Curtis Instruments AC F4-A User Manual

4 — PROGRAMMABLE PARAMETERS
Curtis AC F4-A Motor Controller – August 2020 Return to TOC
pg. 64
APPLICATION SETUP/BATTERY SETUP — OVER VOLTAGE CONTROLLER MENU
PARAMETER ALLOWABLE RANGE DEFAULT DESCRIPTION
User Overvoltage
User_Overvoltage
0x33A0 0x00
105 – 200 %
269 – 512
125 % The value of this parameter is a percentage of the Nominal
Voltage setting. Utilize the User Overvoltage parameter to
adjust the overvoltage threshold, which is the voltage when the
controller begins cutting back regen braking to prevent damage
to the electrical system or an untimely overvoltage shutdown.
Typically, this parameter is applicable in an application at the low
end of the controller's voltage range, such as a 48-80V controller
with a 48V battery pack. In this case, the overvoltage threshold
adjustment enables a usable battery voltage by setting the User
Overvoltage to an appropriate value, versus that of the controller’s
80V overvoltage specication.
The overvoltage threshold can never be raised above the
controller's power base maximum voltage rating.
APPLICATION SETUP/BATTERY SETUP — BDI SETUP MENU
PARAMETER ALLOWABLE RANGE DEFAULT DESCRIPTION
Reset Volts Per Cell
BDI_Reset_Volts_Per_Cell
0x33A7 0x00
0.900 – 3.000 V
900 – 3000
2.090 V The reset voltage level is checked only once when the keyswitch is
rst turned on. The BDI Reset Percent parameter also inuences
the algorithm that determines whether the BDI percentage is reset
to 100% at key on. The Reset Volts Per Cell parameter should
always be set higher than the Full Volts Per Cell parameter. This
parameter is applicable for lead-acid battery chemistry.
Reset Voltage Level = (Reset Volts Per Cell) × (Number of cells in
the battery pack).*
Full Volts Per Cell
BDI_Full_Volts_Per_Cell
0x33A4 0x00
0.900 – 3.000 V
900 – 3000
2.040 V This parameter sets the Keyswitch Voltage variable considered
to be 100% state-of-charge, and when a loaded battery drops
below this voltage, it begins to lose charge (lowering the BDI
percentage). The Keyswitch Voltage variable 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
0x33A3 0x00
0.900 – 3.000 V
900 – 3000
1.730 V The empty voltage level sets the Keyswitch_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
0x33A2 0x00
0 – 600 min
0 – 600
34 min This parameter 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 keyswitch 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
0x33A6 0x00
0 – 100 %
0 – 100
75 % When a battery has a high BDI percentage, its oat voltage at
KSI On 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 KSI is rst powered on the BDI Percentage variable will
reset to 100% only if [Keyswitch Voltage > Reset Voltage Level]
and [BDI Percentage < BDI Reset Percent].
* To determine the number of cells in the battery pack, divide the Nominal Voltage setting (above) 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 the SOC.
Quick Links:
BDI Indicator p.28

Curtis Instruments AC F4-A Specifications

General

Brand	Curtis Instruments
Model	AC F4-A
Category	Controller
Language	English