Curtis 1244 User Manual page 32

3 — PROGRAMMABLE PARAMETERS:
Acceleration Parameters
26
Acceleration Parameters
M1–M4, ACCEL RATE
The acceleration rate defines the time it takes the controller to accelerate from
0% output to 100% output. A larger value represents a longer acceleration
time and a gentler start. Fast starts can be achieved by reducing the acceleration
time, i.e., by adjusting the accel rate to a smaller value. The acceleration rate is
adjustable from 0.1 second to 5.0 seconds, in 0.1 second increments. It can be
set independently for each of the four operating modes.
M1–M4, BRAKE RATE
The braking rate defines the time it takes the controller to increase from 0%
regen braking current to 100% regen braking current when braking is requested.
A larger value represents a longer time and therefore a gentler increase in braking
strength. Full braking strength is achieved more quickly when the braking rate
parameter value is reduced. The braking rate is adjustable from 0.1 second to
5.0 seconds, in 0.1 second increments, and can be set independently for each
of the four operating modes.
DECEL RATE
The deceleration rate defines the time it takes the controller output to respond
to a decrease in applied throttle. The deceleration rate defines the vehicle's braking
characteristic for any reduction in throttle, including to neutral, that does not
include a request for the opposite direction. It also defines the characteristic for
braking after Emergency Reverse is released. The decel rate is adjustable from 0
to 10 seconds, in 0.1 second increments. The decel rate works in conjunction
with the throttle braking percent parameter, which must be set greater than zero
for the programmed decel rate to be active. The decel rate is not a MultiMode™
parameter, and its value will therefore affect all four operating modes.
QUICK START
The quick start function provides faster than normal acceleration in response to
fast changes in throttle demand. Upon receiving a sudden high throttle demand
from neutral, the quick start function causes the controller to exceed its normal
acceleration rate. The quick start algorithm is applied each time the throttle
passes through neutral and the controller is not in braking mode. Quick start
is adjustable from 0 to 10, in increments of 1. Increasing the value "livens" the
vehicle's acceleration response to fast throttle movements.
Curtis 1244 Manual,
Rev. E