ABB ACS850 - Page 180

180 Parameters
0.0 … 1000.0 ms Speed error filtering time constant. 0 = filtering disabled. 10 = 1 ms
23.08 Speed additive Defines a speed reference to be added after ramping.
Note: For safety reasons, the additive is not applied when
stop functions are active.
Zero Zero speed additive. 0
AI1 scaled 02.05 AI1 scaled (see page 105). 1073742341
AI2 scaled 02.07 AI2 scaled (see page 105). 1073742343
FBA ref1 02.26 FBA main ref1 (see page 109). 1073742362
FBA ref2 02.27 FBA main ref2 (see page 109). 1073742363
D2D ref1 02.32 D2D ref1 (see page 110). 1073742368
D2D ref2 02.33 D2D ref2 (see page 110). 1073742369
PID out 04.05 Process PID out (see page 115). 1073742853
Pointer Value pointer setting (see Terms and abbreviations on page
102).
-
23.09 Max torq sp ctrl Defines the maximum speed controller output torque.
-1600.0 … 1600.0% Maximum speed controller output torque. 10 = 1%
23.10 Min torq sp ctrl Defines the minimum speed controller output torque.
-1600.0 … 1600.0% Minimum speed controller output torque. 10 = 1%
23.11 SpeedErr winFunc 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 hi), or
• the absolute value of the negative speed error exceeds the
lower boundary of the window (23.13 SpeedErr win lo).
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) which the torque selector
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.
Disabled Speed error window control inactive. 0
Absolute Speed error window control active. The boundaries defined
by parameters 23.12 SpeedErr win hi and 23.13
SpeedErr
win lo are absolute.
1
Relative Speed error window control active. The boundaries defined
by parameters 23.12 SpeedErr win hi and 23.13 SpeedErr
win lo are relative to speed reference.
2
23.12 SpeedErr win hi Defines the upper boundary of the speed error window.
Depending on setting of parameter 23.11 SpeedErr winFunc,
this is either an absolute value or relative to speed reference.
0 … 3000 rpm Upper boundary of speed error window. 1 = 1 rpm
No. Name/Value Description FbEq