30
© Carlo Gavazzi A/S
One master module, driving one segment of the basic Dupline
®
fieldbus, can manage up to 128
addresses - which basically means 128 signals - because each signal in this segment needs to be
assigned an address� In the parking guidance system, however, 8 of these addresses are reserved, so
that 120 sensors is the maximum in one segment� The addresses are named by a combination of a
letter and a number� The letter indicates the group (A ��� P), and within each group there are 8
addresses indicated by a number� So, the 128 addresses have the following names: A1, A2, A3,
A4…��A8, B1, B2…��B8, C1…P8�
Dupline
®
Extra Features
The wide range of Dupline
®
products for building and industrial applications are fully compatible with
the parking guidance system making it possible to extend the functionality to include e�g� control of
lighting and ventilation based on presence of persons, CO2 levels and time of the day� Yet another
option is to record the energy consumption in power distribution panels throughout the building in a
central place using energy-meters directly connected to the bus�
System Description
In this chapter you will get an overview of the structure of the parking guidance system� There is a
short description of the basic elements of the system, followed by a description of the structure of
a system segment� Then is described how the individual segments can be linked together to create
a large parking guidance system with thousands of potential spaces� Also, the network structure
required to link the system to a PC with the Parking Guidance software installed is defined� Finally, the
sensor calibration, sensor operation modes, and CPM operation modes are described�
Basic Modules
Parking Guidance System Sensors
With built-in LED indicator light, (red–green)
GP 6220 2201 724
With built-in LED indicator light, (red–blue)
GP 6220 2202 724
Without indicator light
GP 6240 2224 724
New products
With built-in LED indicator light, (Red–Green-Amber) GP 6220 3301 724
With built in LED indicator light, (Red–Green-Blue) GP 6220 3302 724
With built in LED indicator light, (Red–Blue-Amber) GP 6220 3303 724
Fig. 18: Sensors with built-in LEDs