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9 COMMON FUNCTIONS
9.8 Driver Communication Function
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.
• 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.
d1
[Driver
communication]
Control data 1
Control data 2
Control data 3
[Driver
communication]
Control data 2
Control data 3
[Driver
communication]
Control data 3
Master axis Slave axis 1 Slave axis 2 Slave axis 3
d2 d3 d4
Axis 1
ABS/INC
Axis 2
INC
Axis 3
INC
Axis 4
INC
Positioning command/
speed command/
torque command
Simple Motion
module
Slave axis: Control data is received from Master axis by driver communication.
SSCNETµ(/H)
Master axis: Position command, speed command or torque command is received
from Simple Motion module.
RD77MS4
ERRRUN
AX
3
4
2
1
AX
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