Tables

Online Table

The Online Table is designed for real-time monitoring of live system variables. Unlike Basic or Editable Tables, it does not connect to a SQL database. Instead, it streams values directly from a running CODESYS controller.

This makes the Online Table ideal for scenarios where up-to-date process values, status feedback, or live sensor readings must be continuously observed in the visualization layer.

Supported data types include:

• BOOL, INT, DINT, REAL, STRING (from CODESYS variables)
• Arrays and structured fields (e.g. tables of sensor states)

Important:
The Online Table is read-only – users cannot write or change values here. It is purely for display purposes.

Like all table types, it adheres to the permission model (Read, Insert, Update, Delete) — but in this case, only Read is functionally relevant.

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Key Features

• Live connection to CODESYS – no intermediate database layer
• Real-time data streaming – shows current system states without delay
• Read-only by design – used solely for monitoring
• Supports arrays and structures – ideal for lists of channels, devices, I/Os
• Visual formatting options – conditional colors, value icons, alignment
• Cyclic or event-based update – based on polling or subscription
• Unified permission model – Read access is respected per user or role