Omron NJ101-10 Series, User Manual

Page: 71 / 280

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.
PDO
SDO
1000 hex
1600 hex
3000 hex
EtherCAT
CANopen device
Communications
Object dictionary
Parameters
Process Data
Device Type
Object content Index
Application
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.
3 EtherCAT Communications
3-3
NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)
3-1 EtherCA
T Communications T
ypes and Settings
3
3-1-1
CoE (CAN Application Protocol over EtherCA
T)