Industrial Operations

Bella SCADAWeb-based SCADA software

Monitor and control your plant from the browser: real-time SCADA with no client software to install.

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Bella SCADA collects data from PLCs and devices in the field in real time, displays it on screens and securely sends operators' control commands back. There's no client software to install; all operations run in the browser.

Alarm management, historical data, trend charts and reporting live on the same platform. Permission separation and action logs document who changed what and when in critical environments.

Capabilities

Real-time monitoringTag-based live data, status indicators and schematic screens.

Alarm managementPriority, acknowledgement, shelving and history; ISA-18.2 alarm load, flood and chattering indicators.

Historical dataTrend charts, comparisons and export.

Permissions and action logWho issued which command and when — a full audit trail.

ReportingAlarm history, trend and energy consumption reports; Excel/PDF output and scheduled delivery. Shift and downtime analysis on the OEE screen.

Data exportMQTT publishing (UNS and Sparkplug B), a read-only OPC UA server and a REST endpoint with API keys.

AI AssistantAsk questions about plant data from within the panel; the assistant is read-only and uses only data the user is permitted to see.

OEE / MESShift records kept automatically or manually; availability, performance, quality and a downtime-reason Pareto on one screen.

HMI designerOperator screens are drawn in the browser with a toolbox, symbol library, layers and undo/redo, and run in the same place.

Mobile operator viewOn narrow screens a bottom tab bar gives access to dashboard, alarms, live monitoring and trends from a phone.

Recipes and e-signatureProduction recipes are defined and managed from the panel; commands on selected tags require an e-signature and second-person approval.

Tag templates and asset treeEquipment of the same type is replicated from a template (UDT); tags are organized in a site–line–equipment tree.

Data path: from the field to the screen

Field drivers run as a separate service, so reading continues even if the web server restarts. Layers talk over Redis; live data reaches the browser via SignalR.

Field devicePLCs, RTUs, power analyzers, meters and sensors.
Bella RuntimeOne driver per connection; reads with scaling, deadband and quality information. Runs as a Windows service or Docker container.
RedisLive values, connection status and the command channel. The work lock between multiple Runtimes is also kept here.
API and historyAlarm evaluation, calculated tags and scripts; values are batch-written to PostgreSQL (optionally TimescaleDB).
BrowserHMI screens, trends, alarms and reports in a web client that needs no installation.

When something fails

A SCADA system is judged by what it does when things go wrong. We describe how it behaves today, as it is.

If a device connection dropsThe connection moves to an error state and retries after 5 seconds. Screens flag stale data and lost connections.

If the server is unreachableThe Runtime holds values in memory, up to 10,000 messages per connection; when full, the oldest is dropped. There is no disk-backed buffer.

Runtime redundancySeveral Runtimes can run at once. The one holding the work lock reads; if the lock lapses (35 s by default), a standby instance takes over.

Server redundancyAPI nodes elect a primary and support manual hand-over. Full hot standby requires a separate installation on a second machine.

If history cannot be writtenThe write queue holds up to 100,000 samples in memory; dropped samples are counted and logged, never lost silently.

Data retentionNumeric tags are stored at a per-tag logging interval. Default retention is 30 days and configurable; TimescaleDB adds compression and retention policies.

Alarms, access and audit trail

Alarm rulesThreshold, hysteresis, on and off delay, priority group. Acknowledge and timed shelving are supported.

Alarm notificationIn-app, email, Telegram, SMS gateway and webhook. During an alarm flood a summary is sent instead of individual messages.

Access controlPermission-based access, by role and by screen. Two-factor authentication with an app (TOTP); after 5 failed logins the account is locked for 15 minutes.

Command safetyWrite permission, writable-tag and data-type checks. Single or dual (second-person) e-signature on selected tags, with password re-entry.

Audit trailEvery record change and every command is logged with user, IP and value. Entries are linked by a SHA-256 chain; the chain can be verified and deletions become visible.

Installation and backupOn-premise on Windows Server (IIS + Windows service) or Docker. Configuration exports and imports as JSON; database backup and restore drills are documented.

Protocol support

Drivers live inside the Runtime; for a device not on the list, a driver is written as part of the project.

Modbus: Modbus TCP, Modbus RTU (serial) and Modbus RTU over TCP.
OPC UA: Connects as a client; username/password or anonymous session, signed and encrypted security modes.
PLC and field protocols: Siemens S7, EtherNet/IP, MQTT.
Energy and utility protocols: IEC 60870-5-104, DNP3, IEC 61850 (MMS), BACnet/IP.
Publishing data out: MQTT (UNS and Sparkplug B), a read-only OPC UA server and a REST endpoint secured with API keys.

Every driver is verified together with the on-site device during commissioning.

Case studies

Clients

Bella SCADA + kioskManufacturingDowntime reasons are no longer guessed at shift end — they are entered on the spotA system where operators start work orders and enter downtime reasons and scrap on touch kiosks at each machine, and these entries are combined with SCADA machine data into live efficiency (OEE).Read the case study Bella SCADATest systemsRebuilt transmissions are now delivered with measurementsTest software that runs a rebuilt transmission on the test bench, measures torque, speed, temperature, gear pressures, retarder temperature and retarder speed, and stores the result in a report tied to the serial number. Before this system the company had no test setup that could take measurements.Read the case study

Screenshots

Bella SCADA — Trend comparison — Trend comparison

Bella SCADA — ISA-18.2 alarm performance — ISA-18.2 alarm performance

Bella SCADA — OEE and shift records — OEE and shift records

Bella SCADA — HMI designer — HMI designer

Frequently asked

Do we need to replace our existing PLCs?

Usually not. Bella SCADA connects to existing PLCs and devices over OPC UA, Modbus TCP/RTU and MQTT.

Is any installation needed on operator PCs?

No. There's no client software to install; monitoring and control run in the browser.

Can we trace who issued which command?

Yes. Role separation and operation logs keep a full audit trail of who issued which command and when.

Is data lost if the connection drops?

Not during short outages: while the Runtime cannot reach the server it holds the values it reads in memory, up to 10,000 messages per connection. The buffer is not written to disk; if the Runtime restarts in the meantime, pending values are lost. We account for this openly in the design.

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What can Bella SCADA do for you?

Let's plan the whole process together, from installation to integration.

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