ABB ACS800 Series - Speed Control

Actual signals and parameters
85
22.07 E-STOP RAMP TIME Defines the time inside which the drive is stopped if the drive receives
an emergency stop command.
The emergency stop command can be given through a fieldbus or an
Emergency Stop module (optional). Consult the local ABB
representative for more information on the optional module and the
related settings of the Standard Control Program.
0.0…1000.0 s Deceleration time. 10 = 1 s
22.08 VARIABLE SLOPE Variable slope is used to smooth the speed reference step changes
from an overriding controller. If the overriding controller is generating
the ramped speed reference to the drive (not using the internal drive
ramp), the cycle time of the controller may cause the reference to be
“stepped” instead of smooth. When the drive sees a speed step, it
responds with a torque step that may upset the process. To
compensate for the stepped reference, the drive can ramp the
reference from the current to the new step, using the 22.09 VAR
SLOPE RATE as the time.
Note: Visible only after entering proper code in 16.03 PASS CODE.
NO Variable slope is not active. 0
YES Variable slope is active. 65535
22.09 VAR SLOPE RATE Cycle time of the overriding controller.
Note: Visible only after entering proper code in 16.03 PASS CODE.
10.0…1000.0 ms Setting range. 10 = 1 ms
22.10 CNSTSPD (JOG) RAMP Ramp time for constant speeds.
Note: This only applies when 12.08 CNST SPD RUN SEL is set to
STRT W/CNST.
0.0…1000.0 s Setting range. 10 = 1 s
23 SPEED CONTROL
Speed controller variables. See section Speed controller tuning on
page 36.
23.01 GAIN Defines a relative gain for the speed controller. Great gain may cause
speed oscillation.
The figure below shows the speed controller output after an error step
when the error remains constant.
Note: The gain shown here is a calculated value based on
23.20 P-GAIN AT MIN and 23.21 P-GAIN AT MAX.
0.0…250.0 Gain. 100 = 1
No. Name/Value Description FbEq
Gain = K
p
= 1
T
I
= Integration time = 0
T
D
= Derivation time = 0
Controller
Error Value
Controller Output
t
%
e = Error value
output = K
p
· e