Continental Hydraulics Installation Manual
Page 30 of 33
CEM-AA-B
CHI 1020611 01/2016
PWM (PWM frequency)
Command
Parameters
Unit
Group
FUNCTION
PWM:I
X
i= A|B
x= 61… 2604
Hz
EXP
A-B
PWM
X
x= 61… 2604
Hz
EXP
AA
RA
The frequency can be changed in the 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.
Attention:
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 (Auto adaptation of the closed loop current controller)
Command
Parameters
Unit
Group
FUNCTION
ACC
x
x= ON|OFF
-
STD
AA
A-B
RA
Operation mode of the closed loop current control.
ON
:
In automatic mode PPWM and IPWM are calculated depending on the preset PWM-
frequency.
OFF
:
Manual adjustment.
