The Individual Address of a KNX device is used to switch electrical loads on and off.

False. The Individual Address (in the form area.line.device, e.g. 1.1.42) identifies a device uniquely on the bus and is used by ETS for commissioning, diagnostics and routing through couplers — but never for functional communication at runtime. Switching loads on and off is done through Group Addresses, which link sensors to actuators by function regardless of where they sit in the topology.

Keep a clear mental model: Individual Address = 'who I am' (for the tool), Group Address = 'what I do' (for the application). Mixing the two up is the most common addressing mistake of newcomers.