Eaton HFX Series - PWM Faults

EATON HFX Product Family Installation and Operation Manual E-ELCL-II002-E2 July 201950
HFX Product Family
Fault table indicating PWM faults:
The range limits for many of the faults have default values that can be overwritten in the appropriate
I/O conguration tab. Please see below:
DUTY_HS and VLOAD_RATIO – In High Side output
conguration, if duty cycle is commanded below
DUTY_HS (25%) and (Voltage on output/Input Load
Power) >VLOAD_RATIO (90%), then trigger the
“Short to Power” fault.
DUTY_LS and VLOAD_RATIO – In Low Side output
conguration, if duty cycle is commanded above
DUTY_LS (50%) and (Voltage on output/Input Load
Power) >VLOAD_RATIO (90%), then trigger the
“Short to Power” fault.
OPEN_DUTY and OPEN_CURRENT – If the duty
cycle is commanded above OPEN_DUTY (10%) and
the measured current is less than OPEN_CURRENT
(50mA), trigger the PWM output “Open is Active”
fault.
GND_SHRT_DUTY and GND_SHRT_VRATIO – In
Low Side output conguration, if duty cycle is
commanded below GND_SHRT_DUTY (10%) and
(Voltage on output/Input Load Power) <GND_SHRT_
VRATIO (10%), trigger the “Open is Active” fault
MAX_CURRENT – If measured current is greater than
MAX_CURRENT, then trigger the “Over Current”
Fault.
OFF_CURRENT – If the output duty cycle is 0% and
the measured current is greater than OFF_CURRENT
(75mA), then trigger the “Loss of Control” fault.