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3. Perform wanted actions (Get / Set parameters, Get curves...)
4. Go back to step 3. while the connection should be active
5. Disconnect from the RVT
One should not forget the authentication phase otherwise no subsequent action will be
possible and the connection will be closed by the RVT. Moreover, the authentified user's
access level will make it possible to perform certain actions or not.
Unwanted TCP/IP or serial disconnections with the RVT can be monitored through the
callback provided at initialization time or through the returning o of the
"RVT_SYS_SOCKET_DISCONNECTED" code. When that is happening, it is necessary to
call the clean function and try to connect to the RVT again.
6.4 Error codes
The following error codes can be returned by the DLL:
Error code define
RVT_SUCCESS
RVT_SYS_MEMORY
RVT_SYS_TASK_CREATE
RVT_SYS_SEMAPHORE_CREATE
RVT_SYS_SEMAPHORE_FAILURE
RVT_SYS_PERIPHERAL_IO
RVT_MEMORY_CORRUPT
RVT_SYS_SOCKET_OPEN
RVT_SYS_SOCKET_BIND
RVT_SYS_SOCKET_LISTEN
RVT_SYS_SOCKET_CONNECT
RVT_SYS_SOCKET_DISCONNECTED 14
RVT_SYS_INVALID_OBJECT
RVT_SYS_BUFFER_OVERFLOW
RVT_SYS_BUFFER_TOO_SMALL
RVT_NO_MORE_OBJECT_ALLOWED 20
RVT_OBJECT_NOT_FOUND
RVT_OBJECT_OPEN_ERROR
RVT_OBJECT_IO_ERROR
RVT_NO_MORE_OBJECT
RVT_OBJECT_DISABLED
RVT_OBJECT_ALREADY_USED
RVT_PKT_MALFUNCTION
RVT_SECL_UNKNOWN_LOGIN
RVT communication ç Windows communication DLL for PQ-Link protocol - 75
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