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Fig. 2.1.1-5 : Example of DALI topology
2.1.1.7.5 DALI Addressing
The DALI/DSI Master module is used as interface between DALI slaves and
other components in building management applications.
The logical assignment between sensors, control elements and DALI devices
is done by the fieldbus controller or the coupler's higher-level control.
The devices are controlled by individual addresses (short addresses) whereas
individual groups are controlled by group addresses. Controlling all devices at
the same time is made possible by broadcast addressing.
Using DALI, up to 64 short addresses, 16 group addresses and 16 scene light
values can be defined.
Addresses assignement is done using the software so that the system
configuration can be modified without changing the installation.
When activated by the PLC application, the electronic ballasts generate
themselves an coincidental long address of 24 bit. The module searches the
electronic ballast with the lowest long address in the network and assigns to
this the first free short address. This procedure is repeated until all electronic
ballasts are addressed. By the coincidental long addresses also the short
addresses are arranged in coincidental order. Assignement is done using the
addressing commands implemented in the module.
WAGO-I/O-SYSTEM 750
I/O Modules
750-641 [DALI/DSI Master Module]
Installation Notes
• 33
g064103e
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