Omron CJ1W-CORT21 Operation Manual page 90

4 Message Communications
If any of these bits is set, *_MsgRcv is ON.
If all these bits are reset, *_MsgRcv is OFF.
The location S of the receive trigger word is configured with the command code 2902. This memory
area contains input words. The length of the area is determined by the number of configured receive
message buffers. If the number of configured receive message buffers is B, the length is:
The result is rounded down to the nearest whole number and remaining receive bits will be ignored.
The receive trigger area table has the following layout:
Word
S 15 14
S+1 31 30
~
S+L 16*L 16*L
+15 +14
 Send Buffer Area
In this area one or more send buffers are present. Every output buffer can have only one CAN mes-
sage content for sending.
The location T of the CAN send message buffer is configured with the command code 2902. This
memory area contains output words. Given the number of configured send message buffers as A,
the area has the layout specified below. The layout depends on the configuration supplied via the
command codes 2903 or 2904. By selecting little or big endian format (adjusted when the command
is executed) a byte swap is performed (see section 4-2-2 Configure 11-Bit ID Output Message Buf-
fer (2903) and 4-2-3 Configure 29-Bit ID Output Message Buffer (2904) for more details).
4-8
(
-------------------- -
L
=
13 12 11 10 09
29 28 27 26 25
16*L 16*L 16*L 16*L 16*L
+13 +12 +11 +10 +09
CJ-series User Defined CAN Unit Operation Manual for NJ-series CPU Unit (W517)
)
B 15
+
16
Bit
08 07 06 05
24 23 22 21
16*L 16*L 16*L 16*L
+08 +07 +06 +05
04 30 02 01 00
20 19 18 17 16
16*L 16*L 16*L 16*L 16*L
+04 +03 +02 +01 +00