node-red-contrib-opcua

A Node-RED nodes to communicate or serve via OPC UA.

based on node-opcua

Install

Run command on Node-RED installation directory.

npm install node-red-contrib-opcua

or run command for global installation.

npm install -g node-red-contrib-opcua

Usage

Use OpcUa-Item to define variables. Use OpcUa-Client to read / write / subscribe / browse OPC UA server.

See some flows under Examples. Updated server sub-flow example OPCUA-TEST-NODES.json look commands: addFolder, AddVariable, setFolder.

Here you got some ready to use examples. You can use the Import in Node-RED in the right upper corner menu.

Examples are available for Schneider IGSS and Prosys Simulation Server as Node-RED flow. Search for OPC UA on: http://flows.nodered.org/

Message parameters

Input message

Property	Function/Value	Notes
payload	set interval for subscription or monitorItem
interval	Subscription interval
queueSize	Subscription queue size
deadbandType	"a" abs. or "p" percent	Action monitor
deadbandValue	integer for deadband	Action monitor
topic	NodeId and DataType in format ns=3;s=Counter;datatype=Int32
action	subscribe	nodeId / variable
	unsubscribe	nodeId / variable
	deletesubscription	subscription
	browse	nodeId / folder
	info	nodeId
	read	nodeId
	write	nodeId & value
	monitor	deadbandtype abs/pro
	events	nodeId
	readmultiple	[nodeId + datatype]
	writemultiple	[nodeId + datatype + value]

readmultiple to readmultiple items writemultiple to write multiple items clearitems to empty multiple items (readmultiple / writemultiple)

Output message

Property	Function/Value	Notes
payload	dataValue.value.value
statusCode	OPC UA StatusCode
sourceTimestamp	Source timestamp
serverTimestamp	Server´s timestamp

Advanced examples

• needed from users (add links to examples folder)

Authors

• since 2015 Mika Karaila
• since 2016 Klaus Landsdorf

Testing

karma start opcua.conf.js --log-level debug --single-run

TBD List

Nodes	Function	Done
All
	Project structure	✅
	Async calls	🌒
	UnitTesting	🌑
	Documentation	🌓
Item		✅
Browser
	Browse	✅
	Simple UI interface	🌓
Client
	Read	✅
	Read Multiple	✅
	Write	✅
	Write Multiple	✅
	Subscribe	✅
	Unsubscribe	✅
	DeleteSubscription	✅
	Info	✅
	Browse	✅
	AE	🌑
	reconnect on error	🌒
Server
Commands
	Restart	✅
	Add Folder	✅
	Set Folder	✅
	Add Variable	✅
	Add Object	🌑
	Add Method	🌑
	Add Equipment	🌓
	Add PhysicalAssets	🌓
	Delete by NodeId	✅
Examples
	Methods
	Structures
	Variables
	Objects
	AE
Alarm and Events
	Subscribe	✅

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