Technical Manual Presence Detector SCN-P/G360XX.02
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4.2.9 Master/Slave Operation
4.2.9.1 Light channel
In larger rooms the use of a single motion detector is often not sufficient. To detect movement in
every corner of the room, several detectors have to be used across the entire room. Here, however,
a detected movement should always lead to the same settings regardless of the corner of the room
in which the presence was detected. For this purpose, one detector is switched as master and any
number of others as slave
The settings for master/slave control are made in the "Light channel 1-4" menu.
To achieve this, the slaves have to be set as follows:
Setting to fully automatic (so that the movement is always sent)
Set follow-up time to the same value as the Master
Set object type for light to switching
Activate cyclical sending for the output object
o
Parameters: Output object 1 sends cyclically at ON
o
Standard value: 1min; with longer follow-up times, e.g. at 15min, cyclic sending can
be increased to 5 min, for example, in order to reduce the bus load
Set the "Switch-on threshold" parameter to maximum (independently of brightness)
(This setting has to be done in the menu "General Settings")
The master is parameterised to fully- or half automatic, as desired.
A value of 10 minutes is recommended as the common follow-up time.
The objects have to be connected as follows:
The corresponding output objects of the slaves (objects 0, 10, 20, 30, 40, 50) have to be
connected to object 5 "External motion (slave)" of the master..
The master now evaluates each self-detected movement as well as movement detected by the slaves.
The master then switches the light groups according to its own settings, regardless of who has
detected the movement.
4.2.9.2 HCV/Alarm
The master/slave circuit can also be used with the HCV/alarm channels. The settings for the slave are
the same as for the slaves of the light groups. However, the settings for the brightness values are
omitted for the HVAC/alarm channel. The observation windows can be set according to individual
requirements.
The objects have to be connected as follows:
All output objects of the slaves - object 40 (HCV) or object 50 (alarm) have to be connected
to the external motion object (object 45) of the master.
Attention
: As long as the slave is in its follow-up time, it cyclically sends a "1" to the master. After the
last "1" sent to the master, the master's follow-up time expires before it switches off its output. In
this case, the follow-up time from master and slave is added.