IO Field with Error Value | Custom Web Control | WinCC Unified & V8

Custom Web Control

About IO Field with Error Value

IO Field with Error Value is a Custom Web Control built for industrial SCADA and HMI applications. A WinCC Unified numeric IO field clone bound to a process tag. When the value matches a configurable error value within a tolerance, it replaces the number with a red cross and a custom error text, dims the field and blocks editing. Supports Output, Input and InputOutput modes with range validation and comma or dot decimal input. Simply import it into your WinCC Unified or WinCC V8 project and bind its properties to PLC tags — no web development required.

What You Can Configure

This control provides 18 configurable properties, 1 interactive events, and 2 callable methods. Operators can adjust numeric values for real-time data display, colors to reflect operational states. All parameters are directly bindable to PLC tags for seamless real-time updates.

Compatibility

Works with WinCC Unified (TIA Portal) and WinCC V8. Includes full documentation (PDF & ODT) with installation instructions for both platforms.

💡 TIA Portal Reminder: Remember to uncheck the "Read only" option in TIA Portal when linking a tag to a property that needs to be written from the Custom Web Control. If you don't, the CWC will only be able to read the HMI tags and not write to them.

⚠️ AI-Generated: This control was automatically generated using AI. Please test and validate before deploying in production environments.

⚠️ AI-Generated: This custom web control was automatically generated using AI technology. It may contain errors or unexpected behavior. Users are responsible for testing and validating before using in production environments.

## Current version: v1 (2026-10-26)