Group 22: Accel/Decel - ABB ACS550 User Manual

ACS550 User's Manual

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
7 = – Defines bit 10 of the Command Word 1 as the control for ramp pair selection.
COMM
• The Command Word is supplied through fieldbus communication.
• The Command Word is parameter 0301.
-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( )...
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
the figure.
• Actual acceleration time also depends on 2204
• See 2008
MAXIMUM FREQ
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 FREQ
2204 RAMP SHAPE 1
Selects the shape of the acceleration/deceleration ramp for ramp pair 1. See B in
the 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 for zero to maximum frequency for ramp pair 2.
• See 2202
ACCELER TIME
• Used also as jogging acceleration time. See 1004
2206 DECELER TIME 2
Sets the deceleration time for maximum frequency to zero for ramp pair 2.
• See 2203
DECELER TIME
• Used also as jogging deceleration time. See 1004
2207 RAMP SHAPE 2
Selects the shape of the acceleration/deceleration ramp for ramp pair 2.
• See 2204
RAMP SHAPE
1 as the control for ramp pair selection.
DI
2... 6 as the control for ramp pair selection.
DI DI
6( ) – Defines an inverted digital input
INV
.
.
– Specifies s-curve acceleration/deceleration ramps for
1.
1.
1.
1 as the control for ramp pair selection.
DI
2... 6 as the control for ramp pair selection.
DI DI
1.
RAMP SHAPE
1.
RAMP SHAPE
.
JOGGING SEL
.
JOGGING SEL
MAX Linear
FREQ
B (=0)
MAX
S-curve
FREQ
B
A
A = 2202 1
ACCELER TIME
B = 2204 1
RAMP SHAPE
Parameters
131
T
T