Amtech Axpert-Eazy Series - Page 99

Axpert-Eazy AC Variable Frequency Drive
6-53
6
Acceleration
time-1 (A201)
Deceleration
time-1 (A202)
Max. Frequency (A103)
F
t
A206
A206 A207
A207
A208: Current Limit Acceleration Time (Sec)
A209: Current Limit Deceleration Time (Sec)
These are the acceleration / deceleration time for the stall current limit function. When the AC DRIVE
is operating at set frequency and output current exceeds the stall current limit B301 value, the output
frequency and voltage are reduced. The deceleration time is decided by current limit deceleration time
A209. The dc bus voltage will rise in this process. If DC bus voltage control (B307= 2 or 3) is enabled,
it will stop the deceleration, if dc bus voltage exceeds 740 Vdc level for 400 V series. This level is
factory settable. The deceleration will resume, if dc link voltage reaches to 710 V (hysteresis of 30 V)
and the output current is still higher than the stall current limit. When the output current falls below the
stall current limit, the output frequency and output voltage will ramp up with current limit acceleration
time A208 to set frequency value. The dc bus regulation level for 500 V series is 875 Vdc and 1050
Vdc for 600 V series.
Current Limit
Decel Time (A209)
Current Limit Accel
Time (A208)
Vdc
F
I
Output Freq.
(M101)
Stall Current
Limit (B301)
t
t
t
DC Bus voltage Control
(B307=2 or 3)
740Vdc
M105
A210: Acceleration Deceleration Multiplier
This is multiplier for the acceleration/ deceleration time related parameters. Parameters A201 ~ A207
and D206 ~ D207 will be multiplied by this multiplier and the effective values of these parameters will
be the result of this multiplication.
For example, if A201=10 second and A210=10, then the effective value of A201=100 second.