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5.5.4 PWM (PWM Frequency)
Command
PWM
This parameter is entered in Hz. The optimum frequency depends on the valve.
CAUTION: when using low PWM frequencies the PPWM and PPWM parameters should be
adjusted
4
.
The PWM frequency can only be set in defined steps. This means that there are deviations between
the specified and the actual frequency. The next highest frequency step is always used.
5.5.5 PPWM (P gain of the current loop)
5.5.6 IPWM (I gain of the current loop)
Command
PPWM
IPWM
The PI current controller for the solenoids is parameterized with these commands.
CAUTION: These parameters should not be changed without adequate measurement facilities and
experience.
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.
4
Due to the longer dead times at low PWM frequencies the stability of the control circuit is reduced. Typical values are
then: PPWM = 1... 3 and IPWM = 40... 70.
Page 21 of 24
Parameter
X
x= 60... 2650
Parameters
X
x= 0... 30
X
x= 1... 100
PAM-190-P-A/I
Unit
Group
Hz
STD
Unit
Group
-
EXP
-
05.06.2020
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