212 Parameters
Speed error window
control enable
Enables/disables (or selects a source that
enables/disables) speed error window control, sometimes
also referred to as deadband control or strip break
protection. It forms a speed supervision function for a
torque-controlled drive, preventing the motor from running
away if the material that is being held under tension
breaks.
Note
: Speed error window control is only effective when
the operating mode is active (see parameters
), or when the drive is a speed-controlled follower
(see page
If the motor load is lost, then the motor speed rises. The
speed error (speed reference - actual speed) increases
until it exits the speed error window. When this is detected,
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 (
)
.
The activation of speed error window control is indicated
by bit 3 of
The window boundaries are defined by
as
follows:
(rather than
) defines the
overspeed limit in both directions of rotation. This is
because the function monitors speed error (which is
negative in case of overspeed, positive in case of
underspeed).
0 = Speed error window control disabled
1 = Speed error window control enabled
Disable
0.
0
Enable
1.
1
Source selection (see
on
page
-
No.
Name/Value
Description
Def/
FbEq16
Speed (rpm)
0 rpm
Ref [
] rpm
Reference
Reference - [
] rpm
Ref [
] rpm
Reference
Reference - [
] rpm
Speed error
window
Speed error
window
Forward
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Summary of Contents for ACS880 PCP
Page 1: ...ABB industrial drives Firmware manual ACS880 PCP ESP control program ...
Page 4: ......
Page 28: ...28 PCP ESP control start up ...
Page 30: ...30 Using the control panel ...
Page 94: ...94 Standard programposi features ...
Page 100: ...100 Default control connections ...
Page 360: ...360 Parameters ...
Page 436: ...436 Fault tracing ...
Page 486: ...486 Control chain diagrams ...
Page 492: ...492 Appendix ESP with step up transformer and sine filter ...
Page 494: ...Contact us www abb com drives www abb com drivespartners 3AXD50000016186 Rev B EN 2015 10 27 ...