Introduction

In specifications that go beyond the current DALI-2 standard, the DALI Alliance (DiiA) describes additional DALI parts for the operation of intelligent luminaires.

These new parts are combined under the term D4i.

The current Tc3_DALI library supports Parts 251 (DT50), 252 (DT51) and 253 (DT52).

These parts contain functions that can be forwarded to the higher-level DALI network for evaluation and control.

They describe the location, type and format of the data in the memory banks of the DALI control gears. In addition, they describe the exchange of data with DALI control devices.

DALI Part 251 – memory bank 1 extension

Part 251 extends previously unoccupied areas of memory bank 1 for vendor-specific information. This information does not change the functionality of the control gear.

The data stored here are directly available to the DALI network for technical management, e.g. in large properties.

Part 251 provides information about the inventory, such as device number, date of manufacture and color of the device. Information on rated power, rated illuminance, rated voltage, minimum power consumption, color rendering index and correlated color temperature are also available.

The values in Part 251 are read-only.

The entire contents of memory bank 1 are read via the function block FB_DALI102ReadMemoryBank.

Part 251 also provides the function blocks described below for reading the individual parameters.