3 — PROGRAMMABLE PARAMETERS
pg. 57
Curtis Model 1351 – December 2018
PARAMETER
ALLOWABLE RANGE
DEFAULT
DESCRIPTION
Control Mode
Driver_X_Mode
Parameter’s CAN Index by
Driver_X_Mode
5 = 0x30E4 0x00
6 = 0x30E5 0x00
7 = 0x30E6 0x00
8 = 0x30E7 0x00
9 = 0x30E8 0x00
10 = 0x30E9 0x00
Off
Direct PWM
Voltage Comp
Current Cntrl
0
1
2
3
Off
0
Sets the mode for Driver X
X= 5 – 10 for the VCL name
Driver_X_Mode
0 = Off
(Open mode)
This mode is used when the driver output is disabled to
allow the pin to be used as an Input (i.e., Switch 2)
1 = Direct PWM
(normal PWM percentage operation)
The driver’s FET and wiring diagnostics are performed in
this mode.
2 = Voltage Comp
(Voltage Compensated)
Regulates the driver PWM based on the command, the
nominal voltage setting and the present battery voltage in
an attempt to provide a constant average voltage at the
output. As the battery voltage drops, the PWM percentage
will increase to compensate for the lower voltage. The
driver’s FET and wiring diagnostics are performed in this
mode. The initial and continuous PWM percent timing
control is also applied in this driver control mode.
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
5 = 0x3134 0x00
6 = 0x3135 0x00
7 = 0x3136 0x00
8 = 0x3137 0x00
9 = 0x3138 0x00
10 = 0x3139 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= 5 – 10 for the VCL name
Driver_X_Ramp_Up_Time
Direct PWM:
This is the time to change the pulse
width modulation percentage
Voltage Comp:
This is the time to change the nominal
voltage percentage.
(Note, Coil Return = B
+
voltage)
Current Cntrl:
This is time 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 in the Initial Level
parameter.
Ramp Down
Driver_X_Ramp_Down_Time
Parameter’s CAN Index by
Driver_X_Ramp_Down_Time
5 = 0x3144 0x00
6 = 0x3145 0x00
7 = 0x3146 0x00
8 = 0x3147 0x00
9 = 0x3148 0x00
10 = 0x3149 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= 5 – 10 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_X_Command = 0). The ramp down duration is
not applied when the 1351 is turned off (switched off).
OUTPUTS — PWM DRIVERS, cont’d