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Maintenance and troubleshooting
DALI Manual | 08-2013 | en
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Double addressing problem at set-up
In rare cases more than one DALI device may have the same short address. If a DALI command is sent to such a short
address the devices will react simultaneously. It will not be possible to address just one device; all the devices with the
same short address will always react together. It will not be possible to get the correct response from these devices.
What can cause double addressing problems?
After addressing, the number of addressed devices is shown. This number (DALI short addresses) must be the same
as the number of connected devices. If there are fewer addresses than connected devices the DALI circuit must be
re-addressed.
masterCONFIGURATOR provides a way of identifying any double addressing problems. It shows if a device does not
send back a clear response. Unknown devices or false device information also indicate double addressing or a faulty
device.
If double addressing has occurred the DALI circuit must be readdressed (select the option “new installation”). This
action deletes all existing addressed and reassigns them.
...
The problem may occur very rarely as a result of the normal addressing algorithm.
DALI lines that have already been addressed are connected to one another.
A faulty DALI device is replaced with a device that has already been addressed.