YOKOGAWA DLM3024 - Page 58

4-36
IM DLM3054-01EN
Frame Format and Trigger Point
The following figures illustrate the formats and trigger points of the various frames.
Data Frame (Data Frame)
• Standard format
1 11 1 1 1 4 15
8N (0≤N≤8)
1 1 1
ID 10 -0
Arbitration Field
Control Field Data Field CRC Field
ACK
CAN Data Frame
DLC
3 -0
CRC
Sequence
Data
7
EOF
(1) (2) (3) (4) (6)(5)
Recessive
Dominant
SOF
RTR
IDE
r0
ACK
Delimiter
ACK slot
CRC
Delimiter
• Extended format
1 11 1 1 1 4 8N (0≤N≤8) 15 1 1 1 71 1 18
ID 28 -18
ACK
CAN Data Frame
ID 17- 0
DLC
3 -0
CRC
Sequence
EOF
Data
(1) (2) (3) (4) (6)(5)
Arbitration Field
Control Field Data Field CRC Field
SOF
SRR
IDE
ACK
Delimiter
ACK Slot
CRC
Delimiter
RTR
r0 r1
Positions (1) to (6) above are trigger points for the following conditions.
(1) SOF
(2) ID
(3) Data Frame (when DLC = 0)
(4) Data Frame (when DLC ≠ 0)
(5) CRC Error
(6) ACK
Remote Frame (Remote Frame)
• Standard format
1 11 1 1 1 4 15 1 1 1
ID 10 -0
Arbitration Field
Control Field CRC Field
ACK
Remote Frame
DLC
3 -0
CRC
Sequence
7
EOF
(1)′ (2)′ (3)′ (5)′(4)′
Recessive
Dominant
SOF
RTR
IDE
r0
ACK
Delimiter
ACK Slot
CRC
Delimiter
• Extended format
1 11 1 1 1 4 15 1 1 1 71 1 18
ID 28 -18
ACK
Remote Frame
ID 17- 0
DLC
3 -0
CRC
Sequence
EOF
(1)′ (2)′ (3)′ (5)′(4)′
Arbitration Field
Control Field CRC Field
SOF
SRR
IDE
RTR
r0 r1
ACK
Delimiter
ACK Slot
CRC
Delimiter
Positions (1)’ and (5)’ above are trigger points for the following conditions.
(1)’ SOF
(2)’ ID
(3)’ Remote Frame (when DLC = 0)
(4)’ CRC Error
(5)’ ACK
4 Triggering