ABB ACS550-02 User Manual page 101

Group 22: Accel/Decel
This group defines ramps that control the rate of acceleration and deceleration. You
define these ramps as a pair, one for acceleration and one for deceleration. You can
define two pairs of ramps and use a digital input to select one or the other pair.
Code Description
2201 ACC/DEC 1/2 SEL
Defines control for selection of acceleration/deceleration ramps.
• Ramps are defined in pairs, one each for acceleration and deceleration.
• See below for the ramp definition parameters.
0 = – Disables selection, the first ramp pair is used.
NOT SEL
1 = 1 – Defines digital input
DI
• Activating the digital input selects ramp pair 2.
• De-activating the digital input selects ramp pair 1.
2...6 = 2... 6 – Defines digital input
DI DI
• See 1 above.
DI
-1 = 1( ) – Defines an inverted digital input
DI INV
• De-activating the digital input selects ramp pair 2
• Activating the digital input selects ramp pair 1.
-2...-6 = 2( )... 6(
DI INV DI
• See 1( ) above.
DI INV
2202 ACCELER TIME 1
Sets the acceleration time for zero to maximum frequency for ramp pair 1. See A in
figure.
• Actual acceleration time also depends on 2204
• See 2008
MAXIMUM FREQUENCY
2203 DECELER TIME 1
Sets the deceleration time for maximum frequency to zero for ramp pair 1.
• Actual deceleration time also depends on 2204
• See 2008
MAXIMUM FREQUENCY
2204 RAMP SHAPE 1
Selects the shape of the acceleration/deceleration ramp for ramp pair 1. See B in
figure.
• Shape is defined as a ramp, unless additional time is specified here to reach the
maximum frequency. A longer time provides a softer transition at each end of the
slope. The shape becomes an s-curve.
• Rule of thumb: 1/5 is a suitable relation between the ramp shape time and the
acceleration ramp time.
0.0 = – Specifies linear acceleration/deceleration ramps for ramp pair 1.
LINEAR
0.1...1000.0 = -
S CURVE
ramp pair 1.
2205 ACCELER TIME 2
Sets the acceleration time (s) for zero to maximum frequency for ramp pair 2. See 2002
2206 DECELER TIME 2
Sets the deceleration time for maximum frequency to zero for ramp pair 2. See 2003
2207 RAMP SHAPE 2
Selects the shape of the acceleration/deceleration ramp for ramp pair 2. See 2004
2208 EM DEC TIME
Sets the deceleration time for maximum frequency to zero for an emergency.
• See parameter 2109
• Ramp is linear.
1 as the control for ramp pair selection.
DI
2... 6 as the control for ramp pair selection.
DI DI
1 as the control for ramp pair selection.
DI
) – Defines an inverted digital input
INV
.
.
– Specifies s-curve acceleration/deceleration ramps for
.
EM STOP SEL
2... 6 as the control for ramp pair selection.
DI DI
.
RAMP SHAPE
.
RAMP SHAPE
MAX
Linear
FREQ
B (=0)
MAX
S-curve
FREQ
B
A
A = 2202
ACCELERATION TIME
B = 2204
RAMP SHAPE
1.
ACCELER TIME
1.
DECELER TIME
1.
RAMP SHAPE
Start-Up
99
T
T