B&R Industries X20 System, User Manual

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X20 system modules • X20 electronics module communication • X20CS1013
1530 X20 system User's Manual 3.10
4.18.4.7.4.8 Addressing within a DALI network
Name:
Dali_Command
This register provides the module with the command for the addressed receiver(s) in the DALI network.
Data type Value Information
USINT 0 to 255 DALI or slave-specific command
4.18.4.7.5 Using the DALI register address and commands
4.18.4.7.5.1 General
The DALI standard involves two different command types. Direct commands control the brightness of the lights on
the DALI slave being addressed. This type of communication runs only from the master to the slave.
Setting the LSB in the address register will use the included command for independent digital communication. The
commands are also transferred from the master to the slave. Some requests require a response from the slave.
In this case, communication from the slave to the master must also be possible.
4.18.4.7.5.2 Direct DALI commands (ARC)
These commands can be used to directly set the brightness of each DALI slave. The statements 1 to 254 corre-
spond to a brightness of the connected DALI slave based on the following formula:
P = 10
Value - 1
253 / 3
*
P
1000
max
Command 0 can also be transmitted to switch off a DALI slave. In this case, the brightness decreases slowly at
first and then shuts off when a critical power level is crossed.
Command 255 serves as an internal mask value. It is not applied by the DALI slave, which means it has no effect
on its behavior.
4.18.4.7.5.3 Indirect DALI commands
Indirect commands make digital communication possible on the DALI network. In addition to the commands defined
in the DALI standard, some manufacturers of DALI slaves also define their own commands.
Information:
Some indirect DALI commands must be repeated within 100 ms. The X20CS1013 does not evaluate
specified addresses and commands, which means this repetition must be ensured by the application.
Selected standardized DALI commands
Source: EN 62386-102:2009
Code (dec.) Function Response
Indirect control commands
0 Switches off the light immediately
– No smooth transition
1 200 ms dimming up
– Possible to configure the dimming speed separately
– No further change once maximum is reached
– Command ignored when light is off
2 200 ms dimming down
– Possible to configure the dimming speed separately
– No further change once minimum is reached
– Command does not turn light off
3 Increases the brightness by one step
– No smooth transition
– No further change once maximum is reached
– Command ignored when light is off
4 Decreases the brightness by one step
– No smooth transition
– No further change once minimum is reached
– Command does not turn light off
5 Maximum brightness
– No smooth transition
– Turns the light on