KNX Configuration Modes Explained

The KNX standard defines multiple configuration modes that determine how devices are commissioned, addressed, and bound together within a KNX installation. These configuration modes provide flexibility for different project sizes, system architectures, and commissioning requirements.

Selecting the appropriate configuration mode impacts how devices are managed, how communication relationships are established, and how much centralized engineering is required during setup and maintenance.

S-Mode (System Mode)

System Mode, commonly referred to as S-Mode, is the most widely used KNX configuration mode for professional installations. It uses the standard KNX frame format and requires active network management performed through ETS.

In S-Mode, devices are configured using both individual addressing and group addressing. ETS is responsible for managing device parameters, bindings, and overall system topology.

Controller Mode

Controller Mode also uses the standard KNX frame format and relies on group communication. Like S-Mode, it requires active network management via ETS and uses broadcast and individual addressing for configuration and operation.

This mode is typically used in systems where a controller plays a central role in coordinating device interactions.

Push Button Mode (PB Mode)

Push Button Mode is designed for simpler installations where configuration is performed directly between devices without the need for a central engineering tool.

In PB Mode, devices rely on direct interaction—often initiated via physical buttons—to establish group communication. It uses the standard KNX frame format with structured binding, making it suitable for small or residential systems.

Logical Tag Extended Mode (LTE)

Logical Tag Extended Mode introduces extended frames for native run-time communication. Instead of relying solely on traditional group addresses, LTE uses tagged binding based on Interface Object properties.

This mode enables more flexible and descriptive communication models, particularly for advanced or evolving KNX applications.