4 — PROGRAMMABLE PARAMETERS
Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017 Return to TOC
pg. 52
DRIVERS: MAIN CONTACTOR MENU, cont’d
PARAMETER ALLOWABLE
RANGE
DESCRIPTION
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, page 62). 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.
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.
Main DNC Runtime Threshold
Main_DNC_Runtime_Threshold
0x3032 0x00
0.0 – 200.0 V
0 – 12800
Sets the threshold used for the ongoing check that ensures
the main contactor remains closed while in operation. The
Main DNC Runtime Threshold is the maximum voltage
difference between the Keyswitch and Capacitor voltages.
When the voltage difference is above this threshold, and the
battery current is low, a Main Did Not Close fault will be set.
Setting this parameter lower will increase the sensitivity of
the fault detection. Setting this parameter too low may cause
false fault trips due to normal voltage drops between the
keyswitch and capacitor voltages.
Setting this parameter = 0 V will disable the Main Did Not
Close fault check.
Precharge Enable
|Precharge_Enable
|OptionBits2 [Bit 6]
0x306B 0x00
On / Off
On / Off
Turns the precharge feature 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.
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