4-53
IM DLM3054-01EN
Trigger Point
The following figure shows the trigger points.
• Normal Frame
IBS
Data 1
Data 2
Data N
P
P
DLC
NM
CT
Frame
Type
Frame
ID
PTYPE
Field
PID
Field
Data Bytes
Field
CRC
Field
Frame
Information
………
IBS
IBS
IBS
IBS
IBS
IBS
1 byte
1 byte
4 bits 2 bits 2 bits
0
…
12 bytes
1 byte
Normal Frame
IBS
(2)
(6)(7)(8)(9)
(10)
(1)
(1)(3)
(4)
(5)
PTYPE is an option for the polling method.
Positions (1) to (9) above are trigger points for the following conditions.
(1) SOF
End position of the start bit of a PTYPE or PID field
(2) Every PTYPE
End position of the stop bit of a PTYPE field
(3) No Response
End position of the 10th consecutive bit with logical value 1 counted
from the end position of the stop bit of the PTYPE field
(4) ID
End position of the stop bit of a PID field
(5) Sleep frame
End position of the stop bit of a CRC field
(6) Wakeup
End position of the stop bit of a frame information field
(7) Sleep
End position of the stop bit of a frame information field
(8) CT
End position of the stop bit of a frame information field
(9) Data (when Size = 0) End position of the stop bit of a frame information field
(10) Data (when Size ≠ 0)
End position of the stop bit of a specified data bytes field
Error Trigger Points
IBS
Data 1
Data 2
Data N
P
P
DLC
NM
CT
Frame
Type
Frame
ID
PTYPE
Field
PID
Field
Data Bytes
Field
CRC
Field
Frame
Information
………
IBS
IBS
IBS
IBS
IBS
IBS
1 byte
1 byte
4 bits 2 bits 2 bits
0
…
12 bytes
1 byte
Normal Frame
IBS
(1)(2)
(3)
(1)
(1)(2)
(3)(4)
(1)
(3)(4)
(1)
(3)(4)
(1)
(3)(4)
(1)(5)(6)
(7)
(1)
(3)(4)
Positions (1) to (7) above are trigger points for the following errors.
(1) Fraiming Error
End position of the bit corresponding to the stop bit of each field
(2) Parity Error
End position of a PTYPE or PID stop bit
(3) IBS Error
End position of the 10th consecutive logical value 1 bit from the end
position of the stop bit of each field (excluding PTYPE)
(4) Data Length Error
(When data length < DLC)
End position of the 10th consecutive bit with logical value 1 counted
from the end position of the stop bit of the last data bytes field
(5) CRC Error
End position of the stop bit of a CRC field
(6) Counter Error
*
End position of the stop bit of a CRC field
(7) Data Length Error
(When data length > DLC)
End position of the start bit of an exceeding byte field
* Counter Error is not a trigger point but a counter error detection point.
4 Triggering