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Digital Pump Control Module
Series PQDXXA-Z10
Installation and Setup Manual
Bulletin HY30-3255-INST/UK
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump&MotorDivisionEurope
Chemnitz, Germany
Default ramp times – recommended ramp times for displacement control:
MIN:WP / MAX:WP (Setting of the pressure command scaling):
MIN:WP Setting of the lower limit of the internal pressure command signal.
MAX:WP Setting of the upper limit of the internal pressure command signal.
MIN:WP and MAX:WP WQ can be used to set a minimum pressure respectively a maximum
pressure without changing the command signal resolution 0-10 V.
AIN:WP (Command signal type – pressure control):
The command signal of the pressure control can either be a current signal [C, 4-20mA] or a voltage
signal [V, 0-10V]. Default setting is a voltage signal.
Voltages at PIN 14 are not monitored by the broken cable (SENS) detection.
AP:UP / AP:DOWN (Setting of ramp times – pressure control):
AP:UP Ramp time setting for rising pressure command signals in ms.
AP:DOWN Ramp time setting for dropping pressure command signals in ms.
It is recommended to activate ramps to achieve sustainable system stability. Ramps can be acti-
vated with a suitable voltage signal to PIN 5 / RAMP ON.
Ramptimesinthesoftwarerefertoacommandstepof100%anddenetherampgradient.Ramp
times are proportional to the percentage of the command steps.
The optimal ramp time setting is for pressure control depending on the system, it is espe-
cially depending on the hydraulic capacities and the different operating points. The set-up
at the specific system may help to optimize the pressure control.
Frame
size
Pump
displacement
[cm
3
/rev]
System
pressure
[bar]
Ramp time [ms]
Rising command values Falling command values
FD* / UD* FP* / UP* FD* / UD* FP* / UP*
1 16 350 33 50 41 50
1 20 350 37 55 46 50
1 23 350 40 60 51 50
1 28 350 44 65 57 50
2 32 350 47 80 62 65
2 40 350 51 80 67 65
2 46 350 54 80 72 65
3 63 350 58 120 78 110
3 80 350 61 120 83 110
3 92 350 65 120 88 110
4 140 350 87 135 112 165
4 180 350 110 180 136 175
5 270 350 132 195 159 185
6 360 350 154 225 183 245
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