Hioki MR8904, Instruction Manual

Page: 33 / 72

5.3 Creating a CAN Definition Data File
29
Byte order
Even if the data start position (start bit) and data length are the same, the byte order (extrac-
tion method) will vary depending on whether Motorola or Intel byte order is used. The follow-
ing table provides an example for a bit length of 10 and a data start position (LSB position) of
bit 16:
For example, if the value of byte 0 is FF and the value of byte 1 is 00 in 16 bits of data, as
shown below,
U/L (Motorola) value : FF00
L/U (Motorola) value : 00FF
L/U (Intel) value : 00FF
(In Motorola format, the data start position is 8, while in Intel format, the data start position is
0.)
Motorola format
7 bit 6 bit 5 it 4 bit 3 bit 2 bit 1 bit 0 bit
byte 0 7 6 5 4 3 2 1 0
byte 1 15 14 13 12 11 10 9 8
byte 2 23 22 21 20 19 18 17 16
byte 3 31 30 29 28 27 26 25 24
Intel format
7 bit 6 bit 5 it 4 bit 3 bit 2 bit 1 bit 0 bit
byte 0 7 6 5 4 3 2 1 0
byte 1 15 14 13 12 11 10 9 8
byte 2 23 22 21 20 19 18 17 16
byte 3 31 30 29 28 27 26 25 24
*The MSB is 9.
*The MSB is 25.
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 …
byte 0 byte 1 byte 2 byte 3
End of data frame Start of data frame
2nd byte 1st byte
To read a saved CAN definition data file
Click on the Launch window and follow the instructions to open the desired file. You can
add a memo to saved CAN definition files, for example to describe the application for which
the file is to be used. You can enter up to 50 characters in the “Memo” field above the list.