Control Mode Selection - YASKAWA FSDrive-MV1000 Series Instructions For Use Manual

1.2 General Description
u

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
(Multimotor control)
Parameter
A1-02 = 0
Setting
Basic Control V/f control
Multi-motor
applications (where
Main
multiple motors are
Applications
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
N/A
Droop
(N/A when using a
Function
multi-motor)
Speed
Estimate-
YES
type speed
search
Note the following points when using the main control functions in
• The V/f control mode (multimotor control) for drives is available with software versions PRG: 0108 and later.
• Perform Rotational Auto-Tuning when it is possible to separate the motor and the machine during test run. After
performing Rotational Auto-Tuning, adjust the control system within the range where the machine does not vibrate.
Rotational Auto-Tuning can only be performed when an induction motor is run in OLV or CLV.
• In vector control, combine only one motor with one drive. Multiple motors can be controlled by one drive in V/f
control mode only. Select the drive capacity so 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 performing speed estimation type speed search, combine only one motor with one drive. The motor capacity
must be the same as the drive or one frame lower.
• The torque restriction of the OLV control mode will give priority to accel/decel during accel/decel (during soft starter
change). In addition, even if the motor speed drops during constant speed due to a torque restriction, it will not operate
if the speed is less than the minimum frequency or in the reverse rotation direction. Set L7-07 = 1 (integral control) in
cases where a torque limit has been enabled during accel/decel (for use in winding machines, etc.).
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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
YES
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
Rotational, line-to-line
resistance
YES
YES
YES
YES
Table 1.6.
YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions
Remarks
–
–
–
–
–
Automatically adjusts the parameter settings
that relate to the electrical characteristics of
the motor.
Sets the maximum torque for the motor to
protect the load and connected machinery.
Allows direct control of motor torque for
tension control and other such applications.
This drive has no regenerating capability.
–
Momentarily estimates (or detects) the motor
speed during motor coasting, and actuates
quickly without stopping the motor.