Speed Control - ABB ACS355 series User Manual

236 Actual signals and parameters
All parameters
No. Name/Value
COMM
DI1(INV)
DI2(INV)
DI3(INV)
DI4(INV)
DI5(INV)
23 SPEED
CONTROL
2301 PROP GAIN
0.00...200.00
Description
Defines bit 13 of Command word 1 as the control for forcing
the speed to zero. The Command word 1 is supplied
through fieldbus communication (parameter 0301).
Inverted digital input DI1. Defines inverted digital input
as the control for forcing the speed to zero.
• De-activating the digital input forces the speed to zero.
• Activating the digital input: speed control resumes normal
operation.
See selection DI1(INV).
See selection DI1(INV).
See selection DI1(INV).
See selection DI1(INV).
Speed controller variables. See section
tuning on page 144.
Note: These parameters do not affect drive operation in
scalar control, ie, when parameter
MODE setting is SCALAR:
Defines a relative gain for the speed controller. High gain
may cause speed oscillation.
The figure below shows the speed controller output after an
error step when the error remains constant.
%
Error
value
Controller
output =
K · e
p
Note: For automatic setting of the gain, use autotune run
(parameter 2305 AUTOTUNE
Gain
Speed controller
9904 MOTOR CTRL
FREQ.
Gain = K = 1
p
T = Integration time = 0
I
T = Derivation time = 0
D
Controller output
RUN).
Def/FbEq
7
1 -1
DI
-2
-3
-4
-5
5.00
e = Error
value
t
1 = 0.01