Curtis 1244 - Fig. 14: Effect of Adjusting the Neutral Deadband Parameter

30
Curtis 1244 Manual, Rev. E
ThRTL DEADBAND
e throttle deadband parameter defines the throttle pot wiper voltage range
the controller interprets as neutral. Increasing the throttle deadband setting
increases the neutral range. is parameter is especially useful with throttle
assemblies that do not reliably return to a well-defined neutral point, because
it allows the deadband to be defined wide enough to ensure that the controller
goes into neutral when the throttle mechanism is released.
Examples of deadband settings (30%, 10%, 0%) are shown in Figure 14
for throttle types 1 through 4, using a nominal 5kΩ–0 potentiometer. (For
throttle type 5, see the Curtis CAN Protocol Document.)
Fig. 14 Eect of
adjusting the throttle
deadband parameter
(rottle Types 1 and 2).
3 — PROGRAMMABLE PARAMETERS: Throttle Parameters
0–5kΩ Throttle: Type 3
0–5V Single-Ended Throttle: Type 2
5kΩ–0 Throttle: Type 1
0–5V Wigwag Throttle: Type 4
5V
0
0.2V
(0Ω)
30% Deadband
10% Deadband
0% Deadband
0.6V
(450Ω)
1.2V
(1.4kΩ)
Notes: Voltages shown are at the pot wiper relative to B-.
For throttle types 1 and 3, the deadband points are
defined in terms of the nominal 5kΩ pot resistance.
Using a pot of greater or lesser resistance will give
different values for the deadband points.
Throttle Max parameter set at 100%.
3.3V
(5.0kΩ)
5V
0
0.2V
30% Deadband
10% Deadband
0% Deadband
0.5V
2.0V
5V
0
3.3V
(5.0kΩ)
30% Deadband
10% Deadband
0% Deadband
3.0V
(4.5kΩ)
2.3V
(3.2kΩ)
0.2V
(0Ω)
3.3V
(5.0kΩ)
3.3V
(5.0kΩ)
0.2V
(0Ω)
0.2V
(0Ω)
KEY
100%
Throttle
Deadband
Controller
Output
0%
5V
0
0.5V
(500Ω)
30% Deadband
10% Deadband
0% Deadband
2.9V
(2.9kΩ)
3.7V
(3.7kΩ)
4.5V
(4.5kΩ)
4.5V
(4.5kΩ)
4.5V
(4.5kΩ)
2.5V
(2.5kΩ)
0.5V
(500Ω)
0.5V
(500Ω)
2.1V
(2.1kΩ)
1.3V
(1.3kΩ)