GE Industrial Solutions AF-300 P11 - Manual (Page 88)

5-35
S-shape Acceleration and Deceleration
This pattern reduces shock by mitigating output frequency
changes at the beginning and end of acceleration and
deceleration.
Pattern constants>
When 1 is
selcted in H07
(mid S-shape
pattern) When 2 is selcted in
H07 (mid S-shape
pattern)
Range of
S-shaped 0.05 x maximum
output
frequency (Hz) 0.10 x maximum output
frequency (Hz)
Time for
S-shaped at
acceleration 0.10 x
acceleration
time (s) 0.20 x acceleration
time (s)
Time for
S-shaped at
deceleration 0.10 x
deceleration (s) 0.20 x deceleration (s)
*
When acceleration and deceleration times are very long or
short, acceleration and deceleration are almost linear.
Curvilinear Acceleration and Deceleration
This function is used to minimize motor acceleration and
deceleration times in the range that includes a constant
output range.
H08 Rev. phase sequence lock
H 0 8 R E V L O C K
Setting range: 0: Inactive
1: Active
If accidental reversing could result in a malfunction, this
function can be set to prevent reversal.
This function prevents a reversing operation resulting from
a connection between the REV and CM terminals,
inadvertent activation of the REV key, or negative analog
input from Terminals 12 or V1.
H09 Start mode
H 0 9 S T A R T M O D E
Setting range 0, 1, 2
This function smoothly catches a spinning motor which is
coasting after a momentary power failure or after the
motor has been subject to external force, without stop-
ping the motor, i.e. windmilling fan.
At startup, this function detects the motor speed and
outputs the corresponding frequency, thereby enabling a
shock-free motor startup. The normal startup method is
used if the coasting speed of the motor is 120 Hz or more
as a drive frequency and if the value of F03 Maximum
frequency exceeds the value of F15 Frequency limiter
(upper limit).
Restart after a
momentary Line-to-drive
power switching
failure
0 Inactive Inactive Inactive
1 Inactive Active Active
2 Active Active Active
Value
Normal
startup
Explanation
1. This function is effective if F14 Restart after momen-
tary power failure (operation selection) is set to 3, 4,
or 5. This function is also effective when operation is
switched from the line to the drive. The motor is
started with the same frequency as the current
coasting speed (speed search).
2. In addition to restarting following a momentary power
failure and switching between the line and the drive,
this function detects the coasting speed of the motor
and starts the motor at the same frequency as all
startups (including when an ON operation command
is entered).
By assigning 26 (start characteristics selection) to
terminals X1 to X9, this function can be externally
selected as the normal startup method whenever an ON
operation command is entered.
Note: The dotted-dashed line indicates motor speed.
deceleration
Output
frequency
acceleration
Maximum
output
Set
frequency
Base
frequency
0 t [sec]