A-61
Appendices
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
A-5 Variable Memory Allocation Methods
A
A-5-2 Important Case Examples
Method 1: Changing the Memory Configuration of the Structure Variable in
the NJ/NX-series CPU Unit
With an NJ/NX-series CPU Unit, you can specify member offsets to change the memory configura-
tion of the members of a structure variable. You can change the memory configuration of the mem-
bers of a structure variable in the NJ/NX-series CPU Unit so that it is the same as the memory
configuration in a remote device that the CPU Unit will communicate with. Specify the member off-
sets for a structure variable when you register the structure data type.
To communicate with a CJ-series CPU Unit, you can set the offset type to CJ to automatically use
the CJ-series memory structure. You can set the offset type to User to freely set your own offsets.
The following table gives the unit version of the CPU Units and the Sysmac Studio version that
are required to specify member offsets.
* You cannot select the memory offset type. You can set member offsets.
If you change the memory configuration of a structure variable by setting offsets, you must make the
same changes for the same structure variable in other NJ/NX-series CPU Units on the network.
Refer to the Sysmac Studio Version 1 Operation Manual (Cat. No W504-E1-03 or higher) for the
procedure to change the memory configuration of a structure variable.
Example: The following example shows how the memory configuration of the structure variable
members in the NJ-series CPU Unit is changed to match the memory configuration of the structure
variable members in the CJ-series CPU Unit.
Unit version of CPU Unit
Sysmac Studio version
1.01 or lower 1.02 1.03 or higher
1.01 or later Not possible. Possible.* Possible.
1.00 Not possible. Not possible. Not possible.
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