WinCC REST API
The is a modern interface introduced to simplify data exchange between Siemens WinCC SCADA systems and external IT applications like Python, web apps, or MES/ERP systems. Core Features
1. Custom React Dashboard for Plant Managers
A REST (Representational State of Resource) API is an architectural style for designing networked applications. It's based on the idea of resources, which are identified by URIs (Uniform Resource Identifiers), and can be manipulated using a fixed set of operations. REST APIs typically use HTTP (Hypertext Transfer Protocol) as the communication protocol and return data in a format like JSON (JavaScript Object Notation) or XML (Extensible Markup Language).
Further reading
- Technology: The next-generation SCADA based on web technologies (Web Client, Node.js backend elements).
- Implementation: Native REST connectivity is a core pillar of the architecture.
- Target: Greenfield projects and highly integrated IIoT (Industrial Internet of Things) applications.
- Polling Rate: Do not poll faster than once per 100ms (10 Hz) for a single tag. For 100 tags, once per second is safer.
- Connection Limit: The WinCC REST API service (usually hosted in IIS or the WinCC WebService host) has a default concurrent connection limit of ~20.
- Alternative for High-Speed Data: Use WinCC’s native OPC UA server for 1ms resolution. REST is for operational intelligence, not deterministic control.
REST Service (Inbound)
: External apps call WinCC to request or update data.
Is the WinCC REST API the final answer? Not exactly. Each protocol has a role:
5. Acknowledge an Alarm
Wincc Rest Api May 2026
WinCC REST API
The is a modern interface introduced to simplify data exchange between Siemens WinCC SCADA systems and external IT applications like Python, web apps, or MES/ERP systems. Core Features
1. Custom React Dashboard for Plant Managers
A REST (Representational State of Resource) API is an architectural style for designing networked applications. It's based on the idea of resources, which are identified by URIs (Uniform Resource Identifiers), and can be manipulated using a fixed set of operations. REST APIs typically use HTTP (Hypertext Transfer Protocol) as the communication protocol and return data in a format like JSON (JavaScript Object Notation) or XML (Extensible Markup Language). wincc rest api
Further reading
- Technology: The next-generation SCADA based on web technologies (Web Client, Node.js backend elements).
- Implementation: Native REST connectivity is a core pillar of the architecture.
- Target: Greenfield projects and highly integrated IIoT (Industrial Internet of Things) applications.
- Polling Rate: Do not poll faster than once per 100ms (10 Hz) for a single tag. For 100 tags, once per second is safer.
- Connection Limit: The WinCC REST API service (usually hosted in IIS or the WinCC WebService host) has a default concurrent connection limit of ~20.
- Alternative for High-Speed Data: Use WinCC’s native OPC UA server for 1ms resolution. REST is for operational intelligence, not deterministic control.
REST Service (Inbound)
: External apps call WinCC to request or update data. WinCC REST API The is a modern interface
Is the WinCC REST API the final answer? Not exactly. Each protocol has a role: Polling Rate: Do not poll faster than once
5. Acknowledge an Alarm
