ABB ACS880-01-430A-3+N5350 - Speed Controller Settings

12-64 Startup Assistant & Parameters 3AXD50000011888
Table 12-4 Level 1 Parameter Block Definitions
Block Title
Parameter (Number)
Selection (Value)
Descriptions
SPEED
REFERENCE
RAMP
(Continued)
ACCELERATION TIME 2
(23.14)
Default: s = Motor Nom Spd/10
Range: 0.000 - 1800.000s
Denes acceleration time 2. See parameter 23.12 Acceleration time 1.
DECELERATION TIME 2
(23.15)
Default: 60s
Range: 0.000 - 1800.000s
Denes deceleration time 2. See parameter 23.13 Deceleration time 1.
Speed error calculation; speed error window control conguration; speed error step.
See the control chain diagrams.
USED SPEED REFERENCE
(24.01)
Default: Read Only
Range: -30000.00 to +30000.00 RPM
Displays the ramped and corrected speed reference (before speed
error calculation). See the control chain diagram.
This parameter is read-only.
USED SPEED FEEDBACK
(24.02)
Default: Read Only
Range: -30000.00 to +30000.00 RPM
Displays the speed feedback used for speed error calculation. See the
control chain diagram.
This parameter is read-only.
SPEED CONTROL Speed controller settings. See the control chain diagrams.
USED SPEED FEEDBACK
(25.01)
Default: Read Only
Range: -1600.0 to +1600.0%
Displays the speed controller output that is transferred to the torque
controller. See the control chain diagram.
This parameter is read-only.
SPEED PROPORTIONAL
GAIN (25.02)
Default: 0.50
Range: 0.00 - 250.00
Denes the proportional gain (Kp) of the speed controller. Too high a
gain may cause speed oscillation. The gure below shows the speed
controller output after anerror step when the error remains constant.
Gain = K
p
= 1
T
I
= Integration time = 0
T
D
= Derivation time = 0
%
Controller
output = K
p
× e
Time
e = Error value
Controller output
Error value
If gain is set to 1, a 10% change in error value (reference - actual value)
causes the speed controller output to change by 10%, ie. the output value
is input × gain.