Curtis Instruments 1351 User Manual

3 — PROGRAMMABLE PARAMETERS
Curtis Model 1351 – December 2018
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pg. 34
SYSTEM CONTROLLER — POWER
PARAMETER ALLOWABLE RANGE DEFAULT DESCRIPTION
Keyswitch Voltage
Keyswitch_Voltage
0x331C 0x00
0.0 – 140.0 V
0 – 14000
Read Only The measured voltage at the KSI input (pin 7).
Nominal Voltage
Nominal_Voltage
0x3000 0x00
12.0 – 100.0 V
12000 – 10000
24.0 V
2400
This parameter is limited to the System Controller’s model
voltage. It must be set to the vehicle’s nominal battery pack
voltage. Use this parameter as a reference for determining the
Overvoltage and Undervoltage protection thresholds (see the Max
and Min Voltage parameters, below).
This sets the voltage that battery compensation functions will be
based upon.
See the dened nominal voltage in Table E in Appendix E.
Max Voltage
Max_Voltage
0x3243 0x00
24.0 – 100.0 V
2400 – 10000
24.0 V
2400
If the KSI exceeds this setting for >50ms, an Overvoltage fault
is issued, an Emergency message sent and the drivers will be
shutdown.
Min Voltage
Min_Voltage
0x3244 0x00
6.5* – 24.0* V
650 – 2400
0.0 V
0
If the KSI falls below this setting for >50ms, an Undervoltage fault
is issued, an Emergency message sent and the drivers will be
shutdown. The Undervoltage set point must be set at or above the
Brownout Voltage setting below.
Brown Out Voltage
Brown_Out_Voltage
0x3001 0x00
6.5* – 100.0 V
650 – 10000
0.0 V
0
Below this voltage, the system will start the brown out timer and
start saving NVM parameters. The Drivers will shut down.
* Depends on the Model, defaults shown are for the 12-36V model
Battery Discharge Indicator
e lead-acid battery discharge indicator (BDI) algorithm continuously calculates the battery state-
of-charge (SOC) from the keyswitch voltage (KSI, pin 7) at power-up. e result of the BDI algorithm
is the monitor variable BDI Reading, which is the state-of-charge percentage. When KSI is turned
o, the present BDI percentage is stored in nonvolatile memory.
For ooded lead-acid batteries and sealed maintenance-free lead-acid batteries, the standard values
for volts per cell are as follows,
Lead-Acid Battery Type
Parameter
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 these standard values for the battery’s starting point in setting the reset, full, and empty volts-
per-cell parameters.
Note: For non-lead-acid batteries, including Lithium-Ion battery packs, use the battery pack
or cell manufacturer’s approved Battery Management System (BMS) for determining the SOC.

Curtis Instruments 1351 Specifications

General

Brand	Curtis Instruments
Model	1351
Category	I/O Systems
Language	English