Fuji Electric FRENIC-Multi - Page 106

5-23
• If you choose S-curve acceleration/deceleration or curvilinear acceleration
/
deceleration in Acceleration/Deceleration Pattern (H07), the actual
acceleration/deceleration times are longer than the specified times. Refer to the
description of H07 for details.
• Specifying an improperly short acceleration/deceleration time may activate the
current limiter, torque limiter, or anti-regenerative control, resulting in a longe
r
acceleration/deceleration time than the specified one.
• Acceleration time 1 (F07, F08) and deceleration time 1 (E10, E11) is switched by
terminal command RT1 assigned to any of the digital input terminals with any o
f
function codes E01 through E05.
• Acceleration/deceleration time 1 (F07/F08) and acceleration/deceleration time 2
(E10/E11) are switched by terminal command RT1 assigned to any of the digital
input terminals with any of function codes E01 through E05.
F09
F37
Torque Boost 1
Load Selection/Auto Torque Boost/Auto Energy Saving Operation 1
F37 specifies V/f pattern, torque boost type, and auto energy saving operation for optimizing
the operation in accordance with the characteristics of the load. F09 specifies the type of
torque boost in order to provide sufficient starting torque.
Data for
F37
V/f pattern
Torque boost
(F09)
Auto energy
saving
Applicable load
0
Variable
torque V/f
pattern
Variable torque load
(General purpose fans and pumps)
1
Torque
boost
specified by
F09
Constant torque load
2
Linear
V/f pattern
Auto torque
boost
Disable
Constant torque load
(To be selected if a motor may be
over-excited at no load.)
3
Variable
torque V/f
pattern
Variable torque load
(General purpose fans and pumps)
4
Torque
boost
specified by
F09
Constant torque load
5
Linear
V/f pattern
Auto torque
boost
Enable
Constant torque load
(To be selected if a motor may be
over-excited at no load.)
Note: If a required "load torque + acceleration toque" is more than 50% of the rated torque, it
is recommended to select the linear V/f pattern (factory default).
 V/f characteristics
The FRENIC-Multi series of inverters offers a variety of V/f patterns and torque boosts, which
include V/f patterns suitable for variable torque load such as general fans and pumps or for
special pump load requiring high starting torque. Two types of torque boost are available:
manual and automatic.
Variable torque V/f pattern (F37 = 0)
Linear V/f pattern (F37 = 1)