Omron NJ Series User Manual

6-29
6 Programming
NJ-series CPU Unit Software User’s Manual (W501)
6-3 Variables
6
6-3-4 Attributes of Variables
A global variable is declared in the global variable table.
Device variables that are automatically generated from the Unit configuration and slave configuration
and axis/axes group variables that are generated from the Axis Setting Table are automatically regis-
tered as global variables.
You can set the following attributes for variables.
 Attributes of Variables
Global Variables
6-3-4 Attributes of Variables
Variable Attributes According to Variable Type
Attribute Description Specification Default
Variable Name
The variable name is used to identify the
variable.
Data Type
The data type defines the format of the
data that is stored in the variable.
BOOL
AT Specification
If you want to handle a specific address
for a CJ-series Unit as a variable, specify
the address to assign to that variable.
• Not specified.
• Specify.
Not specified.
Retain
Specify whether to retain the value of the
variable in the following cases.
• When power is turned ON after a
power interruption
• When the CPU Unit changes to RUN
mode
• When a major fault level Controller
error has occurred.
• Retain: Value speci-
fied on the left is
retained if there is a
Battery.
• Non-retain: Changes
to initial value.
Non-retain: Reset
to initial value
Initial Value
You can select to set or not set an initial
value.
Initial value setting: Specify the value of
the variable in the following cases and do
not specify the Retain attribute.
• When power turned ON
• When operating mode changes
• When a major fault level Controller
error occurs
If the initial value is not set, the value is
not retained.
Initial Value
• Ye s
• None
Depends on the
data type. (Refer to
the section on initial
values.)
Constant
If you set the Constant attribute, you can
set the initial value of the variable when it
is downloaded, but you cannot overwrite
the value afterwards.
Specify making the
value a constant or not
a constant.
Network Publish
This attribute allows you to use CIP com-
munications and data links to read/write
variables from outside of the Controller.
• Do not publish
• Publish Only
• Input
• Output
Do not publish

Omron NJ Series Specifications

General

Program Capacity	Up to 128 MB
SD Card Slot	Yes
Power Supply Voltage	24 VDC
Motion Control	Yes
USB Ports	1
Operating Temperature	0°C to 55°C
Communication Interfaces	Ethernet/IP, EtherCAT, USB
Safety Function	Optional
Storage Temperature	-20°C to 75°C
Communication Ports	USB
Dimensions	Varies by model
Weight	Varies by model