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8 NETWORK FUNCTION (SSCNET III/H) [B]
8.2 Application function
System architecture
• The master axis and slave axes are recommended to be used in a linked condition for the reason of
machine components. When they are not linked, the speed may reach a speed limit level, causing [AL. 031
Overspeed].
• Slave axes use the control command from the master axis. Therefore, the controller mainly controls
parameter settings, servo-on command, and acquisition of monitor information from a servo amplifier.
Commands regarding absolute positioning control, such as setting absolute position detection and
requesting home position setting, from the controller to slave axes must not be made.
• Configure the settings so that servo-off will be applied to all the master and slave axes when a master or
slave axis stops due to an alarm or other reason.
• When the STO signal of a servo amplifier is used, configure the settings so that the master axis and slave
axes will be turned off simultaneously.
The control modes compatible with the master-slave operation function are as follows.
*1 Multi-axis servo amplifiers cannot be used. For error details, refer to each controller manual.
Configuring the master-slave operation setting for an axis which is not compatible with the master-slave operation function will
generate [AL. 037 Parameter error].
Up to eight master axes can be set per one SSCNET III/H system. Although there is no limit for the number of slave axes for
each master axis, the total number of the master and slave axes must be within the maximum number of axes.
In addition, when the SSCNET III/H communication is shut off due to malfunction of a servo amplifier, the communications
cannot be performed with malfunctioning axis and following axes. Therefore, when connecting SSCNET III/H cables, connect
the master axis at the position which is closest to the controller.
Model
*1
Forced stop
deceleration function
Semi closed/fully closed Operation mode Master axis Slave axis
MR-J5-_B_ Disabled Semi closed loop control mode Standard control mode
Fully closed loop control mode Standard control mode
MR-J5-_B_ MR-J5-_B_ MR-J5-_B_
MR-J5-_B_
Speed limit command →
Master axis
[Driver communication]
Torque command →
Speed limit command →
[Driver communication]
Torque command →
Speed limit command →
[Driver communication]
Torque command →
Slave axis 1
Slave axis 2 Slave axis 3
Position
command →
Configuring the
same machine
Controller
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