ABB ACS850 Firmware Manual page 132

132 Parameters
No. Name/Value
23.08 Speed additive
Zero
AI1 scaled
AI2 scaled
FBA ref1
FBA ref2
D2D ref1
D2D ref2
PID out
Pointer
23.09 Max torq sp ctrl
-1600.0 ... 1600.0% Maximum speed controller output torque.
23.10 Min torq sp ctrl
-1600.0 ... 1600.0% Minimum speed controller output torque.
23.11 SpeedErr winFunc
Disabled
Absolute
Relative
23.12 SpeedErr win hi
0 ... 3000 rpm
Description
Defines a speed reference to be added after ramping.
Note: For safety reasons, the additive is not applied when
stop functions are active.
Zero speed additive.
02.05 AI1 scaled (see page 65).
02.07 AI2 scaled (see page 65).
02.26 FBA main ref1 (see page 70).
02.27 FBA main ref2 (see page 70).
02.32 D2D ref1 (see page 71).
02.33 D2D ref2 (see page 71).
04.05 Process PID out (see page 72).
Value pointer setting (see
63).
Defines the maximum speed controller output torque.
Defines the minimum speed controller output torque.
Enables or disables speed error window control.
Speed error window control forms a speed supervision
function for a torque-controlled drive. It supervises the speed
error value (speed reference – actual speed). In the normal
operating range, window control keeps the speed controller
input at zero. The speed controller is evoked only if
• the speed error exceeds the upper boundary of the window
(parameter 23.12 SpeedErr win
• the absolute value of the negative speed error exceeds the
lower boundary of the window
When the speed error moves outside the window, the
exceeding part of the error value is connected to the speed
controller. The speed controller produces a reference term
relative to the input and gain of the speed controller
(parameter 23.01 Proport gain)
adds to the torque reference. The result is used as the
internal torque reference for the drive.
Example: In a load loss condition, the internal torque
reference of the drive is decreased to prevent an excessive
rise of the motor speed. If window control were inactive, the
motor speed would rise until a speed limit of the drive were
reached.
Speed error window control inactive.
Speed error window control active. The boundaries defined
by parameters 23.12 SpeedErr win hi
win lo are absolute.
Speed error window control active. The boundaries defined
by parameters 23.12 SpeedErr win hi
win lo are relative to speed reference.
Defines the upper boundary of the speed error window.
Depending on setting of parameter
this is either an absolute value or relative to speed reference.
Upper boundary of speed error window.
Terms and abbreviations
hi), or
(23.13 SpeedErr win
which the torque selector
and 23.13 SpeedErr
and 23.13 SpeedErr
23.11 SpeedErr
FbEq
0
1073742341
1073742343
1073742362
1073742363
1073742368
1073742369
1073742853
on page -
10 = 1%
10 = 1%
lo).
0
1
2
winFunc,
1 = 1 rpm