RX Quick Start Guide
20 RX Quick Start Guide
3.8 Ramps adjustment
The basic frequency (speed) profile is defined by parameters con-
tained in the "F" Group as shown to the right. The set running fre-
quency is in Hz, but acceleration and deceleration are specified in
the time duration of the ramp (from zero to maximum frequency,
or from maximum frequency to zero).
Acceleration 1 and Deceleration 1 are the standard default accel
and decel values for the main profile. Accel and decel values for an
alternative profile are specified by using parameters A092 through
A093.
Acceleration and deceleration can be set via Drive programming as
well via parameter P031
Standard acceleration and deceleration is linear. The inverter CPU can
also calculate an S-curve acceleration or deceleration curve as shown.
These profiles are useful for favoring the load characteristics in partic-
ular applications, like for example the U-curve for deceleration of big
inertial load. Even if the shape of the ramps change the time keeps
being the same one set in F002/F003
Curve settings for acceleration and deceleration are independently
selected. To enable the S-curve, use function A097 (acceleration) and
A098 (deceleration).
Parameter Parameter Name Description
A004 Maximum frequency A003 to 400
b082 Starting frequency 0.10 to 9.99 Hz
F001 Output frequency setting/monitor 0.00 to 400.00 Hz
F002 Acceleration time 1 0.01 to 3600.00 s
F003 Deceleration time 1 0.01 to 3600.00 s
P031 Acceleration/Deceleration time input
type
00: OPE (Digital operator)
01: Option 1
02: Option 2
03: EzSQ (Drive Programming)
Parameter Parameter Name Description
A097 Acceleration pattern selection 00: Line
01: S-curve
02: U-curve
03: Inverse U-curve
04: EL-S curve
A098 Deceleration pattern selection
A131 Acceleration curve parameter 01 (small curve) to 10 (large curve)
A132 Deceleration curve parameter 01 (small curve) to 10 (large curve)
A150 EL-S-curve ratio 1 during acceleration 0 to 50%
A151 EL-S-curve ratio 2 during acceleration 0 to 50%
A152 EL-S-curve ratio 1 during deceleration 0 to 50%
A153 EL-S-curve ratio 2 during deceleration 0 to 50%
0
t
F002
Actual accel. time
Actual decel. time
Output
frequency
F003
A004
F001
b082
Accel. curve selection
S-curve
Linear
t
0
Acceleration period
Target
freq.
Output
frequency
A097=01
A097=00
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