Connect any OPC UA server to a live cloud SCADA dashboard. Browse node namespaces, configure subscriptions, set alarms and view historical trends — all from your browser, no on-premise server needed.
No credit card · Any OPC UA server · OPC UA + Modbus in same platform
OPC UA (Unified Architecture) is the modern standard for secure, platform-independent data exchange between industrial devices and software. Unlike older OPC Classic (DCOM-based), OPC UA works across Windows, Linux, and embedded platforms — and over any network, including the internet with TLS encryption.
OPC UA SCADA software connects to OPC UA servers embedded in PLCs (Siemens S7-1500, Beckhoff TwinCAT, Allen-Bradley ControlLogix), DCS controllers, industrial gateways, and manufacturing execution systems. Instead of polling Modbus registers, it subscribes to OPC UA nodes — the server pushes updates when values change, reducing network load and giving sub-second data refresh on live dashboards.
SCADA Cloud's OPC UA integration includes a namespace browser so you can navigate the PLC's data model visually, select the nodes you want to monitor, and have them appear as named tags on your dashboard immediately — no manual NodeId configuration required.
Purpose-built for OPC UA industrial monitoring
Connect to Siemens S7-1500, Beckhoff TwinCAT, Allen-Bradley PLCs, Schneider EcoStruxure, Ignition OPC UA, Kepware, and any other OPC UA-compliant server — vendor-neutral by design.
Navigate the server's node tree graphically — Objects, Variables, Methods. Select nodes to monitor with a click. Tags are created automatically with the node's display name, no NodeId typing required.
Subscribe to OPC UA nodes at your chosen sampling interval (100ms–60s). The server pushes updates only when values change — far more efficient than constant polling for thousands of tags.
Supports None, Basic128Rsa15, Basic256, and Basic256Sha256 security policies. Upload server and client certificates for mutual authentication. TLS 1.2/1.3 transport security included.
Set threshold alarms on any OPC UA tag. Receive email or SMS alerts when process values exceed limits. Full alarm history with operator acknowledgement and escalation log.
All OPC UA tag values are timestamped and stored in the cloud historian. View trend charts, export data to CSV, and query any historical period — months of data available instantly.
Where OPC UA SCADA delivers the most value
Siemens S7-1500 and Beckhoff TwinCAT PLCs ship with built-in OPC UA servers. Connect SCADA Cloud directly — no Modbus gateway or Kepware license required. Get live production data from the PLC's native interface.
Factory floors with Siemens, Allen-Bradley, Mitsubishi, and Schneider equipment can all speak OPC UA. SCADA Cloud connects to every vendor's server with the same workflow — one SCADA for the entire plant.
OEMs embed an OPC UA server in their machine and let customers connect SCADA Cloud without exposing internal PLC code. The customer sees process values and alarms; the OEM's IP stays protected.
OPC UA over TLS works securely over the internet without VPN. Remote plants with an OPC UA server can push data to SCADA Cloud directly — ideal for distributed manufacturing and multi-site monitoring.
Pull real-time production counts, cycle times, and machine status from OPC UA-enabled machines. Feed that data into MES dashboards or ERP via the SCADA Cloud REST API — no middleware required.
Lab equipment with OPC UA interfaces (test benches, environmental chambers, material testing machines) feeds live measurement data directly to SCADA Cloud dashboards and archives for traceability.
Add your OPC UA server endpoint URL — e.g., opc.tcp://192.168.1.10:4840. Select security policy and mode, upload certificates if required. SCADA Cloud connects and confirms the session.
Use the namespace browser to navigate the server's node tree. Click on Variable nodes to add them as SCADA tags. Set the sampling interval (e.g., 500ms) and deadband filter to control update frequency.
Drag OPC UA tags onto dashboard panels — gauges, trend charts, data tables, status indicators. Configure high/low alarms with email notifications and enable automatic historical logging for compliance and analysis.
SCADA Cloud supports the full OPC UA security specification
| Security Mode | Encryption | Authentication | Recommended For |
|---|---|---|---|
| None | None | Anonymous | Local lab testing only — not for production |
| Sign | None | Certificate-signed messages | Trusted LAN environments, message integrity required |
| SignAndEncrypt (Basic256Sha256) | AES-256 | Mutual certificate + optional username | Production deployments, internet-facing connections |
Both OPC UA and Modbus are widely used for industrial data acquisition. Modbus is the simpler, more universal choice — almost every industrial device made in the past 40 years speaks Modbus. If your devices are PLCs, energy meters, VFDs, or sensors with Modbus registers, the Modbus TCP SCADA path is usually quicker to set up.
OPC UA is the right choice when your PLCs natively speak OPC UA (Siemens S7-1500, Beckhoff, modern Allen-Bradley), when you need transport-level security (TLS), or when the device exposes a rich data model you want to browse rather than manually entering register addresses.
SCADA Cloud supports both in the same platform. Before connecting hardware, use the Modbus Slave Simulator to validate Modbus register maps, or the Modbus TCP Simulator to test your SCADA configuration. For an overview of Modbus SCADA, see the Modbus SCADA platform page.
OPC UA SCADA software connects to an OPC UA server — embedded in a PLC, DCS, or industrial gateway — and reads process data using the OPC Unified Architecture protocol. It uses a subscription model so the server pushes updates when values change rather than requiring constant polling. The SCADA displays live values in dashboards, triggers alarms on thresholds, and logs historical data. Because OPC UA is vendor-neutral, the same SCADA connects to Siemens, Beckhoff, Allen-Bradley, and Schneider controllers without separate adapters.
Yes. SCADA Cloud supports OPC UA security modes: None (anonymous, for development), Basic128Rsa15, Basic256, and Basic256Sha256. You can upload the OPC UA server certificate and configure the client certificate for mutual authentication. For most industrial deployments, Basic256Sha256 with certificate exchange is the recommended mode. Anonymous mode is available for lab testing and local development environments.
Yes. SCADA Cloud includes an integrated OPC UA namespace browser. After connecting to a server, navigate the node tree — Objects, Variables, Methods — and select the nodes you want to monitor. Selected nodes become named SCADA tags automatically, eliminating manual NodeId entry. This makes it straightforward to map a PLC's data model to dashboard tags without knowing the full NodeId schema.
Yes. SCADA Cloud supports OPC UA, Modbus TCP, Modbus RTU, and MQTT simultaneously. A single dashboard can display tags from an OPC UA-capable Siemens S7-1500, Modbus energy meters on the same network, and MQTT sensors from IoT gateways — all in one view. This eliminates the need for protocol gateways or separate SCADA systems for different device types on the same plant floor.
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No credit card · Any OPC UA server · Full features for 60 days
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