Siemens Simatic S7-400 Operating Instructions

Programming the OPC UA client blocks
5.6 FB233 UA_NodeReleaseHandleList
CP 443-1 OPC UA
92 Operating Instructions, 01/2017, C79000-G8976-C427-02
5.5.3
UDT753 UANodeID
UANodeID
The following table shows the meaning of the parameters of UANodeID to identify the target
node on the OPC UA server. UANodeID supplies the parameter "NodeIDs" of the
UA_NodeGetHandleList" block.
Table 5- 6 Parameters of UDT UANodeID
Parameter
S7 data
type
Range of
values
Meaning
NamespaceIndex
WORD
0 .. 65535
Index of the name space of the server
Identifier STRING Max. 254 Specifies the nodeID in the name space index.
IdentifierType WORD 1 .. 2 Specifies the format and the area of application
(generally the server) of the node ID. Supported
types:
• 1: UAIdentifierType_String
String identifiers distinguish upper and lower
case.
• 2: UAIdentifierType_Numeric
Numeric identifier
5.6
FB233 UA_NodeReleaseHandleList
5.6.1
Function and call interface - UA_NodeReleaseHandleList
Function of the block
With the block you release the node handles of the current session on the connected UA
server. This deletes the list.
The input parameter "NodeHdls" references the data block to which the handles of the
output parameter "NodeHdls" of the "UA_NodeGetHandleList" block are written.
The number of handles at the input parameter "NodeHdlCount" is always 1 so you need to
call the block separately for each handle.

Siemens Simatic S7-400 Specifications

General

Programming Language	STEP 7 (LAD, FBD, STL, SCL, GRAPH)
Communication Interfaces	MPI, PROFIBUS
Power Supply	24 V DC, 120/230 V AC (Power supply modules are separate and chosen based on system requirements)
Operating Temperature	0°C to 60°C
Mounting	Rack mounting
Processor	CPU 412-1, CPU 414-2, CPU 416-2, CPU 417-4 (Different CPUs offer varying performance and features)
Relative Humidity	5 to 95% (non-condensing)