YASKAWA FSDrive-MV1000 Series, Instructions For Use Manual

Page: 28 / 260

1.2 General Description
28 YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions
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.
Table 1.6 Control Modes and their Features
Note the following points when using the main control functions in Table 1.6 .
• 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.).
Motor Type Induction Motors Remarks
Control Mode
V/f
(Multimotor control)
OLV CLV
–
Parameter
Setting
A1-02 = 0
A1-02 = 2
(Factory setting)
A1-02 = 3 –
Basic Control
V/f control
Open Loop Vector
control
Closed Loop Vector control –
Main
Applications
Multi-motor
applications (where
multiple motors are
connected to a single
drive)
• General variable
speed control
• Applications that
require high
performance and
advanced functions
without PG on the
motor side.
Ultra-high-performance
control with a PG at the
motor side
Examples:
High-accuracy speed
control
Torque control
Torque limit
–
PG Option Card N/A N/A PG-B3 or PG-X3 –
Ma
in
Con
trol
Fu
nc
ti
ons
Tuning
Line-to-line resistance
(normally not needed) Rotational, line-to-line
resistance Rotational, line-to-line
resistance
Automatically adjusts the parameter settings
that relate to the electrical characteristics of
the motor.
Torque
Limit
N/A YES YES
Sets the maximum torque for the motor to
protect the load and connected machinery.
Torque
Control
N/A N/A YES
Allows direct control of motor torque for
tension control and other such applications.
This drive has no regenerating capability.
Droop
Function
N/A
(N/A when using a
multi-motor)
N/A YES –
Speed
Estimate-
type speed
search
YES YES YES
Momentarily estimates (or detects) the motor
speed during motor coasting, and actuates
quickly without stopping the motor.