Allen-Bradley PowerFlex400, User Manual, Page: 35 / 192

Installation/Wiring 1-25
Accel/Decel Selection
The Accel/Decel rate can be obtained by a variety of methods. The
default rate is determined by P039 [Accel Time 1] and P040 [Decel Time
1]. Alternative Accel/Decel rates can be made through digital inputs,
RS485 (DSI) communications and/or parameters. See the chart below
for the override priority.
RS485 (DSI) Port
Controls Speed
No
Yes
Either
P039 [Accel Time 1]/P040 [Decel Time 1]
or
A147 [Accel Time 2]/A148 [Decel Time 2]
can be selected when
RS485 (DSI) port is active.
Input is programmed
as "Acc & Dec 2"
[Digital Inx Sel] = 18
No
Yes
A147 [Accel Time 2]/A148 [Decel Time 2]
is active when input is active.
Speed is controlled
by [Preset Freq x]
No
Yes
P039 [Accel Time 1]/P040 [Decel Time 1];
A147 [Accel Time 2]/A148 [Decel Time 2]
determined by the active
Preset Frequency.
See A143-A146 [Preset Freq 0-3]
Drive is performing an
Auxiliary Motor AutoSwap
No
Yes
A147 [Accel Time 2]/A148 [Decel Time 2]
are used.
P039 [Accel Time 1]/P040 [Decel Time 1]
are used.