Amtech Axpert-Eazy Series - Page 98

Amtech
6-52
6
A202: Deceleration Time-1 (Sec)
Deceleration Time-1 is the time taken by AC DRIVE output frequency to ramp down from maximum
frequency A103 to zero frequency.
Short deceleration time can result in excessive output current and if it exceeds the stall current limit
B301, the deceleration will cease until the current reduces below the B301 value. In such case, the
actual deceleration time will differ from programmed value. The AC DRIVE may trip in over current /
dc bus over voltage fault if the condition persists for long time. Increase deceleration time in such
cases.
A203: Acceleration Time-2 (Sec)
A204: Deceleration Time-2 (Sec)
The Acceleration Time-2 and Deceleration Time-2 can be selected in place of Acceleration Time-1
and Deceleration Time-1. This is valid only if Ramp Select input is ON. Acceleration Time-2 is the
time taken by AC DRIVE output frequency to ramp up from zero frequency to maximum frequency
A103.
Deceleration Time-2 is the time taken by AC DRIVE output frequency to ramp down from maximum
frequency A103 to zero frequency.
Acceleration
Time-1 (A201)
Deceleration
Time-2 (A204)
Deceleration
Time-1 (A202)
Max. Frequency (A103)
F
t
Ramp Select
ON
Ramp Select = ON
Ramp Select = OFF
A205: S-Curve Selection
A206: S-Curve Time-1 (Sec)
A207: S-Curve Time-2 (Sec)
Acceleration/deceleration with the S-shape pattern is possible by setting parameter A205=1. The
higher the S-curve time period, the more pronounced is the S-shape.
The total acceleration / deceleration times will not change.
When this parameter is set, all acceleration and deceleration will be as shown in below fig.
Note: Set so that the relation of the A206 / A207 setting and acceleration / deceleration time is as shown below.
A206 / A207 Setting value × 2 ≤ acceleration / deceleration time