ABB RCNA-01 User Manual Page 232

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228 Parameter listing and descriptions
ACH550-01 User's Manual
2304 ACC COMPENSATION 0…600.00 s
Sets the derivation time for acceleration compensation.
Adding a derivative of the reference to the output of the speed
controller compensates for inertia during acceleration.
2303
DERIVATION TIME describes the principle of the derivative action.
Rule of thumb: Set this parameter between 50 and 100% of the sum
of the mechanical time constants for the motor and the driven
machine.
The figure shows the speed responses when a high-inertia load is
accelerated along a ramp.
Code Description Range
No acceleration compensation
%
t
Speed reference
Actual speed
%
Acceleration compensation
t
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