3 — PROGRAMMABLE PARAMETERS
Curtis Model 1351 – December 2018
pg. 54
PARAMETER
ALLOWABLE RANGE
DEFAULT
DESCRIPTION
3 = Current Cntrl
(Current Control)
Regulates the current through the driver. Typically used to
control Proportional Valves (PV). This mode interprets the
command as a load current request to regulate the PWM
(via a PI controller) and thus the requested load current.
Ramp Up
Driver_X_Ramp_Up_Time
Parameter’s CAN Index by
Driver_X_Ramp_Up_Time
1 = 0x3130 0x00
2 = 0x3131 0x00
3 = 0x3132 0x00
4 = 0x3133 0x00
0 – 10000 ms
0 – 10000
8 ms
8
The time in milliseconds to go from the minimum to the
maximum control mode type, as a linear ramp-up.
X= 1 – 4 for the VCL name
Driver_X_Ramp_Up_Time
Direct PWM:
This is the time (duration) to change
the pulse width modulation percentage
Voltage Comp:
This is the time (duration) to change
the applied average voltage.
Current Cntrl:
This is time (duration) to change the
current between the minimum and
maximum driver current setting.
A value of 0 milliseconds disables any ramping, resulting in a
step-function-change when the driver command increases.
Note that this
Ramp Up
is not applied to the Initial Level
parameter.
Ramp Down
Driver_X_Ramp_Down_Time
Parameter’s CAN Index by
Driver_X_Ramp_Down_Time
1 = 0x3140 0x00
2 = 0x3141 0x00
3 = 0x3142 0x00
4 = 0x3143 0x00
0 – 10000 ms
0 – 10000
8 ms
8
The time in milliseconds to go from the minimum to the
maximum control mode type, as a linear ramp-down.
X= 1 – 4 for the VCL name Driver_X_Ramp_Down_Time
Direct PWM:
This is the pulse width percentage.
Voltage Comp:
This is nominal voltage percentage.
(Note, Coil Return = B
+
voltage)
Current Cntrl:
This is percentage between the maximum
and minimum driver current setting
(See the Current Control parameters menu,
below)
A value of 0 millisecond disables any ramping resulting in a
step-function-change when the driver command decreases or is
stopped (Driver_1_Command = 0).
Initial Level
Driver_X_Hold_Level
Parameter’s CAN Index by
Driver_X_Hold_Level
1 = 0x3150 0x00
2 = 0x3151 0x00
3 = 0x3152 0x00
4 = 0x3153 0x00
0.0 – 100.0 %
0 – 1000
0.0 %
0
The percentage command for the Initial Hold Level.
X= 1 – 4 for the VCL name
Driver_X_Hold_Level
This is the percentage the driver will initially “jump to” without
ramping. This is affectedly the traditional contactor pull-in
parameter. For example, a high pull-in ensures contactor contact-
tips closure or a fast EM Brake release.
Direct PWM:
This is the pulse width percentage.
Voltage Comp:
This is nominal voltage percentage.
(Note, Coil Return = B
+
voltage)
Current Cntrl:
This is percentage between the maximum
and minimum driver current setting.
(See the Current Control parameters menu,
below)
Note that the Initial level may be above or below the applied
command.
OUTPUTS — PWM DRIVERS, cont’d
