system.opcua.addConnection

New in 8.1.8

This function is used in Python Scripting.

Description

Adds a new OPC UA connection.

Client Permission Restrictions

This scripting function has no Client Permission restrictions.

Syntax

system.opcua.addConnection(name, description, discoveryUrl, endpointUrl, securityPolicy, securityMode, settings)

Parameters

Type	Parameter	Description
String	name	Name to assign to the new connection.
String	description	Description assigned to the new OPC UA connection.
String	discoveryUrl	Endpoint URL to use for discovery services.
String	endpointUrl	Endpoint URL to use for session services.
String	securityPolicy	The name of the SecurityPolicy to use. See the Security Policy table below for possible values.
String	securityMode	The name of the MessageSecurityMode to use. See the Message Security Mode table below for possible values.
Dictionary[String, Any]	settings	A dictionary of additional settings to apply to the connection. See the Settings table for a table of possible keys.

Returns

Nothing

Scope

Gateway, Perspective Session

Security Policy

Below is a listing of supported values for the securityPolicy argument:

• None
• Basic128Rsa15
• Basic256
• Basic256Sha256
• Aes128_Sha256_RsaOaep
• Aes256_Sha256_RsaPss

Message Security Mode

Below is a listing of supported values for the messageSecurityMode argument:

• None
• Sign
• SignAndEncrypt

Settings

Below is a listing of supported values for the settings argument:

Key	Data Type
ENABLED	Boolean
DISCOVERYURL	String
ENDPOINTURL	String
SECURITYPOLICY	String
SECURITYMODE	String
USERNAME	String
PASSWORD	String
HOSTOVERRIDE	String
CONNECTTIMEOUT	Integer
ACKNOWLEDGETIMEOUT	Integer
REQUESTTIMEOUT	Integer
SESSIONTIMEOUT	Integer
MAXPEROPERATION	Integer
MAXREFERENCESPERNODE	Integer
MAXPENDINGPUBLISHREQUESTS	Integer
MAXNOTIFICATIONSPERPUBLISH	Integer
MAXMESSAGESIZE	Integer
MAXARRAYLENGTH	Integer
MAXSTRINGLENGTH	Integer
TYPEDICTIONARYFRAGMENTSIZE	Integer
KEEPALIVEFAILURESALLOWED	Integer
KEEPALIVEINTERVAL	Integer
KEEPALIVETIMEOUT	Integer
BROWSEORIGIN	String
CERTIFICATEVALIDATIONENABLED	Boolean
KEYSTOREALIAS	String
KEYSTOREALIASPASSWORD	String
FAILOVERENABLED	Boolean
FAILOVERTHRESHOLD	Integer
FAILOVERDISCOVERYURL	String
FAILOVERENDPOINTURL	String
FAILOVERHOSTOVERRIDE	String

Code Examples

Example #1

# The following could be used to connect to Ignition's OPC UA server.
system.opcua.addConnection(
    "test",
    "test desc",
    "opc.tcp://localhost:62541/discovery",
    "opc.tcp://localhost:62541",
    "Basic256Sha256",
    "SignAndEncrypt",
    {
    "username":"opcuauser",
    "password":"password"
    }
)