Curtis 1244 - Fig. 15: Effect of Adjusting the Throttle Max Parameter

32
Curtis 1244 Manual, Rev. E
3 — PROGRAMMABLE PARAMETERS: Throttle Parameters
ThROTTLE MAx
e throttle max parameter sets the wiper voltage required to produce 100%
controller output. Decreasing the throttle max setting reduces the wiper voltage
and therefore the full stroke necessary to produce full controller output. is
feature allows reduced-range throttle assemblies to be accommodated.
Examples are shown in Figure 15 for throttle types 1 through 4, using a
nominal 5kΩ potentiometer. ese examples illustrate the eect of three dif-
ferent throttle max settings (100%, 90%, 60%) on the full-stroke wiper voltage
required to attain 100% controller output.
Fig. 15 Eect of adjusting
the throttle max parameter
(rottle Types 1 and 2).
0–5kΩ Throttle: Type 3
0–5V Single-Ended Throttle: Type 2
5kΩ–0 Throttle: Type 1
0–5V Wigwag Throttle: Type 4
0
5V
1.2V
(1.4kΩ)
3.3V
(5.0kΩ)
100% Throttle Max
30% Deadband
0.5V
(400Ω)
2.7V
(3.9kΩ)
3.0V
(4.5kΩ)
90% Throttle Max
30% Deadband
90% Throttle Max
10% Deadband
60% Throttle Max
10% Deadband
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.
KEY
100%
Throttle
Deadband
Controller
Output
0%
0
5V
2.0V
100% Throttle Max
30% Deadband
0.2V
4.5V
0.2V
3.0V
2.0V
4.5V
90% Throttle Max
30% Deadband
90% Throttle Max
10% Deadband
60% Throttle Max
10% Deadband
0
5V
2.3V
(3.2kΩ)
0.2V
(0Ω)
100% Throttle Max
30% Deadband
3.0V
(4.5kΩ)
1.7V
(2.2kΩ)
0.6V
(450Ω)
90% Throttle Max
30% Deadband
90% Throttle Max
10% Deadband
60% Throttle Max
10% Deadband
0.6V
(450Ω)
2.3V
(3.2kΩ)
3.0V
(4.5kΩ)
1.2V
(1.4kΩ)
0.5V
(400Ω)
3.0V
(4.5kΩ)
0
5V
100% Throttle Max
30% Deadband
90% Throttle Max
30% Deadband
90% Throttle Max
10% Deadband
60% Throttle Max
10% Deadband
3.7V
(3.7kΩ)
4.5V
(4.5kΩ)
0.5V
(500Ω)
1.3V
(1.3kΩ)
3.7V
(3.7kΩ)
4.3V
(4.3kΩ)
0.7V
(700Ω)
1.3V
1.3kΩ)
2.9V
(2.9kΩ)
4.3V
(4.3kΩ)
0.7V
(700Ω)
2.1V
(2.1kΩ)
2.9V
(2.9kΩ)
3.7V
(3.7kΩ)
1.3V
(1.3kΩ)
2.1V
(2.1kΩ)