Omron SYSMAC CJ1W-EIP21, Operation Manuals

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3 Assigning Device Variables for CJ-series Units
3-2
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
3-1 Data Exchange with the CPU Unit
Data exchange between the EtherNet/IP Unit and CPU Unit is performed with the I/O ports that are
assigned to the EtherNet/IP Unit and, if required, the memory used for CJ-series Units.
Refer to 3-2 Device Variables for the CJ-series Unit for information on I/O ports.
The exchange of data between the CPU Unit and the EtherNet/IP Unit is described in the following table
and figure.
Types of Data Exchange
*1 The target PLC operating and error information, Unit status, communications status, registered/normal target
nodes, and FINS/TCP connection status are sent as status.
*2 The target PLC operating and error information and the registered/normal target node table are sent as status.
3-1-1 Data Flow
Access method from
the user program
AT specification Timing of data exchange Classification of Unit data
Device variables for CJ-
series Unit I/O ports for oper-
ating data During I/O refreshing Software switches
Status
*1
I/O ports for setup
data During I/O refreshing IP address display/setting area
User-defined variables Memory used for
CJ-series Units During I/O refreshing
Status
*2
User program I/O ports
Operating data
Setup data
NJ-series CPU Unit
Device variable
for CJ-series Unit
EtherNet/IP Unit
Device variable
for CJ-series Unit
Software switch
or status AT
specification
Local memory
Software
switch
Status
Local memory
Local memory
Local memory
Local memory
Unit settings
Non-volatile memory
in EtherNet/IP Unit
Set with the
Sysmac Studio.
IP address display
/setting area
User-defined
variable
User-defined
variable
Status
Device parameter settings
(e.g., tag data link settings)
Status
Set with the
Network Configurator.
AT
specification
Tag data link (target connection)
Tag data link (originator connection)
AT
specification