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EtherNet/IP Unit and Built-in EtherNet/IP Port Specifications Section 2-1
CJ2 CPU Built-in EtherNet/IP Port
Note If tag data links are being used, use 100Base-TX. Otherwise, 10Base-T can
be used, but this is not recommended.
Item Specifications
Model number CJ2H-CPU@@-EIP CJ2M-CPU3@
Type 100Base-TX (See note.)
Unit classification CJ2 CPU Unit built-in port (CJ2 CPU Bus Unit)
CPU Unit
words used
Allocated CIO Area
words (CPU Bus
Unit words)
25 words/Unit (one unit number’s words)
These words contain control bits and flags, the target node PLC’s operating and error
information, Unit status, communications status, registered/normal target node infor-
mation, and FINS/TCP connection status.
Allocated DM Area
words (CPU Bus
Unit words)
100 words/Unit (one unit number’s words)
These words contain the IP address display/setting area.
User-set area Any usable data area words
Target node PLC’s operating and error information, and registered/normal target
node information
CPU Bus Unit Sys-
tem Setup
Not used.
Non-volatile memory for the CJ2
built-in EtherNet/IP port
The following settings are stored in the non-volatile memory for the built-in EtherNet/
IP port.
Note Unlike the regular Ethernet Units, the CPU Bus Unit Setup Area in the CPU
Unit is not used for these settings.
1. Unit Setup (communications settings for the built-in EtherNet/IP port, such as the
IP address, DNS server settings, host name, baud rate, FINS/UDP settings, and
FINS/TCP settings)
2. Tag data link settings (device parameters)
Transfer
specifica-
tions
Media access
method
CSMA/CD
Modulation method Baseband
Transmission paths Star form
Baud rate 100 Mbit/s (100Base-TX)
Transmission media Shielded twisted-pair (STP) cable
Categories: 100 Ω at 5, 5e
Transmission dis-
tance
100 m (distance between hub and node)
Number of cascade
connections
There is no limitation when a switching hub is used.
Current consumption (Unit) For CJ2 CPU Units, refer to the CJ2 CPU Hardware Operation Manual (W472).
Weight
Dimensions
Other general specifications Other specifications conform to the general specifications of the CJ2 or built-in Ether-
Net/IP port CJ2 CPU Unit.