10-2
Varispeed F7 Control Methods
Details of the Varispeed F7-Series Inverter control methods and their features are provided in this section.
îš‹ Control Methods and Features
Varispeed F7-Series Inverters support the following four control methods, allowing the selection of a control
method to suit the required purpose. Table 10.1 provides an overview of the control methods and their fea-
tures.
Table 10.1 Overview and Features of Control Methods
Control Method V/f Control V/f Control with PG
Open-loop Vector
Control
Flux Vector Control
Constant Setting
A1-02 = 0
(factory setting)
A1-02 = 1 A1-02 = 2
A1-02 = 3
Basic Control
Voltage/frequency
fixed ratio control
Voltage/frequency
fixed ratio control
with speed compen-
sation using a PG
Current vector con-
trol without a PG
Current vector con-
trol with a PG
Main Applications
Variable speed con-
trol, particularly for
control of multiple
motors with a single
Inverter and for
replacing existing
Inverters
Applications requir-
ing high-precision
speed control using a
PG on the machine
side
Variable speed con-
trol, applications
requiring high perfor-
mance without a PG
on the motor side,
and for replacing
open-loop vector con-
trol of the previous
VS-616G5.
Very high-perfor-
mance control with a
PG on the motor side
(simple servodrives,
high-precision speed
control, torque con-
trol, and torque limit-
ing)
PG Speed Control Board
(Option)
Not required.
Required (PG-A2 or
PG-D2).
Not required.
Required (PG-B2 or
PG-X2).
Basic
Perfor-
mance
Speed Control
Range
*1
1:40 1:40 1:100 1:1000
Speed Control Accu-
racy
*2
±2 to 3% ±0.03% ±0.2% ±0.02%
Speed Response
*3
Approx. 1 Hz Approx. 1 Hz 5 Hz 40 Hz
Maximum
Output Fre-
quency
CT
150 Hz 150 Hz 150 Hz
150 Hz
VT 400 Hz 400 Hz 400 Hz
400 Hz
Starting
Torque
*4
CT 150%/3 Hz 150%/3 Hz 150%/0.5 Hz
150%/0 min
−1
VT 120%/3 Hz 120%/3 Hz 120%/0.5 Hz
120%/0 min
−1
300 Hz 300 Hz 300 Hz 300 Hz
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