Siemens SIMATIC S7-1500 Function Manual page 217

OPC UA communication
9.3 Using the S7-1500 as an OPC UA server
System data type "OPC_UA_NodeId"
For the OPC UA basic data type "OpcUa_NodeId", please refer to the following table for the
meaning of the parameters. Use OPC_UA_NodeId for the identification of a node in the
OPC UA server.
Parameter
NamespaceIndex
Identifier
IdentifierType
System data type "OPC_UA_QualifiedName"
See the following table for the structure of the system data type "OPC_UA_QualifiedName":
Name
NamespaceIndex
Name
UDT "Guid"
For the basic data type "Guid", create the following PLC data type. The default values used
as examples can also be set differently.
Figure 9-40
216
S7 data type
UINT
WSTRING[254]
UDINT
S7 data type
UINT
WSTRING[64]
"Guid" UDT
Meaning
Namespace index of the node in the OPC UA server.
A node can, for example, be a tag.
The designation of the node (object or tag) depends on the
identifier type:
Numeric identifier: The node is labeled with a number,
•
for example "12345678".
String identifier: The node is labeled with a name, for
•
example "MyTag". No distinction is made between upper
and lower case.
Type of identifier
0: Numeric identifier
•
1: String identifier
•
2: GUID
•
3: Opaque
•
Meaning
The namespace index of the name.
Name of the node or tag.
Function Manual, 11/2019, A5E03735815-AH
Communication