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1 Introduction to NJ-series Controllers
NJ-series CPU Unit Software User’s Manual (W501)
1-1 The NJ-series Controllers
1
1-1-1 Features
Achieving a Safety Subsystem on EtherCAT
You can use NX-series Safety Control Units to integrate safety controls in a sequence and motion
control system as a subsystem on EtherCAT.
CJ-series Units
In addition to EtherCAT network slaves, you can also mount CJ-series Basic I/O Units and Special
Units on the I/O bus.
Standard-feature EtherNet/IP Communications Port
All CPU Units provide an EtherNet/IP port for EtherNet/IP communications. EtherNet/IP is a multi-
vendor industrial network that uses Ethernet. You can use it for networks between Controllers or as
a field network. The use of standard Ethernet technology allows you to connect to many different
types of general-purpose Ethernet devices.
Standard-feature USB Port
You can connect a computer that runs the Support Software directly to the CPU Unit with a USB
connection.
Standard-feature SD Memory Card Slot
You can access an SD Memory Card that is mounted in the CPU Unit from the user program.
Highly Reliable Hardware
The NJ-series Controllers provide the hardware reliability and RAS functions that you expect of a
PLC.
Integrated Sequence Control and Motion Control
An NJ-series CPU Unit can perform both sequence control and motion control. You can simultane-
ously achieve both sequence control and multi-axes synchronized control. Sequence control, motion
control, and I/O refreshing are all executed in the same control period. The same control period is
also used for the process data communications cycle for EtherCAT. This enables precise sequence
and motion control in a fixed period with very little deviation.
Multitasking
You assign I/O refreshing and programs to tasks and then specify execution conditions and execu-
tion order for them to flexibly combine controls that suit the application.
Programming Languages Based on the IEC 61131-3 International Standard
The NJ-series Controllers support language specifications that are based on IEC 61131-3. To these,
OMRON has added our own improvements. Motion control instructions that are based on PLCo-
pen
®
standards and an instruction set (POUs) that follows IEC rules are provided.
Programming with Variables to Eliminate Worrying about the Memory Map
You access all data through variables in the same way as for the advanced programming languages
that are used on computers. Memory in the CPU Unit is automatically assigned to the variables that
you create so that you do not have to remember the physical addresses.
A Wealth of Security Features
The many security features of the NJ-series Controllers include operation authority settings and
restriction of program execution with IDs.
Software Features
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