28 Speed Control - ABB ACSM1 Firmware Manual

28

28 SPEED CONTROL

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 i.e. signal
SPEED ERROR FILT, which is the output of the
Note: This parameter has been locked, i.e. 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%.
0...200
SPEED CONTROL
TLF3 250 μsec
SPEED ERROR FILT
< 28.01 SPEED ERR NCTRL
(7 / 3.06)
[ 10.00 ]
28.02 PROPORT GAIN
[ 0.500 s ]
28.03 INTEGRATION TIME
[ 0.000 s ]
28.04 DERIVATION TIME
[ 8.0 ms ]
28.05 DERIV FILT TIME
ACC COMP TORQ
< 28.06 ACC COMPENSATION
(7 / 3.07)
[ 0.00 % ]
28.07 DROOPING RATE
[ 0.0 % ]
28.08 BAL REFERENCE
[ FALSE ]
< 28.09 SPEEDCTRL BAL EN
[ -300.0 % ]
28.10 MIN TORQ SP CTRL
[ 300.0 % ]
28.11 MAX TORQ SP CTRL
[ 0 rpm ]
28.12 PI ADAPT MAX SPD
[ 0 rpm ]
28.13 PI ADAPT MIN SPD
[ 1.000 ]
28.14 P GAIN ADPT COEF
[ 1.000 ]
28.15 I TIME ADPT COEF
3.08 TORQ REF SP CTRL
FW block: SPEED CONTROL
SPEED ERROR
FW block: SPEED CONTROL
) of the speed controller. Too great a gain may cause speed
p
Gain = K = 1
p
T = Integration time = 0
I
T = Derivation time = 0
D
Error value
Controller output
e = Error value
Proportional gain for speed controller.
7
(3)
3.08 TORQ REF SP CTRL
(page 63)
(see above)
firmware block.
(see above)
t
Parameters and firmware blocks
117
3.06