Wesley BC-620-4CA - Manual (Page 60)

56 Curtis 1234/36/38 Manual,
OS
11
BDI Algorithm
The BDI (battery discharge indicator) algorithm continuously calculates
the battery state-of-charge whenever KSI is on. The result of the BDI algo-
rithm is the variable BDI Percentage, which is viewable in the 1311 menu
Monitor » Battery. When KSI is turned off, the present BDI Percentage is
stored in nonvolatile memory.
The standard values for volts per cell are as follows, for flooded lead
acid and sealed maintenance-free batteries.
BATTERY TYPE
FLOODED SEALED
Reset Volts Per Cell 2.09 2.09
Full Volts Per Cell 2.04 2.04
Empty Volts Per Cell 1.73 1.90
Use the standard values for your type of batteries as the starting point in
setting the reset, full, and empty volts-per-cell parameters.
3 — PROGRAMMABLE PARAMETERS: Battery Parameters
BATTERY MENU, cont’d
ALLOWABLE
PARAMETER RANGE DESCRIPTION
User Undervoltage 50–80 % The value of this parameter is a percentage of the Nominal Voltage setting.
User_Undervoltage 128–204 The User Undervoltage parameter can be used to adjust the undervoltage
threshold, which is the voltage at which the controller will cut back drive current
to prevent damage to the electrical system.
Typically this parameter is changed only when the controller is being used
in an application at the high end of the controller’s range: such as a 24–36V
controller being used in a system with a 36V battery pack. In this case, the
undervoltage threshold can be lowered by setting the User Undervoltage to
a lower value. The undervoltage threshold can never be lowered below the
controller’s power base minimum voltage rating.