Key Takeaways
- Local server SCADA: SCADA runs on a server inside the facility.
- Operators connect via browser on the plant network; data stays local.
- Closed-network security plus web SCADA flexibility.
- Suited to critical processes, OT security and public infrastructure.
- Docker simplifies installation and version management.
The biggest advantage of web SCADA is browser access. But many facilities do not want to expose their SCADA to the internet. Web SCADA running on a local server combines both needs: a modern web interface with closed-network security.
What Is Local Server SCADA?
It means the SCADA software runs on a server inside the facility. Operators connect with a browser from any computer on the plant network. Control commands and data stay on the local network.
Classic SCADA, Cloud SCADA and Local Web SCADA
| Criterion | Classic SCADA | Cloud Web SCADA | Local Web SCADA |
|---|---|---|---|
| Interface | Installed client | Browser | Browser |
| Runs on | Plant server | Cloud | Plant server |
| Internet | Not required | Required | Not required |
| Client licence | Usually per screen | None | None |
| Screen editing | Often the integrator | User | User |
Local web SCADA keeps the closed-network security of classic SCADA while bringing the flexibility of web SCADA.
Which Facilities Should Choose Local SCADA?
- Critical process control: Sites where control commands must not travel over the internet.
- OT security policy: Factories that isolate the production network from the outside world.
- Pump stations, treatment and water plants: Public infrastructure with a local control room.
- Sites with weak connectivity: Monitoring must not stop when the internet drops.
What to Watch During Deployment
- 1Network segmentation: The SCADA server should sit on the OT network, separated from the office network.
- 2Protocol compatibility: It should connect to existing PLCs via Modbus RTU/TCP and OPC UA.
- 3Authorisation: Users who can send commands should be limited by role.
- 4Backup: Historical data and screen designs should be backed up regularly.
- 5Container-based deployment: Docker simplifies installation and version management.
Web SCADA on a Local Server with SolarTools
SolarTools can now run on your facility's server with Docker. Active and passive SCADA screens, single-line diagrams, alarms and remote setpoint management on your local network, in the browser. You build the screens yourself without waiting for an integrator. Talk to our sales team about on-premise deployment.
Frequently Asked Questions
What is local server SCADA?
It means the SCADA software runs on a server inside the facility instead of the cloud. Operators connect with a browser from a computer on the local network; control commands and data stay on the plant network.
Does web SCADA work without internet?
Web SCADA installed on a local server works inside the plant network without internet. Browser access happens only over the local network.
What is the difference between local web SCADA and classic SCADA?
Both run on a plant server. Local web SCADA needs no client installation, opens in the browser and lets users edit screens without depending on an integrator.
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