YASKAWA CR700, Technical Manual, Page: 874 / 886

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 Load Share System Configuration
The following configuration diagram shows the Load Share control system.
Figure 3.1 Example Connection of Host Device and Drives

Inputting Run Command
• Inputting Using External Terminals
Wire the master and slave so that the Forward Run and Reverse Run commands can be
input to the master and slave at the same time. The following diagram shows an example of
this connection. In this case, separate the wire jumper between SC and SP on the slave side
from the other cables.
Figure 3.2 Example Connection Using Input References (Using the Internal Power Supply on
the Master)
• Input Method Using MEMOBUS/Modbus Communications
Input the Forward Run or Reverse Run command to the master and slave drives and
control running and stopping those drives by writing data to drive register address 0001H
(operation signal). Refer to the CR700 Technical Manual to connect the
MEMOBUS/Modbus communications to the drives.

Inputting Frequency Reference
The master receives the frequency reference from the host device by a method such as
external analog input, multi-step speed, or communications, but the slave receives the
frequency reference through the connection between the master and slave drives.
Frequency
reference
Torque
reference
Run command
frequency
reference
Slave
Host device
Master
Reverse Run
Master
Forward Run command
Reverse Run command
Forward Run command
Reverse Run command
Slave
Forward Run