Curtis 1239E - CAN INTERFACE MENU

4 — PROGRAMMABLE PARAMETERS
Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
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BATTERY MENU, cont’d
PARAMETER ALLOWABLE RANGE DESCRIPTION
Reset Volts Per Cell
BDI_Reset_Volts_Per_Cell
0x3170 0x00
0.900 – 3.000 V
900 – 3000
The reset voltage level is checked only once, when the main contactor
rst closes. Note that the BDI Reset Percent parameter also inuences
the algorithm that determines whether BDI Percentage is reset to 100%.
Reset Volts Per Cell should always be set higher than Full Volts Per Cell.
Reset Voltage Level = Reset Volts Per Cell × number of cells in the
battery pack.*
Full Volts Per Cell
BDI_Full_Volts_Per_Cell
0x3171 0x00
0.900 – 3.000 V
900 – 3000
The full voltage level sets the B+ (capacitor voltage) that is
considered to be 100% state-of-charge; when a loaded battery
drops below this voltage, it begins to lose charge. Capacitor Voltage
is viewable in the programmer’s Monitor » Battery menu.
Full Voltage Level = Full Volts Per Cell × number of cells in the
battery pack.*
Empty Volts Per Cell
BDI_Empty_Volts_Per_Cell
0x3172 0x00
0.900 – 3.000 V
900 – 3000
The empty voltage level sets the Capacitor Voltage that is considered to
be 0% state-of-charge.
Empty Voltage Level = Empty Volts Per Cell × number of cells in the
battery pack.*
Discharge Time
BDI_Discharge_Time
0x3173 0x00
0 – 600 minutes
0 – 600
Sets the minimum time for the BDI algorithm to count down the BDI
Percentage from 100% to 0%. The BDI algorithm integrates the time
the ltered capacitor voltage is below the state of charge voltage level.
When that cumulative time exceeds the Discharge Time / 100, the BDI
Percentage is decremented by one percentage point and a new state of
charge voltage level is calculated.
State of Charge Level = [(Full Voltage Level – Empty Voltage Level) ×
BDI Percentage / 100] + Empty Voltage Level.
BDI Reset Percent
BDI_Reset_Percent
0x3174 0x00
0 – 100%
0 – 100
When a battery has a high BDI percentage, its oat voltage when the
main contactor is rst closed can sometimes cause false resets. The
BDI Reset Percent parameter addresses this problem by allowing the
user to dene a BDI Percentage value above which the BDI Percentage
variable will not reset.
When the main contactor is rst closed, the BDI Percentage variable
will reset to 100% only if ((Capacitor Voltage > Reset Voltage Level) and
(BDI Percentage < BDI Reset Percent)).
Insulation Resistance Fault Threshold
Insul_Res_Thres_kOhms
0x3870 0x00
0 – 999 kW
0 – 999
Sets the threshold below which an Insulation Resistance Low Fault
(fault code 76) occurs. See Isolation Monitor overview on page 28,
Insulation Resistance on page 80, and also page 92 for more details.
Setting this parameter to zero will disable the isolation monitor.
* To determine the number of cells in the battery pack, divide the Nominal Voltage setting (page 69) by the battery chemistry’s nominal volts-per-cell.
Lead Acid: 2.0 V/cell, nominal.
NOTE: For non-Lead-Acid batteries, including Lithium-Ion battery packs, use the pack’s or cell manufacturer’s approved Battery Management System
(BMS) for determining BDI.