Beckhoff KL6811, Documentation

Page: 53 / 60

Appendix
KL6811 53 Version: 2.0.0
7 Appendix
7.1 DALI commands
In accordance with the DIN EN 60929 [ } 56] standard, addresses and commands are transmitted as
numbers with a length of two bytes.
These commands take the form YAAA AAAS xxxx xxxx. Each letter here stands for one bit.
• Y: type of address
0
bin
: Short address
1
bin
: group address or collective call
• A: significant address bit
• S: selection bit (specifies the significance of the following eight bits):
0
bin
: the 8 xxxx xxxx bits contain a value for direct control of the lamp power
1
bin
: The 8 xxxx xxxx bits contain a command number.
x: a bit in the lamp power or in the command number
Direct DALI commands for lamp power
These commands take the form YAAA AAA 0 xxxx xxxx.
xxxx xxxx: the value representing the lamp power is transmitted in these 8 bits. It is calculated according to
this formula:
253 values from 1
dec
to 254
dec
are available for transmission in accordance with this formula.
There are also 2 direct DALI commands with special meanings:
Command Command no. Description Answer
00
hex
0
dec
The DALI device dims using the current fade time down to the parameterized MIN value,
and then switches off. -
FF
hex
254
dec
Mask (no change): this value is ignored in what follows, and is therefore not loaded into
memory. -
Indirect DALI commands for lamp power
These commands take the form YAAA AAA 1 xxxx xxxx.
xxxx xxxx: These 8 bits transfer the command number. The available command numbers are listed and
explained in the following tables in hexadecimal and decimal formats.