6
YASKAWA
｜
YASKAWA AC Drive CR700 Catalog
｜
KAEP C710617 24
Yaskawa has tirelessly pursued ease of use, including initial setting functions for
crane motion axes, to improve operations and workability at all sites.
Improved Operations and Workability
Quick Deceleration Function
This function supports reverse phase braking
(
plugging
)
in
conventional crane operations that are not operated with drives.
The deceleration rate can be changed to quickly stop operation by
inputting a Run command in reverse to the current running direction
after a Stop command is received. This enables quick deceleration
near the target location even when using high speed operation.
Wire Length Detection
Information on the height of the hook that is not visible from
the operating room can be externally output using only the
drive.
Automatic Parameter Selection for Each Application
Application selection can be made for different types of crane
applications.
Selecting the appropriate application, such as lifting, traveling,
and transverse operation, will automatically enable only those
functions and disable unnecessary functions. This allows users
to easily set the optimal parameters for each application.
Lifting
Traveling
Traverse
CR700
Contactor Motor
Contactor Motor
Contactor Motor
3
-
Motor Switching Function
One drive can switch between and control motors with three axes for lifting/
lowering, travelling, and transverse operations. Our drive can support
individual brake sequences for each motor, so downtime during a drive failure
can also be reduced as a result of the ability of drives to act as substitutes for
other motors. Traditionally, one drive was needed for each motor. However,
one drive can switch between motors to reduce the number of drives needed.
Slope Prevention
High
-
precision control is performed in accordance with the operating conditions of machines to enable stable traveling and operation.
[
Synchronization Control
]
Synchronization control is performed to prevent positional
deviation that can occur when lifting a load jointly with
two elevators using Closed Loop Vector Control. Separate
equipment and control to reduce slope are not required.
[
Load Balancing Function
]
The load can be distributed evenly between drives without
the use of encoders.
CR700 CR700
Encoder Encoder
Drive 1
Time
(
t
)
Drive 1
160%
80%
Time
(
t
)
120%
Drive 2
Drive 2
Drive 1 Drive 2
Load factor
(
%
)
Load factor
(
%
)
Control mode Application
Brake Sequence
Motor1 Any Any
Motor2
Any except for Advanced
Open Loop Vector Control
Any
Motor3 V/f Control only
Traveling and
turning
Only brake release and apply
control can be set.
■
Conventional drives
■
CR700
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