Specifications

Curtis PMC 1223/33, 1225/35, 1227/37 Manual
39
3 — PROGRAMMABLE PARAMETERS
Changing either the maximum speed setting or the creep speed setting
changes the output range of the controller. Ramp shape output is always a
percentage of the output range (the range between the creep speed and maximum
speed settings).
Ramp shapes with the creep speed setting raised from zero to 10% are shown
in Figure 23.
In Figure 24, the creep speed is kept at 10% and the maximum speed setting
is dropped from 100% to 60%.
THROTTLE (percent)
PWM (percent)
70%
60%
50%
40%
30%
20%
RAMP SHAPE
100
90
80
70
60
50
40
30
20
10
0
100908070605040302010 0
CREEP SPEED (10%)
MAXIMUM SPEED (100%)
Fig. 23 Ramp shape
(throttle map) for control-
ler with maximum speed
set at 100% and creep
speed set at 10%.
THROTTLE (percent)
PWM (percent)
70%
60%
50%
40%
30%
20%
RAMP SHAPE
100
90
80
70
60
50
40
30
20
10
0
100908070605040302010 0
CREEP SPEED
(10%)
MAXIMUM SPEED
(60%)
Fig. 24 Ramp shape
(throttle map) for control-
ler with maximum speed
set at 60% and creep speed
set at 10%.
In all cases, the ramp shape number is the PWM output at half throttle, as a
percentage of its full range. In Figure 24, for example, the 50% ramp shape gives