If you want to use a predefined OPC UA node in your commissioning file, you can use a Node reference to achieve that. One use case of that is placing newly defined nodes at the certain point in the OPC UA server tree. The other possibility is to publish data of predefined nodes as MQTT capable nodes.
It is possible to create an instance of an object type by using the resource type Cybus::Node::OpcuaObject
Service Commissioning File Example
---
description: Test for placing a ToolType inside a MachineTool instance
metadata:
name: Tooltype placement test
resources:
opcuaServer:
type: Cybus::Server::Opcua
properties:
hostname: 192.168.178.46
securityModes: ['None', 'SignAndEncrypt']
securityPolicies: ['None', 'Basic256Sha256']
nodesetFiles: ['di', 'machinery', 'machineTool']
allowAnonymous: true
port: 4841
######################################
#
# referencing the "Machines" folder
# which got provided by the Machinery
# nodeset file
#
######################################
machineRoot:
type: Cybus::Node::OpcuaReference
properties:
parent: !ref opcuaServer
referenceNodeId: 'i=1001'
namespaceUrl: 'http://opcfoundation.org/UA/Machinery/'
######################################
#
# instantiating a MachineToolType
# from the MachineTool type
#
######################################
testMachineToolType:
type: Cybus::Node::OpcuaObject
properties:
parent: !ref machineRoot
browseName: MyMachineToolTypeTest
objectTypeName: MachineToolType
sourceNamespaceUrl: 'http://opcfoundation.org/UA/MachineTool/'
######################################
#
# referencing the "Equipment" subfolder
# of the instantiated toolType
#
######################################
EquipmentFolder:
type: Cybus::Node::OpcuaReference
properties:
parent: !ref testMachineToolType
relativeBrowsePath: '/4:Equipment'
######################################
#
# add a toolList type
# of the instantiated toolType
#
######################################
toolList:
type: Cybus::Node::OpcuaObject
properties:
parent: !ref EquipmentFolder
browseName: Tools
objectTypeName: ToolListType
sourceNamespaceUrl: 'http://opcfoundation.org/UA/MachineTool/'
#########################################
#
# instantiating a ToolType and placing it
# into the tools list folder of the instance
#
########################################
demoToolInstance:
type: Cybus::Node::OpcuaObject
properties:
parent: !ref toolList
browseName: DemoTool
objectTypeName: ToolType
sourceNamespaceUrl: 'http://opcfoundation.org/UA/MachineTool/'
Preexisting nodeIds can be referenced using an absolute nodeId, e.g ns=1;s=1001. It is also possible to reference a nodeId by a browsePath from a certain start point that needs to be specified as well.
