How it works?
1.
Fan module auto-calibration would launch in every system boot. The profile
would then be recorded and used until next reboot.
2.
Backplane starts fan calibration and calculates the corresponding PWM duty
cycle for each level. There are totally 8 speed levels to be calculated and used
until next system boot.
3.
The 8 levels of fan speed are mapped to the temperature readings detected
by thermistor spreading from 25 to 45
°C
in 3.75 degree C step.
4.
In normal operation, when the system temperature changes to next level, the
fan module would change speed accordingly. And, the Fan failure alarm
would be triggered when the RPM of the Fan module is dropped lower than
75% of its expected speed.
5.
The fan module calibration and control profile are as below.
Summary of Contents for 2RAKVI001000
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