3 I/O Ports, Slave Configuration, and Unit Configuration
3-6
NJ-series CPU Unit Software User’s Manual (W501)
Use the Unit Editor in the Unit Configuration and Setup Tab Page of the Sysmac Studio to create the
Unit Configuration that is recognized as correct by the CPU Unit.
When the power is turned ON, an automatic check is performed to determine whether the “correct” Unit
Configuration matches the physical Unit configuration. The I/O ports are automatically registered for
Units that are specified in the Unit Configuration. Later, the user assigns device variables to the I/O
ports. The device variables are used in the user program to access the Units in the Unit Configuration.
Refer to CPU/Expansion Rack Configuration and Setup in the Sysmac Studio Version 1 Operation Man-
ual (Cat. No. W504) for specific procedures to create the Unit Configuration.
You can start the Controller without creating the Unit Configuration. However, if you do so, the I/O
ports and device variables will not be registered automatically, so you will not be able to access
the Units from the user program.
You can use either of the following two methods to compare the Unit Configuration.
You can verify if the Unit Configuration on the Sysmac Studio and the physical Unit configuration are the
same. You can compare the Unit Configuration on the Sysmac Studio with the physical Unit configura-
tion to see if they are the same before the first time you download the Unit Configuration to the CPU
Unit from the Sysmac Studio.
3-2-2 Creating the Unit Configuration
3-2-3 Verifying the Unit Configuration
Comparison between the Unit Configuration on the Sysmac Studio
and the Physical Unit Configuration
CPU Unit
Unit Configuration
Basic I/O Unit
Basic I/O Unit
Special Unit
Special Unit
Create the Unit Configuration with the Unit Editor of the Sysmac Studio.
CPU Unit
Unit Configuration
Sysmac Studio
Compared.
Configuration of physical Units
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