4 Message Communications
4-8
CJ-series User Defined CAN Unit Operation Manual for NJ-series CPU Unit (W517)
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:
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-
4-2-3 Configure 29-Bit ID Output Message Buffer (2904)
Word
Bit
S
15
14
13
12
11
10
09
08
07
06
05
04
30
02
01
00
S+1
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
~
S+L
16*L
+15
16*L
+14
16*L
+13
16*L
+12
16*L
+11
16*L
+10
16*L
+09
16*L
+08
16*L
+07
16*L
+06
16*L
+05
16*L
+04
16*L
+03
16*L
+02
16*L
+01
16*L
+00
L
B 15
+
(
)
16
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Summary of Contents for CJ1W-CORT21
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Page 140: ...Appendices A 6 CJ series User Defined CAN Unit Operation Manual for NJ series CPU Unit W517...
Page 141: ...Index 1 CJ series User Defined CAN Unit Operation Manual for NJ series CPU Unit W517 I Index...
Page 144: ...Index 4 CJ series User Defined CAN Unit Operation Manual for NJ series CPU Unit W517 Index...