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CJ1-H/CJ1M CPU Unit Ver. 2.0 Upgrades Section 1-5
1-5-4 Online Network Connections without I/O Tables
Summary With CJ-series CPU Units, the CPU Unit can recognize a CPU Bus Unit (such
as a Network Communications Unit, see note) even if the I/O tables have not
been created and there is no registered I/O tables as a result of using auto-
matic I/O allocation at startup.
Note Network Communications Units include Ethernet Units, Controller Link Units,
SYSMAC Link Units, and DeviceNet Units.
Usage If the nodes are connected to the network, this function allows a computer-
based Programming Device (such as the CX-Programmer) to connect online
to PLCs in the network even if the I/O tables have not been created. Since a
network connection is established with the PLCs, setup operations can be
performed such as creating the I/O tables (or editing and transferring I/O
tables), transferring the user program, transferring the PLC Setup, and trans-
ferring the CPU Bus Unit Setup.
This function is particularly useful when connecting the CX-Programmer via
Ethernet (using a CS1W-ETN21), because the I/O tables can be created
through Ethernet so a serial cable isn't required and it isn't necessary to
spend extra time establishing a serial connection.
Details
• Applicable Units: All CS/CJ-series CPU Bus Units
• Applicable computer-based Programming Devices: CX-Programmer and
CX-Protocol only
CPU Bus Unit
(including Network Communications Units)
CS/CJ-series CPU Unit Ver.2.0 or higher
Network
Online connection
can be made.
CPU Bus Units (including Network Communications Units)
can be recognized before I/O tables are created (I/O allo-
cation at startup is used).
CX-Programmer
Ethernet
Ethernet
CX-Programmer
1:1 Computer-to-PLC connection 1:N Computer-to-PLC connection
Even without an I/O table, it is
possible to make an online con-
nection, create the I/O table,
transfer the program, and per-
form other operations.
CS/CJ-
series
CPU Unit
Ver.2.0
CS/CJ-
series
CPU Unit
Ver.2.0
CS/CJ-
series
CPU Unit
Ver.2.0
I/O table not registered I/O table not registered I/O table not registered
Even without an I/O table, it is possible to make an online
connection, create the I/O table, transfer the program, and
perform other operations.
CS/CJ-
series
CPU Unit
Ver.2.0
I/O table not
registered
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