ABB ACS550-01 User Manual page 77

ACS550 User's Manual
Code Description
2304 ACC COMPENSATION
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 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.
No Acceleration Compensation
%
Acceleration Compensation
%
t
Speed reference
Actual speed
t
Start-Up
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