Drivers: Proportional Driver Menu - Curtis 1232E Manual

3 — PROGRAMMABLE PARAMETERS:
ALLOWABLE
PARAMETER
On / Off
PD Enable
pcf
PD_Enable On / Off
OptionBits1 [Bit 6]
0x306A 0x00
On / Off
Hyd Lower Enable
Hyd_Lower_Enable On / Off
OptionBits1 [Bit 7]
0x306A 0x00
0.00 – 2.00 A
PD Max Current
PD_Max_Current
0x3040 0x00
0.00 – 2.00 A
PD Min Current
PD_Min_Current
0x3041 0x00
0 – 100 %
PD Dither %
PD_Dither_Percent 0 – 32767
0x3042 0x00
16 – 112 ms
PD Dither Period
PD_Dither_Period
0x3043 0x00
1 – 100 %
PD Kp
PD_Kp 82 – 8192
0x3044 0x00
1 – 100 %
PD Ki
PD_Ki 327 – 32767
0x3045 0x00
* These parameter descriptions assume the proportional driver
is being used to drive a proportional valve, and that the PD
current control software is active (PD_Enable = On).
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2 4 N O V E M B E R 2 0 1 5
Proportional Driver Parameters

DRIVERS: PROPORTIONAL DRIVER MENU

RANGE
Determines how the PWM of the proportional driver is controlled.
When programmed On, it is controlled by the controller's PD current control
software. When programmed Off, it is controlled by the VCL function
Put_PWM (PWM5, value); see Figure 17, page 119.
When programmed On, lowering is controlled by throttle position.
When programmed Off, lowering is controlled by the VCL variable VCL_PD_
Throttle; see Figure 17, page 119.
The Lower speed is determined by the aperture of the proportional valve.
*
This parameter sets the maximum allowed current through the valve,
0 – 607
which in turn defines its aperture.
Sets the minimum allowed current through the proportional valve.
*
Most proportional valves need a non-zero closed current in order to start
0 – 607
opening immediately when Lower is requested.
Dither provides a constantly changing current in the coil to produce a rapid
*
back-and-forth motion of the valve; this keeps the valve lubricated and
allows low-friction, precise movement. The PD Dither % parameter specifies
the amount of dither as a percentage of the PD max current, and is applied
in a continuous cycle of add%-subtract%.
Sets the period for proportional valve dither.
*
1 – 7
Sets the proportional gain of the current feedback controller. Higher gains
*
force the control loop to respond quickly but may cause oscillations.
Sets the integral gain of the current feedback controller. Integral gain tries
*
to force the error to zero. Higher gains force the control loop to respond
quickly but may cause oscillations.
DESCRIPTION
Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE Manual,
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