Parker HPD8N - Page 34

Parker Hannifin S.p.A. - S.B.C. Division HPD N User’s Manual
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Pr5 Internal reference. Unit=rpm, range=±9000, default=0. If b40.12=1 and b40.13=0,
Pr7 will be the same as Pr5.
Pr6 Reserved read-only speed reference. Unit=rpm, range=±9000. If b40.2=1 Pr6 is
only utilised as a speed reference for the control loop. The active operating mode will
enter its speed request in parameter Pr6.
Pr7 Main reference (read-only parameter). Unit=rpm, range=±9000. If b40.2=0, Pr7 is
used as a reference for the speed control loop. In certain operating modes Pr7 can be
used as a reference for other factors (torque / acceleration). In this case Pr7 is
expressed in a suitable unit.
Pr8 Acceleration ramp for positive speed values. Unit=s/krpm range=0.002..65.535,
resolution=0.001 s, default=0.002 s. Acceleration for positive speeds required of the
motor by way of the speed reference is internally limited so that acceleration of 1000
rpm takes Pr8 seconds.
Pr9 Deceleration ramp for positive speed values. Unit=s/krpm, range=0.002..65.535,
resolution=0.001 s, default=0.002 s. Deceleration for positive speeds required of the
motor by way of the speed reference is internally limited so that deceleration of 1000
rpm takes Pr9 seconds.
Pr10 Acceleration ramp for negative speed values. Unit=s/krpm, range=0.002..65.535,
resolution=0.001 s, default=0.002 s. Acceleration for negative speeds required of the
motor by way of the speed reference is internally limited so that acceleration of 1000
rpm takes Pr10 seconds.
Pr11 Deceleration ramp for negative speed values. Unit=s/krpm, range=0.002..65.535,
resolution=0.001 s, default=0.002 s. Deceleration for negative speeds required of the
motor by way of the speed reference is internally limited so that deceleration of 1000
rpm takes Pr11 seconds.
Pr12 Deceleration ramp for stroke end and stop functions. Unit=s/krpm,
range=0.002..65.535, resolution=0.001 s, default=0.002 s. Deceleration required of
the motor by the stroke limit and stop functions is internally limited so deceleration
of 1000 rpm takes Pr12 seconds.
Pr13 Overspeed threshold. Unit=rpm, range=0..+13000, default=3500. If the absolute
value for motor speed exceeds the value entered in Pr13, b41.0 must be =1, otherwise
it will be = 0.
Pr14 High speed threshold. Unit=rpm, range=±13000, default=20. When b40.7=0, if the
speed difference between motor and reference is less than Pr14 and greater than
Pr15, b41.1 will be =1, otherwise it will be = 0. In the case of b40.7=1, if motor
speed is less than Pr14 and higher than Pr15, b41.1 will be =1, otherwise it will be
=0.
Pr15 Low speed threshold. Unit=rpm, range= ±13000, default=20. When b40.7=0, if the
speed difference between motor and reference is less than Pr14 and greater than
Pr15, b41.1 will be =1, otherwise it will be =0. In the case of b40.7=1, if motor speed
is less than Pr14 and higher than Pr15, b41.1 will be =1, otherwise it will be =0.
Pr16 Integral gain of speed control loop. Range =0...32767, default=120.
Pr17 Speed control loop damping. Range=0...32767, default=2000. If Pr16 is set to zero
Pr17 sets the value for proportional gain of the speed control loop.
Pr18 Bandwidth limiter. Unit=512μs, range=0..1000, default=1. Use Pr18 to set the time
constant of a first order filter located on the digital torque demand signal. The filter
cut-off frequency will be: 310/Pr18 Hertz.