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Configuration

This section explains each of the properties in the configuration blade.
General
Property
Description
Collection
This associates the Agent to a specific Collection (default to that of the current Data Stream).
Polling Interval (seconds)
A timespan to specify how often should the Agent check for new data/changes or update its cache.
Refer to Collections and Stream Hosts to understand more about Collections.
Connection
Once the Server Url is provided, the Agent will attempt to connect to the Litmus Edge OPC UA Server and retrieve its available Endpoints. Selecting an Endpoint will populate the Security dropdown with the available User Security Policies for the Endpoint.
Property
Description
Use Variables
Tick to select saved Server Url, User Name, and Password variables; or enter the text manually.
Server Url
The Url of the OPC UA Server to connect to.
Endpoint
The Endpoint of the OPC UA Server to connect to. Each Endpoint follows a different Protocol, Security Mode, Security Policy, and Message Encoding.
Auto Accept Server Certificate
Tick to auto accept the certificate during server authentication.
Security
The authentication options are: 
Anonymous - none
UserName - basic
Certificate - the Agent generates its own Certificate and uses it to authenticate (go to the Litmus Edge portal to configure the certificate as trusted for Litmus Edge OPC UA Server Connections)
User Name
The User Name used to authenticate with the server (applies to UserName Security only).
Password
The Password used to authenticate with the server (applies to UserName Security only).
Specify Branch
When the Connection details are completed, the Agent attempts to authenticate with the Litmus Edge OPC UA Server. If successful, the Address Space of the Server is made available to the Agent, allowing the navigation of Branches.
Property
Description
Branch Navigation
The method used to navigate to the Node where the Tag values are retrieved: 
Using Dot Notation: the branch name and each child branch are separated by a dot.
Using Drill Down: select each level of the branch.
Branch Path
The dot-separated Branch path to the Node where the Tag values are retrieved (applies to Using Dot Notation Branch Navigation only).

A path that is invalid or does not exist will not display any available Tags. 
Do not use dots (.) in the Branch names to ensure the Address Space is traversed correctly.
Level 1 (up to Level 10)
Select the Branch path to the Node where the Tag values are retrieved - limited to 10 Levels (applies to Using Drill Down Branch Navigation only). 
Tags
Once the Branch is provided, the Agent retrieves the available Tags for that Branch. 
Property
Description
Available Tags
The available Tag values for the branch specified.
Add Selected Tags
Tick to add the selected Tags from Available Tags selection to the Tags Grid.
Tags Grid (Tag, Tag Value)
The grid defines the values to be updated:
Tag: The Branch Path of the Tag (including its name) that will be updated.
Tag Value: The column or attribute of the input payload that contains the new value.

Assigning a Tag Value that does not match the Type of that Tag will cause an error on the published data stream e.g., selecting "Double" for text. 
The Action Agent updates the Node's Value only due to a limitation on the Litmus Edge OPC UA Server. The Source and Server Timestamp retain the value from the server.
Endpoints
Name
Description
Input
This endpoint is used to receive data from the parent Agent.
Output
Events received from the parent Agent are processed and made available to this endpoint.
Error
Errors encountered during the execution of this Agent will be published on this endpoint.

Property	Description
Collection	This associates the Agent to a specific Collection (default to that of the current Data Stream).
Polling Interval (seconds)	A timespan to specify how often should the Agent check for new data/changes or update its cache.

Property	Description
Use Variables	Tick to select saved Server Url, User Name, and Password variables; or enter the text manually.
Server Url	The Url of the OPC UA Server to connect to.
Endpoint	The Endpoint of the OPC UA Server to connect to. Each Endpoint follows a different Protocol, Security Mode, Security Policy, and Message Encoding.
Auto Accept Server Certificate	Tick to auto accept the certificate during server authentication.
Security	The authentication options are: Anonymous - none UserName - basic Certificate - the Agent generates its own Certificate and uses it to authenticate (go to the Litmus Edge portal to configure the certificate as trusted for Litmus Edge OPC UA Server Connections)
User Name	The User Name used to authenticate with the server (applies to UserName Security only).
Password	The Password used to authenticate with the server (applies to UserName Security only).

Property	Description
Branch Navigation	The method used to navigate to the Node where the Tag values are retrieved: Using Dot Notation: the branch name and each child branch are separated by a dot. Using Drill Down: select each level of the branch.
Branch Path	The dot-separated Branch path to the Node where the Tag values are retrieved (applies to Using Dot Notation Branch Navigation only). A path that is invalid or does not exist will not display any available Tags. Do not use dots (.) in the Branch names to ensure the Address Space is traversed correctly.
Level 1 (up to Level 10)	Select the Branch path to the Node where the Tag values are retrieved - limited to 10 Levels (applies to Using Drill Down Branch Navigation only).

Property	Description
Available Tags	The available Tag values for the branch specified.
Add Selected Tags	Tick to add the selected Tags from Available Tags selection to the Tags Grid.
Tags Grid (Tag, Tag Value)	The grid defines the values to be updated: Tag: The Branch Path of the Tag (including its name) that will be updated. Tag Value: The column or attribute of the input payload that contains the new value. Assigning a Tag Value that does not match the Type of that Tag will cause an error on the published data stream e.g., selecting "Double" for text.

Name	Description
Input	This endpoint is used to receive data from the parent Agent.
Output	Events received from the parent Agent are processed and made available to this endpoint.
Error	Errors encountered during the execution of this Agent will be published on this endpoint.

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Release Notes

Last modified 9mo ago