2-14
IM 701450-51E
• Standard Format and Extended Format of the Data Frame and Remote Frame
S
O
F
R
T
R
I
D
E
r
0
Recessive
Dominant
S
I R
DLC
(4 bits)
Arbitration Field
Data Field
Control
Field
Identifier (11 bits)
Standard Format
S
O
F
S
R
R
I
D
E
R
T
R
r
0
Recessive
Dominant
S
I R
DLC
(4 bits)
r
1
Arbitration Field
Data
Field
Control
Field
Identifier (11 bits)
Identifier (18 bits)
Extended Format
• Error Frame
Recessive
Dominant
Error Frame
Data Frame
Error Flag
(6 bits)
Superposition of Error Flags
(6 to 12 bits)
Error Delimiter
(8 bits)
Interframe Space or
Overload Frame
E
S: Trigger position for Start of Frame
I:
Trigger position for Identifier
R: Trigger position for RTR
D: Trigger position for Data Frame
E: Trigger position for Error Frame
When Identifier Is Selected for the Frame/Field Type
• Condition
You can select from the following:
True
Trigger is activated when one bit pattern from ID1 to ID4 is met.
False
Trigger is activated when a bit pattern other than ID1 to ID4 is met.
• Bit Pattern: ID1 to ID4
You can set 4 types of bit patterns (ID1 to ID4).
When Pattern Format is set to Hex (hexadecimal), you can enter X, 0 to 9, or A to F in
units of 4 bits. When Pattern Format is set to Bin (binary), you can enter X, 0, or 1.
The trigger is activated on the OR condition of ID1 to ID4. The number of specified
bits varies depending on the message format type as follows:
Standard format (Std)
11 bits (the max value is 7FF when Pattern Format is set to Hex
(hexadecimal)).
Extended format Ext)
29 bits (the max value is 1FFFFFFF when Pattern Format is set to
Hex(hexadecimal)).
Note
•
If Identifier is selected (ON) and all the bits from ID1 to ID4 are set to X, the trigger does
not occur. The trigger does not occur even when combined with other field and frame
types in this condition.
•
When X is included in the ID1 to ID4 bit pattern, the trigger point is set to the end of the
Identifier (ID) in the same fashion as when 0, 1 is set to the bit pattern.
•
For ID1 to ID4 and Data Field bit patterns, if there is at least one “X” bit in a group of four
bits in the binary display, the corresponding hexadecimal display will show a “$.”
2.4 Setting CAN Bus Signal Acquisition Conditions