Continental Hydraulics Installation Manual
Page 19 of 24
CEM-PA-B
CHI 1020688 01/2016
PWM (PWM Frequency)
Command
Parameter
Unit
Group
PWM
X
x= 61… 2604
Hz
EXP
The frequency can be changed in defined steps (61 Hz, 72 Hz, 85 Hz, 100 Hz, 120 Hz,
150 Hz, 200 Hz, 269 Hz, 372 Hz, 488 Hz, 624 Hz, 781 Hz, 976 Hz, 1201 Hz, 1420 Hz,
1562 Hz, 1736 Hz, 1953 Hz, 2232 Hz and 2604 Hz). The optimum frequency depends
on the valve.
If the PWM frequency is less than 500 Hz, the dither amplitude DAMPL should be set to
zero.
The PPWM and IPWM parameters should be adapted when using low PWM frequencies
because of the longer dead times which forces a reduced stability of the closed loop
control.
ACC (Current loop auto adjustment)
Command
Parameter
Unit
Group
ACC
X
x= ON|OFF
-
EXP
Operation mode of the closed loop current control.
ON
:
In automatic mode PPWM and IPWM are calculated depending on the pre-set
PWM-frequency.
OFF
:
Manual adjustment.
