YASKAWA CR700, Техническое руководство, Страница: 873 / 886

EZZ023536
3/16
Basic Specifications
The CR700 is a drive designed especially for use with cranes. The basic specifications of the
CR700 are based on the information described in the CR700 Technical Manual. Refer to the
CR700 Technical Manual for more information on how to use the keypad and Auto-Tuning.

Precautions before Use
When using the drive with a hoisting and lowering shaft, wire the drive so that hoisting
direction of the machine is the Forward Run command and the lowering direction of the
machine is the Reverse Run command (all control modes). If the movement of the machine
and the direction of the Run commands do not match, the functions and performance of the
crane software will be adversely affected, and it will not be possible to obtain sufficient
performance from the machine. If the direction of motor rotation does not match the machine,
swap two phases of the power lines to the motor and change F1-05 (Encoder 1 Rotation
Selection) if the motor has an encoder to set the hoisting direction of the machine to the
Forward Run command and the lowering direction of the machine to the Reverse Run
command.
Install a fall detector or overspeed detector for safety.
 General Safety

Install a holding brake.

Implement safety measures such as fall prevention on the machine side.

Ensure that the holding brake will be applied by an external sequence when there is an
emergency or the power supply is turned OFF.

Implement a safety circuit that uses the fault relay of this product to apply the holding
brake when a fault occurs.
Function Details
Load Share
When controlling multiple motors with multiple drives and those motors drive the same load,
an unbalance will occur in the load of the motors due to differences in mechanical
characteristics of the motors and mechanical loss.
Load Share can adjust the balance of the load across the motors that drive the same load in
Open Loop Vector Control (A1-02 = 2).
This can improve problems where one of the motors becomes overloaded due to an
unbalanced load.
 Applicable Control Modes

Open Loop Vector Control (A1-02 = 2)
Precautions

This function is applicable when two drives are used.

Confirm the drive operation ready signals of the master and slave drives, and
simultaneously operate the master and slave.

This function is disabled when performing a fast stop. Simultaneously input the Fast Stop
command or External Fault to the master and slave synchronized to the fast stop time of
the master and slave drives.