Omron NJ Series

2-17
2 CPU Unit Operation
NJ-series CPU Unit Software User’s Manual (W501)
2-3 Accessing I/O
2
2-3-2 Accessing I/O with Variables
 Accessing Special Units by Using User-defined Variables with AT
Specifications
The assigned memory area addresses are accessed by using AT specifications for user-defined
variables to the memory addresses that are used for the CJ-series Units. The data in the memory
used for CJ-series Units is exchanged with the data in the CJ-series Units during I/O refreshing.
The assigned memory addresses including the following addresses.
• Addresses in fixed allocations for DeviceNet Units
• Addresses in user-specified allocations for DeviceNet Units or CompoNet Master Units from
the CX-Integrator (A CompoNet Master Unit must be set to communications mode 8 to use
the CX-Integrator.)
• Addresses in expansion memory for High-speed Counter Units
• Addresses in expansion memory for Process I/O Units
Refer to A-6 Contents of Memory Used for CJ-series Units for information on the memory used for
CJ-series Units. Refer to 6-3-8 Variable Attributes for information on AT specifications.
Memory used
for CJ-series Units
CPU Unit
3200.00
CIO
Fixed allocations
for remote I/O
Slave
Slave
User-defined variables
Variable
Variable
Example: DeviceNet Unit
3201.00
%3200.00
%3201.00
Variables that are assigned to memory
addresses with AT specifications
Assigned memory addresses within
the fixed allocations for remote I/O