Return to TOC Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
4 — PROGRAMMABLE PARAMETERS
pg. 55
DRIVERS: MAIN CONTACTOR MENU, cont’d
PARAMETER ALLOWABLE
RANGE
DESCRIPTION
Holding Voltage
Main_Holding_Voltage
0x303D 0x00
0 – 100%
0 – 32767
The main contactor holding voltage parameter allows a
reduced average voltage to be applied to the contactor coil
once it has closed. This parameter must be set high enough
to hold the contactor closed under all shock and vibration
conditions the vehicle will be subjected to.
NOTE: The Battery Voltage Compensated parameter (below)
controls whether the pull-in and holding voltages are battery
voltage compensated.
Battery Voltage Compensated
|Main_Driver_Battery_Voltage_Compensated
|Main_Driver_Battery_Voltage_Compensated_Bit0 [Bit 0]
0x302C 0x00
On / Off
On / Off
This parameter determines whether the main pull-in and
holding voltages are battery voltage compensated. When
set On, the pull-in and holding voltages are set relative to
the set Nominal Voltage (see Battery Menu). In other words,
the output voltage is adjusted to compensate for swings
in battery voltage, so the percentage is relative to the set
Nominal Voltage—not to the actual voltage.
For example, suppose Nominal Voltage is set to 48V and
Holding Voltage is set to 75% (36V) to the output driver.
Now suppose the bus voltage dips to 40V. If Battery Voltage
Compensated = On, the output will still be 36V (Nominal
Voltage x Holding Voltage) to the coil. If Battery Volt- age
Compensated = Off, the output will be 30V (Actual Voltage ×
Holding Voltage) to the coil.
Interlock Type
Interlock_Type
0x303E 0x00
0 – 2
0 – 2
Three interlock options are available:
0 = interlock turns on with switch 3.
1 = interlock controlled by VCL functions.
2 = interlock turns on with KSI.
Open Delay
Open_Delay
0x303F 0x00
0.0 – 40.0 s
0 – 10000
Applicable only when Interlock Type = 0 or 1. The delay can
be set to allow the contactor to remain closed for a period
of time (the delay) after the interlock switch is opened. The
delay is useful for preventing unnecessary cycling of the
contactor and for maintaining power to auxiliary functions
that may be used for a short time after the interlock switch
has opened.
Weld Check Enable
|Weld_Check_Enable
|OptionBits1 [Bit 2]
0x306A 0x00
On / Off
On / Off
When programmed On, the controller performs a test to
make sure the main contactor is open (not welded shut)
before it is commanded to close. This test is not performed if
this parameter is Off. The main contactor driver, however, is
always protected from short circuits.
Weld Check On Open Enable
Weld_Check_On_Open_Enable_Bit0 [Bit 0]
0x30E0 0x00
On / Off
On / Off
When programmed On, the controller performs a test to
make sure the main contactor is open (not welded shut)
after it is commanded to open. This test is not performed if
this parameter is Off.
Main DNC Check Enable
|Main_DNC_Check_Enable
|OptionBits4 [Bit 7]
0x306D 0x00
On / Off
On / Off
When programmed On, the controller performs a test
immediately after the main contactor is commanded to
close, to make sure the contactor has in fact closed. The test
is not performed if this parameter is programmed Off. The
main contactor driver, however, is always protected from
short circuits.
Precharge Enable
|Precharge_Enable
|OptionBits2 [Bit 6]
0x306B 0x00
On / Off
On / Off
Turns the precharge feature (see page 14) on and off.
Precharge provides a limited current charge of the
controller’s internal capacitor bank before the main contactor
is closed. This decreases the arcing that would otherwise
occur when the contactor is closed with the capacitor
bank discharged.
Quick Link:
Battery menu p.69
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