5.4
Receive Object
If a frame which corresponds to the parameterized acceptance
mask of the Receive Object is received the frame is transferred to
the area of the Receive Object.
5.4.1
11-bit protocol
Byte
Content of Receive Object:
0
Len + RTR + HighByte CAN identifier
1
LowByte CAN identifier
2
Data byte 1
3
Data byte 2
4
Data byte 3
5
Data byte 4
6
Data byte 5
7
Data byte 6
8
Data byte 7
9
Data byte 8
The entire CAN message header is stored in the first two bytes
(0+1).
Byte 0
Byte 1
15
14
13
12
11
10 9 8 7 6 5 4 3 2 1 0
Data length
RTR
CAN identifier (11 bit)
The receipt of a new frame is recognized by the inversion of bit 0
in byte 0 of the
HANDSHK_IN
area.
Once the message has been processed by the PLC program this
must be acknowledged to the DP/CAN coupler. Acknowledgment
is processed by the
RecObjecCmd
byte.
5.4.2
29-bit protocol
Byte
Content of Receive Object:
0
Len + RTR
1
HighByte – HighWord CAN identifier
2
LowByte – HighWord CAN identifier
3
HighByte – LowWord CAN identifier
4
LowByte – LowWord CAN identifier
5
Data byte 1
6
Data byte 2
7
Data byte 3
8
Data byte 4
9
Data byte 5
10
Data byte 6
11
Data byte 7
12
Data byte 8
The entire CAN message header is stored in the first 5 bytes (0-4).
22
DP/CAN
Coupler
Summary of Contents for 700-651-CAN01
Page 2: ......
Page 14: ...You can assign a station address to the slave here 14 DP CAN Coupler ...
Page 29: ...Notes DP CAN Coupler 29 ...
