Roboflow + Kepware Server
Write detections, counts and pass or fail results into Kepware Server tags over OPC UA, so every device and client connected to Kepware can use them.
How to connect Kepware Server to Roboflow
6 stepsSet up an edge device
Run your Workflows on a device managed by Deployment Manager, or on a self-hosted Inference server with enterprise blocks, on a network that can reach the Kepware host. Open port 49320 in the host's firewall.
Enable a remote OPC UA endpoint
In the OPC UA Configuration Manager, open Server Endpoints and enable an endpoint on a network adapter the edge device can reach. The endpoint created at install accepts local connections only.
Create a user for Roboflow
In the User Manager, add a user in a group with write access to the tags Roboflow will update. Anonymous OPC UA login is turned off by default, so the block logs in with this user.
Pick the tags to write
Add or choose the tags the Workflow will write, under the channel and device they belong to, with data types that match the values you will send.
Add an OPC UA Writer Sink for each tag
In the Workflow, add one OPC UA Writer Sink per tag. Enter Kepware's endpoint URL, the Kepware user name and password, the namespace and the tag's path (channel, device and tag name), and a value type that matches the tag.
Check the values in Kepware
Run the Workflow and watch the tag in Kepware's OPC Quick Client. The block's error status output shows whether each write succeeded.
What teams build with Kepware Server
Send a reject signal to any connected PLC
Write a reject flag to a device tag and let Kepware deliver it to the PLC through the driver it already uses.
Share results with every Kepware client
Make inspection results available to the SCADA, historian and MES systems that already read from Kepware.
Count output per shift
Write running counts of good and rejected parts to tags that dashboards and reports already pull from.
Questions
No. Kepware's drivers handle the device protocol. Roboflow only speaks OPC UA to Kepware.
An OPC UA endpoint the edge device can reach, a user with write access to the tags, and the tags themselves. Anonymous login is off by default, so the block needs that user's name and password.
Yes. PTC renamed KEPServerEX to Kepware Server with version 7.0, and KEPServerEX 6 projects carry over to the new version.
No. The OPC UA Writer Sink runs on your own device or self-hosted Inference server, which needs a network route to Kepware Server.
The OPC UA Writer Sink is part of the Enterprise plan. Talk to our team to add it to your workspace.
Why are companies choosing Roboflow?
The end-to-end platform for vision AI: create datasets, train models and deploy to production.
Flexible deployment modes
Move from a scalable cloud API to edge hardware like NVIDIA Jetson without managing complex dependencies.
Integrated workflow builder
Combine multiple AI models, custom business logic and third-party integrations into one production-ready pipeline in a low-code editor.
Model monitoring and alerts
Dashboards track confidence, inference time and request volume for your deployed models, and email alerts tell your team when confidence suddenly drops.
