ABB ACS880 Firmware Manual page 129

No. Name/Value
25.06 Acc comp
derivation time
0.00 ... 1000.00 s
25.07 Acc comp filter time
0.0 ... 1000.0 ms
Description
Defines the derivation time for acceleration(/deceleration)
compensation. In order to compensate inertia during
acceleration, a derivative of the reference is added to the
output of the speed controller. The principle of a derivative
action is described under parameter
Note: As a general rule, set this parameter to the value
between 50 and 100% of the sum of the mechanical time
constants of the motor and the driven machine.
The figure below shows the speed responses when a high
inertia load is accelerated along a ramp.
No acceleration compensation:
Acceleration compensation:
Acceleration compensation derivation time.
Defines the acceleration (or deceleration) compensation filter
time constant.. See parameters
25.06 Acc comp derivation time.
Acceleration/deceleration compensation filter time.
Parameters 129
25.04 Derivation time.
Speed reference
Actual speed
Time
Speed reference
Actual speed
Time
25.04 Derivation time and
Def/FbEq16
0.00 s
10 = 1 s
8.0 ms
1 = 1 ms