1.2. Architecture

The architecture of the runtime system CODESYS Control V3 based on a component oriented model. Each logical, functional part of the runtime system is separated in one (or more) components.

Each component has a well-defined interface. Via this interface, other components can have access to this component. Because a component has a specified interface, it can be replaced by another component that implements this interface.

Additionally a component can have a dependency to other components, if this component uses their interfaces to operate.

Because of this component model, components can be arranged together to a complete runtime system. This runtime system can be a very small one with less functionality or a full ranged runtime system with all features! This depends only on the number and kind of components that are arranged together.

Most of the components are system and processor independent and they can run on small 16-Bit up to powerful 32-Bit systems. This is realized by a “single-source” of the runtime system.

• 1.2.1. Overview
• 1.2.2. Technology: ANSI-C and C++
• 1.2.3. Error Codes
• 1.2.4. Object Handles
• 1.2.5. Linkage
• 1.2.6. Component Interface Architecture
• 1.2.7. M4 Mechanism
• 1.2.8. Source Tree of the Runtime System
• 1.2.9. Files on the Target System
• 1.2.10. Embedded runtime