Wesley BC-620-4CA - Manual (Page 53)

Curtis 1234/36/38 Manual,
OS
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2 3 J U LY 2 0 0 8 D R A F T
3 — PROGRAMMABLE PARAMETERS: Main Contactor Parameters
MAIN CONTACTOR MENU, cont’d
ALLOWABLE
PARAMETER RANGE DESCRIPTION
Main DNC Threshold 0–84.0 V When Checks Enable = On, this parameter is used as the threshold for
Main_DNC_Threshold 0–5376 detecting a Main Did Not Close fault. The Main DNC Threshold is the
minimum voltage difference between the Keyswitch and Capacitor
voltages. When the voltage difference is below 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 detect. 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 On/Off Turns the precharge feature on and off. Precharge provides a limited
Precharge_Enable On/Off current charge of the controller’s internal capacitor bank before the main
OptionBits2 [Bit 6] contactor is closed. This decreases the arcing that would otherwise occur
when the contactor is closed with the capacitor bank discharged.