Parker PQDXXA-Z10 - Page 33

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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&MotorDivisionEurope
Chemnitz, Germany
CQ:IC (Integrator Activation)
Integrator activation of the closed loop displacement control in 0,01% (of full scale).
This parameter works as threshold value for the integrator activation (Q-PID controller). If the actual
pressure value is higher than the command value, the integrator freezes. If the actual pressure
value falls below the programmed threshold between command and actual value, the integrator
is enabled again.
This function shuts down with CQ:IC = 0. In this case, the integrator is active all time.
CP:FF (Offset Pressure Control Valve)
Offset parameter (in 0,01%) to open the valve controlled.
This Typical value = 8000…9000.
CP:I_LIM (Integrator Limitation)
Integrator limitation of the closed loop pressure control in 0,01%.
The integrator compensates the systems nonlinearities only. Therefore this parameter should be
chosen as small as possible.
Typical value = 2500 (25 %). Depending on systems linearity this value can also be higher.
CP:IC (Integrator Activation)
Integrator activation of the closed loop pressure control in 0,01%.
The Integrator gets activated within these limits (in % of full scale). This reduces the overshoot
while starting the closed loop control.
Typical value = 500…5000.
This function shuts down with CQ:IC = 0. In this case, the integrator is active all time.
MR:T1 (system time constant)
System time constant in 0,1 ms (typical = 0,5 T2) in 0,1 ms.
MR:T2 (system time constant)
System time constant in 0,1 ms.
MR:T1 and MR:T2 are parameters for the MR control. Currently only the PID control is supported.
DFREQ:Q (Dither Frequency)
Dither frequency of the displacement control valve in Hz.
DAMPL:Q (Dither Amplitude)
Dither amplitude of the displacement control valve in 0,01% of the current.
The Dither can be set with Dither amplitude and Dither frequency.
The below mentioned value for Dither amplitude and frequency should not be changed
when using a PVCMD1FB*** or a PVCM*PV**!
DFREQ:Q = 120
DAMPL:Q = 400