Eaton PowerXL DC1, Manual

Page: 123 / 194

6 Parameters
6.2 Digital and analog inputs
DC1 Frequency Inverter 10/12 MN04020003Z-EN www.eaton.com
119
6.2.5 Second acceleration and deceleration time
Figure 68: Acceleration and deceleration time
0 Hz (P-02) and the maximum output frequency f
max
(P-01) are always refer-
ence points for the acceleration and deceleration times set in parameters P-03
and P-04.
① If a minimum output frequency (P-02 > 0 Hz) is set,
the drive's acceleration and deceleration times will be reduced to t
1
/ t
2
.
The values for the acceleration time t
1
and the deceleration time t
2
are calcu-
lated as follows:
t
1
=
(P-01 - P-02) x P-03
P-01
t
2
=
(P-01 - P-02) x P-04
P-01
￫
The defined acceleration (P-03) and deceleration times (P-04)
apply for all changes to the frequency reference value.
If the start-release (FWD, REV) is switched off, the output fre-
quency (f
Out
) is immediately set to zero. The motor runs down
uncontrolled.
If a controlled run-down is requested (with value from P-04),
parameter P-05 must be 0.
Starting friction and load inertia can lead to longer acceleration
times for the drive than those configured in P-03. Large gyrating
masses and the load being driven can lead to longer decelera-
tion times for the drive than that configured in P-04.
[Hz]
t [s]
①
f
out
P-09
P-01
P-02
P-03 P-04
t
1
t
2