Wincc Rest Api ⭐

Technical Write-Up: WinCC REST API

1. Introduction

The WinCC REST API is a modern web service interface introduced in SIMATIC WinCC Professional (TIA Portal) and WinCC Unified (the latest generation of Siemens’ HMI/SCADA system). It allows external clients (e.g., web dashboards, MES, ERP, third-party applications, or custom scripts) to interact with WinCC runtime data over standard HTTP/HTTPS protocols.

headers = "Authorization": f"Bearer token" alarms = requests.get(f"url/alarms/current", headers=headers, verify=False) wincc rest api

• Platform Independence: The API is based on standard HTTP and JSON, making it accessible from various programming languages and platforms.
• Flexible Data Access: The API provides direct access to process data, allowing for efficient data exchange and reducing the need for proprietary interfaces.
• Improved Integration: Enables seamless integration with other systems, such as MES (Manufacturing Execution Systems), ERP (Enterprise Resource Planning), and SCADA (Supervisory Control and Data Acquisition) systems.
• Automation and Scripting: Allows for automation of tasks, such as data export, report generation, and alarm processing.

Alarm and Message Management: External systems can access runtime messages and historical alarms, allowing for the integration of SCADA notifications into enterprise-level alerting platforms. Technical Write-Up: WinCC REST API 1

Have you implemented WinCC REST API in a real project? What challenges did you face? Share your experience in the comments below! Platform Independence : The API is based on

: Alex integrated a 3rd-party weather service into his SCADA screens. By using the WinCC REST Connector

write_url = f"wincc_host/WinCCUnified/WriteTagValue"

"TagNames": ["Tank_Level", "Pump_Status", "Temperature"]

Industrial IoT Integration: Often used to build pipelines for AI agents (e.g., predictive maintenance or anomaly detection) by moving data from WinCC to Python or SQL environments. Components & Tools