Omron NJ Series User Manual

6-59
6 Programming
NJ-series CPU Unit Software User’s Manual (W501)
6-3 Variables
6
6-3-8 Variable Attributes
Additional Information
Some Basic I/O Units have more than one access method for the same I/O port, such as bit
string data and BOOL data. If you use initial values for this type of I/O port, set the initial values
for one of the access types to None.
 When Initial Values Are Set
The initial value is assigned to the variable at the following times.
• When power is turned ON
• When the operating mode changes from PROGRAM to RUN mode or from RUN to PROGRAM
mode
• When you select the Clear the present value of variables with Retain attribute Check Box, and
download the user program
• When a major fault level Controller error occurs
 When the Initial Value Specification Is Left Blank
The following initial values are used for variables for which the initial value specification is left blank.
 Initial Value of Array Variables
 Initial Values for Derivative Data Types
You do not specify an initial value for the data type itself. You set an initial value for each individual
variable.
 Variables That Do Not Apply Initial Values
For the following variables, initial values are not applied when the power is turned ON, and the val-
ues before the power interruption are retained.
• Variables with Retain attribute
Data type Default initial value
Boolean and bit strings
BOOL, BYTE, WORD, DWORD,
and LWORD
0
Integers
SINT, INT, DINT, LINT, USINT,
UINT, UDINT, and ULINT
0
Real numbers REAL and LREAL 0.0
Durations, dates, times of day,
and dates and times
TIME T#0S
DATE D#1970-01-01
TIME_OF_DAY TOD#00:00:00
DATE_AND_TIME DT#1970-01-01-00:00:00
Text strings STRING ‘ ‘(blank character)
Data type Initial value specifications
Array specifications
• You can specify an initial value for each element.
• To specify initial values, you must specify a value or leave the specification
blank for each element.
Data type Initial value specifications
Structures
• You can specify an initial value for each member.
• To specify initial values, you must specify a value or leave the specification
blank for each element.
Unions • Initial values cannot be specified. Always zero.
Enumerations • Initial values can be specified.

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