![background image](http://html1.mh-extra.com/html/omron/nx701-1620/nx701-1620_user-manual_742229042.webp)
Terminology
40
NX-series CPU Unit Hardware User’s Manual (W535)
PLC Function Module
One of the function modules. This function module executes the user program,
sends commands to the Motion Control Function Module, and provides an interface
to the USB and SD Memory Card.
POU
An acronym for “program organization unit.” A POU is a unit in a program execution
model that is defined in IEC 61131-3.
A POU contains an algorithm and a local variable table and forms the basic unit
used to build a user program.
There are three types of POUs: programs, functions, and function blocks.
primary periodic task
The task with the highest priority.
process data communications
One type of EtherCAT communications in which process data objects (PDOs) are
used to exchange information cyclically and in realtime. Process data communica-
tions are also called PDO communications.
program
Along with functions and function blocks, one of the three types of POUs.
Programs are assigned to tasks to execute them.
Range Specification
One of the variable specifications. You can specify a range for a variable in
advance. The variable can take only values that are in the specified range.
Retain
One of the attributes of a variable. The values of variables with a Retain attribute
are held at the following times. (Variables without a Retain attribute are set to their
initial values.)
• When power is turned ON after power interruption
• When the CPU Unit changes to RUN mode
• When you specify to not initialize the values when the user program is transferred
SDO communications
One type of EtherCAT communications in which service data objects (SDOs) are
used to transmit information whenever required.
Servo Drive/encoder input slave
Any of the EtherCAT slaves that is assigned to an axis. In the NJ/NX-series Sys-
tem, it would be a Servo Drive or Encoder Input Slave Unit.
slave
A device that performs remote I/O for a master.
slave and Unit configurations
A generic term for the EtherCAT configuration and Unit configuration.
Slave Terminal
A building-block remote I/O terminal to which a Communications Coupler Unit and
NX Units are mounted. A Slave Terminal is one type of slave.
Special Unit Setup
A generic term for the settings for a Special Unit, including the settings in allocated
DM Area words.
structure
One of the derivative data types. It consists of multiple data types placed together
into a layered structure.
synchronization
A function that automatically compares the information in the NJ/NX-series Control-
ler with the information in the Sysmac Studio, displays any differences and loca-
tions in a hierarchical form, and can be used to synchronize the information.
Sysmac Studio
A computer software application for setting, programming, debugging, and trouble-
shooting NJ/NX-series Controllers. It also provides operations for motion control
and a Simulator.
system common processing
System processing that is performed by the CPU Unit to perform I/O refreshing and
the user program execution within a task. Exclusive control of variables between
tasks, data trace processing, and other processing is performed.
system service
Processing that is performed by the CPU Unit in unused time between task pro-
cessing. The system service includes communications processing, SD Memory
Card access processing, self-diagnosis processing, and other processing.
system-defined variable
A variable for which all attributes are defined by the system and cannot be changed
by the user.
task
An attribute that defines when a program is executed.
task period
The interval at which the primary periodic task or a periodic task is executed.
union
One of the derivative data types. It allows you to handle the same data as different
data types.
Unit
A device that mounts to the CPU Rack or an Expansion Rack.
Term
Description
Содержание NX701-1620
Страница 11: ...9 Manual Structure NX series CPU Unit Hardware User s Manual W535...
Страница 46: ...Sections in this Manual 44 NX series CPU Unit Hardware User s Manual W535...
Страница 64: ...1 Introduction to NX series Controllers 1 18 NX series CPU Unit Hardware User s Manual W535...
Страница 72: ...2 System Configuration 2 8 NX series CPU Unit Hardware User s Manual W535...
Страница 90: ...3 Configuration Units 3 18 NX series CPU Unit Hardware User s Manual W535...
Страница 156: ...6 Inspection and Maintenance 6 14 NX series CPU Unit Hardware User s Manual W535...
Страница 163: ...I 1 I NX series CPU Unit Hardware User s Manual W535 Index...
Страница 166: ...I 4 NX series CPU Unit Hardware User s Manual W535 Index...
Страница 167: ......