Curtis Instruments AC F4-A User Manual

4 — PROGRAMMABLE PARAMETERS
Curtis AC F4-A Motor Controller – August 2020 Return to TOC
pg. 80
APPLICATION SETUP — VEHICLE MENU
PARAMETER ALLOWABLE RANGE DEFAULT DESCRIPTION
Metric Units
Metric_Units
0x37C9 0x00
Off / On
0 – 1
Off (0) When this parameter is On, the distance variables (Vehicle
Odometer, Braking Distance Captured, Distance Since
Stop, Distance Fine, and the Capture Distance variables)
will accumulate and display in metric units (km, meters, or
decimeters). When programmed Off, the distance variables will
accumulate and display in English units (miles, feet, or inches).
Speed to RPM
Speed_to_RPM
0x37CE 0x00
10.0 – 3000.0
100 – 30000
253.0 This parameter affects the vehicle speed displayed in the
Monitor » Motor menu, and modies the VCL variable Vehicle_
Speed; it does not affect actual vehicle performance. The value
entered for Speed to RPM is a conversion factor that scales motor
speed to vehicle speed.
KPH to RPM: (G/d)*5305, where G = gear ratio, d = tire
diameter [mm].
MPH to RPM: (G/d)*336.1, where G = gear ratio, d = tire
diameter [in].
Hint: Use the vehicle tire’s rolling diameter for “d” based upon a
rollout measurement. Roll the vehicle a known number of wheel
revolutions and measure the distance.
Circumference (C) = Distance/wheel-revolutions. Diameter
(d) = C/Π. Π (pi)= 3.14159
Then use the Distance Since Stopped monitor variable to cover
a known distance (e.g., 50 – 100 feet) to align the value to the
measured distance while adjusting the Speed to RPM parameter.
See the Distance Since Stopped variable (below).
Vehicle Speed
Vehicle_Speed
0x37DD 0x00
–3276.8 – 3276.7
–32768 – 32767
Read Only Vehicle speed in units of MPH or KPH depending on the setting of
the Metric Units parameter.
Vehicle Odometer
Vehicle_Odometer
0x37DA 0x00
0.0 – 10000000.0
0 – 100000000
Read Only Vehicle distance traveled, in units of miles or km, depending
on the setting of the Metric Units parameter in the Vehicle
parameters menu. For accurate distance measurements, the
Speed to RPM parameter must be set correctly.
DUAL DRIVE
See the Dual Drive Supplement manual: 53231_F-Series Dual Drive RevA (or newer).

Curtis Instruments AC F4-A Specifications

General

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