2-19
2 CPU Unit Operation
NJ-series CPU Unit Software User’s Manual (W501)
2-4 Sequence Control and Motion Control
2
2-4-1 Overview of Control
Instruction Types in Terms of Control Systems
In terms of the controls, the instructions can be broadly separated into the following two types of
instructions.
For details on motion control instructions, refer to the NJ-series Motion Control Instructions Ref-
erence Manual (Cat. No. W508). For details on other instructions, refer to the NJ-series Instruc-
tions Reference Manual (Cat. No. W502).
With the Sysmac Studio version 1.09 or higher, device variables can be assigned to the I/O ports
of Servo Drive and encoder input slaves to which axes are assigned.
The I/O port to which a device variable can be assigned must meet either of the following condi-
tions.
• The value of the R/W attribute is R (Read only).
• The value of the R/W attribute is W (Write only), and <Not assigned> is set for the process
data field under Detailed Settings on the Axis Basic Settings Display in the Sysmac Studio.
Precautions for Correct UsePrecautions for Correct Use
With you perform the following steps, the system will clear the assignment of the device variable
to the I/O port of a Servo Drive and encoder input slave to which an axis is assigned.
(1) With the Sysmac Studio version 1.09 or higher, assign device variables to the I/O ports of
Servo Drive and encoder input slaves to which axes are assigned.
(2) Save the project data.
(3) Open the saved project data with the Sysmac Studio version 1.08 or lower.
Type of instruction Definition
All instructions other than
motion control instructions
(sequence control)
These instructions are executed in the user program in the PLC Function
Module and processing for them is completed there.
Motion control instructions These instructions are executed in the user program in the PLC Function
Module to send commands to the Motion Control Function Module.
MC_Home (Homing), MC_Move (Positioning), MC_CamIn (Start Cam Oper-
ation), and other instructions for motion control operations
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