2.5.6.4.2 Speedometer Gauge Operation
The Master gauge receives speed information either via CAN or via one of the frequency inputs. During configuration the
source of the speed information has to be defined. The input signal is first converted into a physical speed value. The micro-
controller calculates the deflection angle of the speedometer based on this physical speed value and gauge output characteri-
stic.
Specification of odometer storage
The standard Speedometer version of the Master gauge contains an Odometer. It can be configured that also the Tachometer
can have an Odometer instead of an Hourmeter. The Odometer consists of a total Odometer and a Tripodometer. Both can
be displayed on the dot matrix LCD as two lines. Format is 6 digits for total km, landmiles, nautical miles or meter and 4 di-
gits, decimal point and 1 digit for 1/10 kilometer, land mile or nautical mile. The resolution of meter is 1m.
a.
Information comes from CAN-Bus Interfaces (one of two):
For the Odometer indication it must be ensured that a ECU is broadcasting this information on the CAN-Bus. If no signal is
received only dashes will be indicated.
b.
Total odometer information generated by master gauge:
The Odometer information will be written to EEPROM every 1km. A ring counter algorithm is applied to save and recover the
information from EEPROM. The rest-distance is written to EEPROM 10 sec after ignition has been turned off.
A special 16-word-ring-counter algorithm is applied to recover the odometer in case the battery was disconnected.
With nominal input frequency applied, the odometer shall indicate calculated mileage within ± 0.3% [SAE J1226].
2. Functional Specification
Product Manual
Technische Änderungen vorbehalten Technical details subject to change
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TU00-0726-0000002
0609
Summary of Contents for CANcockpit Series
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Page 55: ...Example of a fully configured Instrumentation June 2009 Training WinGauge Software page 3 ...
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