Siemens Simatic S7-400 - Page 91

Programming the OPC UA client blocks
5.5 FB232 UA_NodeGetHandleList
CP 443-1 OPC UA
Operating Instructions, 01/2017, C79000-G8976-C427-02
91
Parameter
Declaration
S7 data type
Range of values
Meaning
NodeHdls OUT ARRAY of
DWORD
0 .. 4 294 967 295 Array of the handles that the OPC UA server
assigns as the reply to the client's query. The
handles serve to uniquely identify the item on
the server.
The handles remain valid until they are re-
leased by calling the
UA_NodeReleaseHandleList block, in other
words become invalid.
When a session is terminated, the CP cancels
all registered node handles of this session.
The parameter is used for the input parameter
"NodeHdls" of the "UA_ReadList" and
"UA_WriteList" blocks.
Done OUT BOOL 0, 1 Status parameter for block processing
• 0: Block execution aborted, not yet complet-
ed or not yet started
• 1: Block processing completed without er-
rors
Busy OUT BOOL 0, 1 Status parameter for block processing
• 0: Block not being processed
• 1: Block currently executing
Error OUT BOOL 0, 1 Error code
• 0: No error
• 1: An error has occurred. See "" parameter
"ErrorID".
ErrorID OUT DWORD See “Meaning” Output of the error number when "Error" = 1.
For the significance of the numbers, refer to the
section Error numbers (Page 107).
NodeErrorIDs OUT ARRAY of
DWORD
See “Meaning” Contains the error numbers for all elements of
the data area of "NodeIDs".
For the significance of the numbers, refer to the
section Error numbers (Page 107).