PROGRAMMING GUIDE
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12. RAMPS MENU
12.1. Overview
An acceleration/deceleration ramp is a function allowing linear variations of the motor speed.
The ramp time is the time the motor takes to reach its max. speed when it starts from zero speed (or the time the motor
takes to reach 0 speed when decelerating).
Four pairs of programmable values are available. Each pair defines the motor acceleration time and deceleration time.
The unit of measure of the basic time period is assigned to each pair of values.
In the Ramps menu, you can set the acceleration and deceleration times for the four speed ramps available for ordinary
operation, for the torque ramp and the speed/torque ramp in JOG mode.
Using two special parameters, you can also set the start rounding off and the end rounding off for the acceleration
ramps, while two different parameters allow setting the start rounding off and the end rounding off for the deceleration
ramps. A fifth parameter allows selecting the ramps for the preset rounding off.
12.1.1. DESCRIPTION OF THE SPEED RAMPS
For the four speed ramps that can be selected through a combination of the digital inputs set in C167 and C168, you
can set the following: acceleration time, deceleration time and their units of measure, allowing increasing the
programmable time range.
P009 Ramp Up Time 1
P010 Ramp Down Time 1
P012 Ramp Up Time 2
P013 Ramp Down Time 2
P014 Unit of Measure for Ramp Times 1 and 2
P015 Ramp Up Time 3
P016 Ramp Down Time 3
P018 Ramp Up Time 4
P019 Ramp Down Time 4
P020 Unit of Measure for Ramp Times 3 and 4
The set ramp time corresponds to the time the speed reference takes to reach the max. speed (from 0 rpm) as an
absolute value between min. speed and max. speed of the selected motor (C028 and C029 for motor 1, and so on). The
time unit of measure may have the following values:
0 → 0.01 s
1 → 0.1 s
2 → 1 s
3 → 10 s
The programmable range may be 0s – 327000s.
Example of a speed ramp:
Table 23: Example of a Speed Ramp
1 0.1 s 0 3270.0 s
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