A Appendix
A - 2
GX-series EtherCAT Slave Unit User’s Manual
A-1 Object Dictionary
The CAN application protocol over EtherCAT (CoE) protocol uses the object dictionary of CAN
application protocol as its base. Each object is assigned with an index of four-digit hexadecimal value.
The indexes are configured in the areas below.
This profile uses the following data types.
A-1-1 Object Dictionary Area
Indexes Area Contents
0000 hex-0FFF hex Data Type area Definitions of data types
1000 hex-1FFF hex CoE Communications area
Definitions of variables that can be used by all
servers for designated communications
2000 hex-2FFF hex Manufacturer Specific area 1 Variables defined for all OMRON products
3000 hex-5FFF hex Manufacturer Specific area 2
Variables defined for GX-series EtherCAT Slave
Units
6000 hex-9FFF hex Device Profile area
Variables defined for CiA401 generic I/O module
device profiles (profile specifying the CAN
application protocol interface for devices with digital
I/Os and analog I/Os)
A000 hex-FFFF hex Reserved area Area reserved for future use
A-1-2 Data Types
Data Types Code Size Range
Boolean BOOL 1 bit true(1), false(0)
Unsigned8 U8 1 byte 0 to 255
Unsigned16 U16 2 bytes 0 to 65535
Unsigned32 U32 4 bytes 0 to 4294967295
Integer8 INT8 1 byte −128 to 127
Integer16 INT16 2 bytes −32768 to 32767
Integer32 INT32 4 bytes −2147483648 to 2147483647
ARRAY[0..1] OF BYTE − 2 bytes −
Visible string VS −−
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