Omron Sysmac NJ Series User Manual page 71

Additional Information
Object Dictionary
The object dictionary is a data table within the device that interfaces the application and com-
munications. It describes the information handled by the device. Each piece of information is
called an object.
Each object is assigned a 4-digit hexadecimal index.
Each object is divided into a data type area, a CoE communications area, and a manufacturer-
specific area.
CANopen device
Application
Index
1000 hex
1600 hex
3000 hex
Process data communications is used to read and write the process data in the CoE communi-
cations area in these objects.
SDO communications is used to read and write the parameters within the manufacturer-specific
area in these objects.
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
Object content
Device Type
Process Data
Parameters
Communications
PDO
SDO
EtherCAT
3 EtherCAT Communications
Object dictionary
3
3-3