8-27
8 I/O Allocations and Unit Settings
CJ2 CPU Unit Software User’s Manual
8-2 Setting CPU Bus Units and Special I/O Units
8
8-2-2 Data Exchange
These 100 words are generally used to hold initial settings for the CPU Bus Unit. When the contents
of this area are changed from the program to reflect a change in the system, the Restart Bits
(A501.00 to A501.15) for affected Units must be turned ON to restart the Units.
Additional information
The built-in EtherNet/IP port of the CJ2H-CPU6@-EIP or CJ2M-CPU3@ is treated as a CPU Bus
Unit according to the rotary switch setting. Use the following procedure to set the communica-
tions parameters.
(1) Select CJ2B-EIP21 (built-in EtherNet/IP port for CJ2H) or CJ2M-EIP21 (built-in Ether-
Net/IP port for CJ2M) under Built-in Port/Inner Board in the I/O tables of the PLC.
Right-click and select Unit Setup.
DM Area for CPU Bus Units
100 words/Unit
CPU Bus Unit
CPU Unit
Transferred
when power
is turned ON
or the Unit is
restarted.
Transferred
each cycle
and when
necessary.
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