Server Class Reference

Represents an OPCUA server. More...

Inherits object.

Public Member Functions
int	add_namespace (self, str name)
	Adds a new namespace defined as a string to the server. More...
None	add_node (self, cvb.opcua.BaseNode node)
	Adds an OPCUA node to the server. More...
cvb.opcua.Server	create (int port)
	Creates an OPCUA server with the specified port number. More...
None	delete_node (self, cvb.opcua.NodeID node_id)
	Removes an OPCUA node from the OPCUA server. More...
Union[cvb.opcua.BaseNode, cvb.opcua.IntegerNode, cvb.opcua.StringNode, cvb.opcua.FloatNode, cvb.opcua.VariableNode, cvb.opcua.MethodNode, cvb.opcua.ObjectNode]	node (self, cvb.opcua.NodeID node_id)
	Returns the node with the given node ID. More...
None	start (self)
	Starts the OPCUA server.
None	stop (self)
	Stops the OPCUA server.

Properties
	discoveryURL = property
	str: Gets the URL of an OPCUA server as string. More...

Detailed Description

Represents an OPCUA server.

It handles the server-side of the OPCUA client/server interaction. Unlike the cvb.opcua.Client, the server has start and stop operations. Primary tool for OPCUA modeling is the Server.add_node method. See also cvb.opcua.BaseNode for details.

Member Function Documentation

add_namespace()

int add_namespace	(		self,
		str	name
	)

Adds a new namespace defined as a string to the server.

The namespace index of this namespace will be returned. The namespace index of the new assigned namespace is always assigned by the OPCUA server.

Parameters

name : str Name for the new namespace.

Returns

int The namespace index.

add_node()

None add_node	(		self,
		cvb.opcua.BaseNode	node
	)

Adds an OPCUA node to the server.

See also cvb.opcua.BaseNode on node creation.

Parameters

node : cvb.opcua.BaseNode Node to be added.

create()

cvb.opcua.Server create

(

int

port

)

Creates an OPCUA server with the specified port number.

The port must be a valid positive integer number. 4840 and 4843 are reserved for the OPCUA TCP protocol. They are usually used to connect to an LDS server. If you want to define a different number, please use a number in between 1024 and 65535 to avoid conflicting with well known ports, that are registered by the Internet Assigned Numbers Authority.

Parameters

port : int The port number.

Returns

cvb.opcua.Server The server object.

delete_node()

None delete_node	(		self,
		cvb.opcua.NodeID	node_id
	)

Removes an OPCUA node from the OPCUA server.

Parameters

node_id : cvb.opcua.NodeID OPCUA node ID of the node to be removed form the server.

node()

Union[cvb.opcua.BaseNode, cvb.opcua.IntegerNode, cvb.opcua.StringNode, cvb.opcua.FloatNode, cvb.opcua.VariableNode, cvb.opcua.MethodNode, cvb.opcua.ObjectNode] node	(		self,
		cvb.opcua.NodeID	node_id
	)

Returns the node with the given node ID.

Parameters

node_id : cvb.opcua.NodeID Node ID for the desired node.

Returns

Union[cvb.opcua.BaseNode, cvb.opcua.IntegerNode, cvb.opcua.StringNode, cvb.opcua.FloatNode, cvb.opcua.VariableNode, cvb.opcua.MethodNode, cvb.opcua.ObjectNode] The node object; the object type will be the specialized if possible.

Property Documentation

discoveryURL

discoveryURL = property

static

str: Gets the URL of an OPCUA server as string.

The OPCUA server must be running on the URL being retrieved.