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© Carlo Gavazzi A/S
Car Park Monitor Modes
The unit has four different configurable modes:
Slave Mode
In slave mode the unit can collect data from maximum 120 sensors connected on the L1 bus (seg-
ment)�
Addressing of the sensors is performed with the parking guidance system Configuration unit , GP7380
0080� The number of available parking spaces is transmitted to the L2 bus in order to allow CPMs in
master mode or master indicator mode to read the information� It is possible to have up to 480 slave
CPMs on the L1 bus� All slaves are programmed with a unique ID number�
Roof Mode
Roof mode is designed for the top floor where it is impossible to mount sensors on across the cars�
One sensor detects when a car enters the roof� Another sensor detects when a car is leaving the roof�
The number of available parking spaces is transmitted to the Dupline
®
L2 bus in order to allow parking
guidance system CPMs in master mode or master indicator modes to read the information� Roof
mode allows max� 128 addresses�
Master Mode
This mode is the master mode� Only one master CPM is allowed in the entire system� The master pro-
vides the system with the multiplex signal� It also has the possibility to read and summarize on L2 the
total of available parking spaces transmitted from selected slaves and the roof module (if used)�
Master Indicator Mode
In master Indicator mode the unit is only connected to the Dupline
®
net L2� The master Indicator reads
and totalizes on L2 the number of open parking spaces transmitted from selected slaves and the roof
module (if used)�
The master Indicator mode is e�g� used to summarize the total amount of open spaces on one floor
by adding the numbers from the slaves on the particular floor� All CPMs are identified with a unique
ID number� In master indicator mode, the CPM can be used to monitor a range of specified ID's from
the multiplexer (example ID 50 to 200)� This means that the CPM collects all the open parking spac-
es from ID 50 to ID 200 and sends the information to the Display via RS485� There is no limit to the
amount of master indicators on the L2 bus�
General Installation
Cable
The 3-wire cable used in the Carpark system supplies both Dupline
®
signals and power to the sensors
To avoid voltage drop at the far end of the cable or to avoid reflections in the cable, we require a cable
that meets the following specifications:
3-conductor, 1.5 mm
2
, (14-16AWG), non-shielded, single core.
If multi core cable is used, the cus-
tomer must connect a ferrule on each wire end, because the connections on the sensors are all “push
connectors”�