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© Carlo Gavazzi A/S
•
The calibration starts when the LED flashes green for 6 seconds at 4 Hz�
•
If the calibration is OK, the LED will respond with a constant green light�
Global calibration can be performed by means of the Configuration unit GP73800080� The GS7380
0080 is connected to the segment (L1 bus) in GTU8 mode� Selecting “global calibration" enables
simultaneous calibration of all the sensors connected to the segment�
The parking space must be empty during the calibration process� The procedure for global calibration
is the same as for local calibration�
Sensor Modes
The sensor has two modes� Normal mode or Lane mode�
In
Normal mode
, the sensor detects the presence of a car in the parking space and turns on the red
LED� See drawing below�
At the same time the sensor sends out a signal on the Dupline
®
3-wire L1 bus�
Fig. 29: Global calibration of sensors
Fig. 30: Vacant/occupied signaling
When the parking space is empty, the LED will change to green and also send out a signal on the
Dupline
®
3-wire L1 bus�
The sensor will not react to objects lower than 0�3 m� To avoid a weak signal, the sensor must be
installed pointing directly at a hard surface, like for instance concrete� A soft or uneven surface will
reduce the signal�
In
Normal mode
, the 3-colour sensor has an extra mode where it is possible to program the LED Ch1
and LED Ch2 to a Dupline address� This address has to be unique� The 3-coloured sensor is designed
to be used with the Dupline Carpark Software which enables control of the colour on each connected
sensor�
In
Lane mode
, the sensor is designed to be mounted on the ceiling above the lane� The sensor is able
to detect moving cars with a maximum speed of 20 km/hour� See fig� next page�
When the sensor detects a moving car, it sends a signal to the parking guidance system which reduc-
es the total amount of available spaces, and shows the reduced amount on the local display but also
on the display which shows the total amount of available spaces� This is to prevent too many moving
cars in a specific parking guidance system area� The sensor does not show the actual status on the
LEDs� The LEDs only work as feedback during calibration, startup and show the error status�
When the timer for lane mode has timed out, the displays will add up to the present value again�
Fig. 31: Global/local display