2 System Configuration
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NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
2-1 Basic System Configuration
An NX-series NX1P2 Controller supports the following two types of configurations.
• Basic Configuration
The basic configurations include the CPU Unit and the Configuration Units that are controlled directly
by the CPU Unit. There are two basic configurations.
a) EtherCAT network configuration
b) NX Unit configuration
• Other Network Configurations
These are the configurations of the systems that are connected to the CPU Unit’s built-in EtherNet/IP
port and Communications Units.
EtherCAT Network Configuration
With an NX-series CPU Unit, you can use an EtherCAT network as a basic system.
With the EtherCAT network system of the NX-series CPU Unit, the period for sequence processing
and motion processing in the CPU Unit is the same as the EtherCAT communications period.
This enables high-precision sequence control and motion control with a constant period and little
fluctuation.
For information on EtherCAT, refer to the NJ/NX-series CPU Unit Built-in EtherCAT Port User’s Man-
ual (Cat. No. W505).
NX Unit Configuration
The CPU Rack consists of the following items.
• NX-series NX1P2 CPU Unit
• NX Unit NX-
• End Cover NX-END02
Up to eight NX Units can be connected.
By using the NX Units that support synchronous I/O refreshing, all I/O refreshing is synchronized
with the task period of the primary periodic task of the CPU Unit.
This enables high-precision synchronized control with a stable fixed period.
Basic Controller Configuration
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