Litmus OPC Fusion

9 min

Connect your legacy OPC DA systems to Litmus Edge

Prerequisites

Windows 7 or later

At least one OPC DA server installed and running (e.g., Kepware, Matrikon, RSLinx)

Network access to target OPC DA servers

Administrator privileges for installation

Litmus Edge instance for final integration (optional for initial testing)

Step 1: Install OPC Fusion

Download the OPC Fusion installer from the Central Portal.

Run OPCFusionSetup.exe as Administrator.

Accept the license agreement.

Choose installation directory (default: C:\Program Files\Litmus\OPC Fusion).

Select the components to install.

Verify the ports and modify as needed.

Click Install.

Wait for installation to complete.

Click Finish.

Step 2: Start the Service

The OPC Fusion service starts automatically after installation if selected on the last page. Verify it's running or start it by:

Option A: System Tray

Look for the OPC Fusion icon in the system tray

Icon should be green (running)

Right click on the icon and select Start Service if not running.

Option B: Services Console

Open Windows Services (services.msc)

Find "Litmus OPC Fusion Gateway"

Status should show "Running"

Right click on the service and choose Start if not running.

Step 3: Access the Web UI

Open your web browser

Navigate to: http://localhost:8443

Username: admin

Password: litmusfusion

Important: Change the default password immediately after first login!

Step 4: Add an OPC DA Server

Click OPC DA > DA Clients in the sidebar

Local servers should automatically be displayed in the Discover tab. If the server is listed then click the + Add button and proceed to step 5.

If need you can add a server manually by selecting the Servers tab clicking + Add Manually

Fill in the connection details:

Name: A friendly name (e.g., "Kepware Server")

ProgID: The OPC server's ProgID (e.g., "Kepware.KEPServerEX.V6")

Hostname: localhost for local, or IP/hostname for remote

Update Rate: 1000 ms (default)

Click Create

The server status should change from "Connecting..." to "Connected" within a few seconds.

Step 5: Create Tag Mappings

Click the Browse Tags tab.

Select your DA server from the dropdown.

Click Connect to explore the server's address space.

Select a tag and click Add.

Repeat for additional tags.

Click Add X Tags to Mappings when complete.

Step 6: Test OPC UA Output

Before connecting Litmus Edge, verify OPC Fusion is working with a test OPC UA client:

OPC Fusion Endpoint:

Endpoint URL: opc.tcp://localhost:4840

Security Mode: None (for initial testing)

Namespace: ns=2 (default for mapped tags)

Test Clients:

UaExpert (Unified Automation) - Recommended for testing

Prosys OPC UA Browser

Step 7: Connect Litmus Edge

Now connect Litmus Edge to OPC Fusion to bring your legacy DA data into the Litmus Edge platform:

Navigate to DeviceHub > Devices

Click + Add Device

Select OPC UA Client Advanced driver

Configure the connection:

Name: OPC Fusion Gateway

Driver Mode: Subscription

Server URL: opc.tcp://<opc-fusion-host>:4840

Security Policy: None (Not recommended for production*)

Security Mode: None (Not recommended for production*)

Click Create Device

Browse OPC Fusion's address space and select tags to import

Your legacy OPC DA data is now flowing into Litmus Edge!

*For production it is best to use secure communication and setup certificates

Step 7: Monitor Operation

In the sidebar visit:

Dashboard to see system overview

Click Tags > Monitoring to view real-time tag values

Click System > Streaming Logs to see operational logs

Troubleshooting Quick Reference

Problem	Solution
Service won't start	Check Windows Event Log, run as Administrator
DA server shows "Disconnected"	Verify ProgID, check DCOM settings
Can't access Web UI	Verify port 8443 is not in use
UA client can't connect	Check firewall for port 4840
Tags not updating	Verify DA subscription active, check update rate

For detailed troubleshooting, see Troubleshooting Guide.

Congratulations! You've successfully set up OPC Fusion.