PLC Client Function Blocks based on IEC 61131-3

FB-Name			UA_NodeGetHandleList
This Function Block is used to get node handles for multiple nodes.
VAR_INPUT
B	Execute	BOOL	FB performs its task on rising edge on this input.
B	ConnectionHdl	DWORD	Connection handle.
B	NodeIDCount	UINT	Number of NodeIDs in Array of NodeIDs.
B	NodeIDs	ARRAY OFUANodeID	See UANodeID. Length is vendor-specific (MAX_ELEMENTS_NODELIST). See Constants of Array Lengths Array length of NodeIDs and NodeHdls must be same.
B	Timeout	TIME	Time to response.
VAR_OUTPUT
B	Done	BOOL	FB has completed its task.
B	Busy	BOOL	The FB is not finished and new output values are to be expected.
B	Error	BOOL	Signals that an error has occurred within the FB. Set to TRUE if either ErrorID or any of the NodeErrorIDs indicates an error.
B	ErrorID	DWORD	Error code.
B	NodeErrorIDs	ARRAY OFDWORD	Array of NodeErrorIDs. Contains an error code for each valid element of the NodeIds array. Length is vendor-specific (MAX_ELEMENTS_NODELIST). See Constants of Array Lengths Shall be same size like the NodesIDs array length.
B	NodeHdls	ARRAY OFDWORD	Array of Node Handles. Length is vendor-specific (MAX_ELEMENTS_NODELIST). See Constants of Array Lengths Array length of NodeIDs and NodeHdls must be same.
Notes: The NodeHdl is a reference to the internal management object for the node in the client. However, the internal client implementation shall also register the node at the server (“RegisterNode”). This enables the OPC UA Server to optimize the communication.