Drive Controlled Pump
Parker Hannifin Corporation
Hydraulics Group
DCP Manual innen A4 UK.indd 06.11.17
47
Manual
Settings Pressure Controller
Menu item
Setup::Application::Status p,LS,pQ Control
Monitor::Application::
Status p,LS,pQ Control
PNO
1968
1969
1970
1971
Parameter name
Pressure Controller Kp
Pressure Controller Ki
Pressure Controller Kd
Controller Output
Parameter
description
Proportional gain of pressure
controller [%/Bar]
Integral gain of pressure
controller [%/Bar×ms]
Differential gain of pressure
controller [%×ms/Bar]
Controller output signal of
pressure [%]
Function
Proportional gain of pressure
controller. The output is cal-
culated: “(target value – actu-
al value) × p-gain”.
Integral gain of pressure con-
troller.
Differential gain of pressure
controller.
Controller output signal
(yp+yi+yd).
Menu item
Monitor::Application::
Controller Status
Monitor::Application:: Status p, LS, pQ Control
PNO
1972
1973
1974
1975
Parameter name
Tracking Error
Inner window Ipart
Outer window Ipart
Pos. Limit Ki
Parameter
description
Pressure tracking error [bar]
Inner window of I-part [bar]
Outer window of I-part [bar]
Positive limit of I-part [%]
Function
This parameter displays the
pressure tracking error. De-
pending on the application it is
calculated different. For p- and
pQ control: “pressure setpoint
– actual pressure”. For LS-con-
trol: “delta pressure setpoint –
actual delta pressure”.
The inner window limits the
working range of the integra-
tor of the pressure controller. If
the tracking error is less than
the inner window, the integra-
tor stops working and the out-
put will stay constant.
The outer window limits the
working range of the integra-
tor of the pressure controller.
If the tracking error exceeds
the outer window, the integra-
tor stops working and the out-
put will stay constant.
This value limits the output of
the integrator of the pressure
controller in a positive direction.
Menu item
Monitor::Application:: Status p, LS, pQ Control
Monitor::Application::
Controller Status
PNO
1976
1977
1978
1982
Parameter name
Neg. Limit Ki
Rate Feedback
Pressure Controller Td
Controller yp
Parameter
description
Negative limit of I-part [%]
Speed feed forward
Time constant of D-term [ms] Output signal of the derivator
[%]
Function
This value limits the output
of the integrator of the pres-
sure controller in a negative
direction.
This value contains the speed
feed forward term. The ac-
tual rotation speed is multi-
plied by this factor and added
to the controller output signal.
The min. rotation speed of the
pump(s) is compensated.
Time constant of derivator.
Shows the derivator part of the
controller output signal.
Menu item
Monitor::Application:: Controller Status
PNO
1983
1984
Parameter name
Controller yi
Controller yd
Parameter
description
Stellsignal yi
Stellsignal yd
Function
Shows the integral part of the
controller output signal.
Shows the differenztial part
of the controller output signal.
Settings Pressure Valve
Menu item
Setup::Application::Pressure Valve
Favoriten:
PNO
1990
1991
1992
Parameter name
Max p Pressure Valve
Feed Forward pressure Valve
Faktor PID pressure Valve
Parameter
description
Maximum pressure of
pressure relief valve [bar]
Feed forward gain of
pressure relief valve [%/Bar]
Gain factor controller output
pressure relief valve
Function
This value sets the maximum
pressure of the pressure relief
valve at 100% control signal.
This value sets the pressure
feed forward gain for the pro-
portional pilot pressure valve.
If the pressure relief valve
opens before the drive has
reached the minimum speed,
the feed forward gain has to
be increased.
This value adjusts the gain
of the controller output to the
pressure relief valve.