Continental Hydraulics Installation Manual
Page 20 of 24
CEM-PA-B
CHI 1020688 01/2016
PPWM (P gain of the current loop)
IPWM (I gain of the current loop)
Command
Parameters
Unit
Group
PPWM
X
IPWM
X
x= 0… 30
x= 1… 100
-
-
EXP
The PI current controller for the solenoids is parameterized with these commands.
These parameters should not be changed without adequate measurement facilities and
experience.
Attention, if the parameter ACC is set to ON, these adjustments are done automatically.
If the PWM frequency is < 250 Hz, the dynamic of the current controller has to be
decreased.
Typical values are: PPWM = 1… 3 and IPWM = 40… 80.
If the PWM frequency is > 1000 Hz, the default values of PPWM = 7 and IPWM = 40
should be chosen.
PROCESS DATA (Monitoring)
Command
Description
Unit
WA
W
X
E
U
IA
Input signal
Command value
Feedback value
Control error
Output
Solenoid current
5
mm
mm
mm
mm
%
mA
The process data are the variables which can be observed continuously on the
monitor or on the oscilloscope.
5
The display of the solenoid current (in CHI-PC program) is damped in order to be able to bring out a stable
signal.
