Omron Sysmac NJ-series - A-5-2 Important Case Examples; Important Case Examples

Appendices
A-60
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
When you exchange structure variable data between an NJ/NX-series CPU Unit and a remote device,
you must align the memory configuration of the structure variable members with those of the remote
device. This section describes what to do in either the NJ/NX-series CPU Unit or in the remote device.
Additional Information
This is not necessary when you exchange data between NJ/NX-series CPU Units.
There are two methods that you can use to align the memory configuration with a remote device.
For example, the differences in the memory configuration for structure variables between an NJ/NX-
series CPU Unit and a CJ-series CPU Unit are shown below.
This section describes how to align the memory configuration for these Units.
A-5-2 Important Case Examples
Aligning the Memory Configuration with a Remote Device
Data Type Definitions
Bytes
NJ/NX-series Structure Variable NJ_X
First byte
First byte + 4
First byte + 6
First byte + 8
Variable Table
a
b
c
Name
Structure Y
a
b
c
Data type
STRUCT
DINT
INT
DINT
Name
Variable NJ_X
Data type
Structure Y
a
b
Not used.
c
Data Type Definitions
Name
Structure Y
a
b
c
Data type
STRUCT
DINT
INT
DINT
Bytes
CJ-series Structure Variable CJ_X
First byte
First byte + 4
First byte + 6
Variable Table
Name
Variable CJ_X
Data type
Structure Y