Mitsubishi Electric RD77MS2 User Manual page 328

Control details
Set the master axis and slave axis in the servo parameter.
Execute each control of Simple Motion module for the master axis. (However, be sure to execute the servo ON/OFF of slave
axis and error reset at servo error occurrence in the slave axis.)
The servo amplifier set as master axis receives command (positioning command, speed command, torque command) from
the Simple Motion module, and send the control data to the servo amplifier set as slave axis by driver communication between
servo amplifiers.
The servo amplifier set as the slave axis is controlled with the control data transmitted from master axis by driver
communication between servo amplifiers.
Simple Motion
module
RD77MS4
RUN
3
AX
4
SSCNET µ (/H)
Positioning command/
speed command/
torque command
• When the communication is disconnected due to a fault in the servo amplifier, it is not possible to
communicate with the axis after the faulty axis. Therefore, when connecting the SSCNET cable, connect
the master axis in the closest position to the Simple Motion module.
• This function is used for the case to operate by multiple motors in one system. Connect the master axis and
slave axis without slip.
Precautions during control
CAUTION
• In the operation by driver communication, the positioning control or JOG operation of the master axis is not interrupted even if the servo error occurs in the
slave axis. Be sure to stop by user program.
9 COMMON FUNCTIONS
326
9.8 Driver Communication Function
ERR
1
AX
2
Master axis
[Driver
communication]
Control data 1
Control data 2
Control data 3
d1
Axis 1
ABS/INC
Master axis: Position command, speed command or torque command is received
from Simple Motion module.
Slave axis: Control data is received from Master axis by driver communication.
Slave axis 1
[Driver
communication]
Control data 2
Control data 3
d2
Axis 2
INC
Slave axis 2 Slave axis 3
[Driver
communication]
Control data 3
d3
Axis 3 Axis 4
INC INC
d4