Omron CJ1W-CORT21 Operation Manual page 91

Word T
Word T + 1
Word T + 2
Word T + 3
Word T + 4
Word T + (1 * 5)
Word T + (1 * 5) + 1
Word T + (1 * 5) + 2
Word T + (1 * 5) + 3
Word T + (1 * 5) + 4
Word T + ((A - 1)* 5)
Word T + ((A - 1)* 5) + 1
Word T + ((A - 1)* 5) + 2
Word T + ((A - 1)* 5) + 3
Word T + ((A - 1)* 5) + 4
 Receive Buffer Area
In this area one or more receive buffers are present. Every input buffer can have only one CAN mes-
sage content for receiving.
The location U of the CAN receive message buffers is configured with the command code 2902.
This memory area contains input words. Given the number of configured receive message buffers
as B, the area has the layout specified below. The layout depends on the configuration supplied via
the command codes 2905 or 2906. By selecting little of big endian format (adjust when the com-
mand is executed) a byte swap is performed (see section 4-2-4 Configure 11-Bit ID Input Message
Buffer (2905) and 4-2-5 Configure 29-Bit ID Input Message Buffer (2906) for more details).
CJ-series User Defined CAN Unit Operation Manual for NJ-series CPU Unit (W517)
Big endian:
Data length (number of bytes)
Data byte 0 Data byte 1
Data byte 2 Data byte 3
Data byte 4 Data byte 5
Data byte 6 Data byte 7
Data length (number of bytes)
Data byte 0 Data byte 1
Data byte 2 Data byte 3
Data byte 4 Data byte 5
Data byte 6 Data byte 7
Data length (number of bytes)
Data byte 0 Data byte 1
Data byte 2 Data byte 3
Data byte 4 Data byte 5
Data byte 6 Data byte 7
4 Message Communications
Little endian:
Data length (number of bytes)
Data byte 1 Data byte 0
Data byte 3 Data byte 2
Data byte 5 Data byte 4
Data byte 7 Data byte 8
Data length (number of bytes)
Data byte 1 Data byte 0
Data byte 3 Data byte 2
Data byte 5 Data byte 4
Data byte 7 Data byte 8
Data length (number of bytes)
Data byte 1 Data byte 0
Data byte 3 Data byte 2
Data byte 5 Data byte 4
Data byte 7 Data byte 8
4
4-9