Speed Control - ABB ACSM1 Firmware Manual

28
Firmware block:

SPEED CONTROL

(28)
This block
• selects the source for speed error
• adjusts PID-type speed controller
variables
• defines limits for speed controller
output torque
• selects the source for acceleration
compensation torque
• configures the balancing function
which forces the output of the
speed controller to an external
value
• configures the drooping function
(adjustment of load sharing in a
Master/Follower application)
• shows the limited speed controller
output torque value.
Block outputs located in other
parameter groups
28.01 SPEED ERR NCTRL
Selects the source for the speed error (reference - actual). The default value is P.3.6, ie, parameter
3.06 SPEED ERROR
Note: This parameter has been locked, ie, no user setting is possible.
Value pointer: Group and index
28.02 PROPORT GAIN
Defines the proportional gain (K
oscillation. The figure below shows the speed controller output after an error step when the error
remains constant.
Controller output
= K × e
p
If gain is set to 1, a 10% change in error value (reference - actual value) causes the speed controller
output to change by 10%.
Note: This parameter is automatically set by the speed controller autotune function. See parameter
28.16 PI TUNE MODE.
0...200
3.08 TORQ REF SP CTRL
FW block: SPEED CONTROL
FILT, which is the output of the
FW block: SPEED CONTROL
) of the speed controller. Too large a gain may cause speed
p
%
Gain = K
T = Integration time = 0
I
T = Derivation time = 0
D
Error value
Controller output
Proportional gain for speed controller.
SPEED CONTROL
(page 74)
(see above)
SPEED ERROR firmware block.
(see above)
= 1
p
e = Error value
t
Parameters and firmware blocks
135