Control Mode Selection - YASKAWA FSDrive-MV1000 Series Instructions Manual

1.2 General Description
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Control Mode Selection

The control mode that is appropriate for your application can be selected from among the three available with the drive.
Overviews of the control modes and their features are given below.
Motor Type
Control Mode
Parameter
A1-02 = 0
Setting
Basic Control
V/f control
General variable speed
control, especially:
• Multi-motor
Main
applications (where
Applications
multiple motors are
connected to a single
drive)
PG Option Card N/A
Line-to-line resistance
Tuning
(normally not needed)
Torque
N/A
Limit
Torque
N/A
Control
Droop
N/A
Function
Note the following points when using the main control functions in
• In cases where it is possible to separate the motor and machine during trail operation, perform rotational autotuning.
After this, the control system must be adjusted within the range where the machine doesn't vibrate. Note that rotational
autotuning can only be performed when an induction motor is run in the vector control mode.
• In vector control and control of PM motors, combine only one motor with one drive. Only in the V/f control mode,
multiple motors can be controlled by a single drive. Note that, as a guide, you should select the drive capacity so that
the motor rated current is 50% to 100% of the drive rated current. When running multiple induction motors in parallel
using a single drive, the capacity of the drive should be larger than 1.1 times the total motor rated current.
• When a speed estimation type speed search is performed, only one motor must be combined with one drive. In
addition, the frequency must be no greater than 120 Hz, and the motor capacity must be the same as that of the drive or
one frame lower.
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Table 1.6 Control Modes and their Features
Induction Motors
V/f OLV
A1-02 = 2
(Factory setting)
Open Loop Vector
control
• General variable
speed control
• Applications that
require high
performance and
advanced functions
without PG on the
motor side.
N/A
Rotational, line-to-line
resistance
YES
N/A
N/A
CLV
A1-02 = 3
Closed Loop Vector
control
Ultra-high-
performance control
with a PG at the motor
side
Examples:
High-accuracy
speed control
Torque control
Torque limit
PG-B3 or PG-X3
Automatically adjusts the parameter settings
Rotational, line-to-line
that relate to the electrical characteristics of
resistance
the motor.
Sets the maximum torque for the motor to
YES
protect the load and connected machinery.
Allows direct control of motor torque for
YES
tension control and other such applications.
YES
Table 1.6.
YASKAWA ELECTRIC EZZ010926 FSDrive-MV1000 Instructions
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