Consilium SELUX ST, Installation And Service Manual

Page: 27 / 180

INSTALLATION AND SETTING
1.10 Rev. E
3. Follow the configuration instructions described in Chapter 3
4. Check the phases status trough the LED on the Alpha PCB.
The three phases are given by the gyro with a 3 bit Gray code. The purpose of
this code is to detect the increment of the value and its sign; its most important
characteristic is that only one of the three bits at the time can change and in
this application (normally is not a characteristic of the Gray code), the 3 bits
cannot have all the same level. To give a quick look to the Gray code see the
four green LED on the Alpha:
1. The first one next to red LED is D33 and it indicates the first phase (S1).
2. The second one is D34 and it is the second phase indicator (S2).
3. The third one is D35 and it indicates the third phase (S3).
4. The last one is D36 and it is to indicate the Reference.
Now that the LED are individuated move the gyro or anyway simulate a steering
and the three LEDs (S1, S2 and S3) will start to change their state and will be
easy to observe that they will be never all on or all off and only one of them at
the time will change its state.
WARNING
THE GYRO INTERFACE SHOULD BE CONFIGURED CORRECTLY
ACCORDING TO TYPE OF SENSOR CONNECTED, OTHERWISE
LEVELS AND LED SIGNALS WILL BE LIGHTED WRONGLY ALSO
WHEN THE SIGNALS ARE AVAILABLE.
S1 S3 S2
Gyro Phases combinations in Gray
code