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FB-Name |
UA_Connect |
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This Function Block is used to create a (optional secure) transport connection and an OPC UA session. The connection shall be terminated by calling the UA_Disconnect after establishing the connection. |
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VAR_INPUT |
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B |
Execute |
BOOL |
On rising edge connection is started. |
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B |
ServerEndpointUrl |
Vendor specific |
Shall be STRING or WSTRING. The recommendation for new implementation is to use WSTRING. URL |
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B |
SessionConnectInfo |
STRUCT |
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B |
Timeout |
TIME |
Maximum time to establish the connection. |
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VAR_OUTPUT |
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B |
Done |
BOOL |
Signals a connection has been initially established. |
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B |
Busy |
BOOL |
The FB is not finished and new output values are to be expected. |
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B |
Error |
BOOL |
Signals that an error has occurred within the FB. |
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B |
ErrorID |
DWORD |
Error code. |
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B |
ConnectionHdl |
DWORD |
Connection handle – is valid until UA_Disconnect is called. |
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Notes: The connection monitoring and the reconnect handling are to be done by the client vendor implementation. The reconnect sequence is defined in OPC 10000-4. |
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UA_Connect |
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BOOL |
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Execute |
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Done |
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BOOL |
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Vendor specific |
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ServerEndpointUrl |
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Busy |
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BOOL |
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STRUCT |
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SessionConnectInfo |
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Error |
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BOOL |
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TIME |
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Timeout |
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ErrorID |
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DWORD |
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ConnectionHdl |
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DWORD |
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