2 Motion Control Configuration and Principles
2-2
NJ/NX-series CPU Unit Motion Control User’s Manual (W507)
2-1 Internal Configuration of the CPU
Unit
This section provides an overview of the internal mechanisms of the NJ/NX-series CPU Unit. The CPU
Unit has the following software configuration. The Motion Control Function Module is a software module
that performs motion control.
* Refer to the NJ/NX-series CPU Unit Software User’s Manual (Cat. No. W501) for details on other Function Mod-
ules.
The PLC Function Module runs on top of the OS. The other Function Modules run on top of the PLC
Function Module. A description of each Function Module is given in the following table.
Note Refer to the NJ/NX-series CPU Unit Software User’s Manual (Cat. No. W501) for details on other Function
Modules.
This manual provides the specifications and operating procedures for the Motion Control Function Mod-
ule (sometimes abbreviated to “MC Function Module”). Refer to the other NJ/NX-series user’s manuals
as required when using the MC Function Module in an application.
Motion Control Function
Module
EtherCAT Master Function
Module
Other Function
Modules
*
PLC Function Module
OS
Function Module name Abbreviation Description
PLC Function Module PLC This module manages overall scheduling, executes
the user program, sends commands to the Motion
Control Function Module, and provides interfaces to
USB and the SD Memory Card.
Motion Control Function Module MC This module performs motion control according to
the commands from motion control instructions that
are executed in the user program. It sends data to
the EtherCAT Master Function Module.
EtherCAT Master Function Module ECAT This module communicates with the EtherCAT
slaves as the EtherCAT master.
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