
|
|
|
+| RegisterServer | | CloseSession |
|
|
|
+-----------------------------+-----------------------------+------------------------------+
|
|
|
-| Cancel | | |
|
|
|
+| | | Cancel |
|
|
|
+-----------------------------+-----------------------------+------------------------------+
|
|
|
|
|
|
**Interaction with the information model**
|