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.

Part 252 – Energy reporting

Part 252 describes additional memory banks in which energy and consumption data can be read.

Memory bank 202 contains information about active energy and active power. This information is obligatory and is provided by DALI control gears that support Part 252.

Memory bank 203 contains information on apparent energy and apparent power.

Memory bank 204 contains information on output energy and output power.

The information from memory banks 203 and 204 is optional and does not need to be provided by DALI control gears that support Part 252.

The values in Part 252 are read-only.

The entire contents of memory banks 202, 203 and 204 are read via the function block FB_DALI102ReadMemoryBank.

Part 252 also provides the function blocks described below for reading the individual parameters. The actual value of the read parameter is calculated from the read output value and the scaling factor. The function blocks output both values for further calculation.