ABB ACS560, Firmware Manual

Page: 228 / 514

228 Parameters
23.23 Emergency stop
time Defines the time inside which the drive is stopped if an
emergency stop Off3 is activated (ie. the time required for the
speed to change from the speed value defined by parameter
46.01 Speed scaling or 46.02 Frequency scaling to zero).
Emergency stop mode and activation source are selected by
parameters
21.04 Emergency stop mode and 21.05
Emergency stop source respectively. Emergency stop can
also be activated through fieldbus.
Note:
• Emergency stop Off1 uses the standard deceleration ramp
as defined by parameters 23.11 … 23.1523.12 … 23.13 .
• The same parameter value is also used in frequency
control mode (ramp parameters
28.71 … 28.7528.72 … 28.73 ).
3.000
0.000…1800.000 s Emergency stop Off3 deceleration time. 10 = 1
23.28 Variable slope Activates the variable slope function, which controls the slope
of the speed ramp during a speed reference change. This
allows for a constantly variable ramp rate to be generated,
instead of just the standard two ramps normally available.
If the update interval of the signal from an external control
system and the variable slope rate (
23.29 Variable slope rate )
are equal, speed reference ( 23.02 Speed ref ramp output ) is
a straight line.
This function is only active in remote external control.
Off
Off Variable slope disabled. 0
On Variable slope enabled (not available in local control). 1
23.29 Variable slope rate Defines the rate of the speed reference change when variable
slope is enabled by parameter
23.28 Variable slope .
For the best result, enter the reference update interval into
this parameter.
50
2…30000 ms Variable slope rate. 1 = 1
No. Name/Value Description Def/FbEq16
t
Speed
reference
23.02 Speed ref ramp output
Speed reference
Time
A
t = update interval of signal from an external control system
A = speed reference change during t