Yokogawa Standalone MW100 - Manual (Page 40)

40
Data Field Length = 8 Bytes
For Big Endian: Available start bit position settings: 0–(Bit Length-1)
For Little Endian: Available start bit position settings: 0–(64-Bit Length)
The following example shows how to count start bit positions in the MX118.
When placing a data with data field length of 8 bytes, and a data with a 16-bit bit length
Data 1: 3 rd and 4 th byte from the left
Data 2: 7th and 8th byte from the left
Start bit positions For Big Endian
Data 1 position is byte 4 and 5, and start bit position is 32.
Data 2 position is byte 0 and 1, and start bit position is 0.
Start bit positions For little Endian
Data 1 position is byte 2 and 3, and start bit position is 16.
Data 2 position is byte 6 and 7, and start bit position is 48.
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7
Data 1 ： 16 bits Data 2 ： 16 bits
24 25 26 27 28 29 30 31 16 17 18 19 20 21 22 23 56 57 58 59 60 61 62 63 48 49 50 51 52 53 54 55
bit
Start bit position Start bit position
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Byte 7 Byte 6 Byte 5 Byte 4 Byte 3 Byte 2 Byte 1 Byte 0
Data 1 ： 16 bits Data 2 ： 16 bits
bit
Start bit position Start bit position
1Byte 1Byte 1Byte 1Byte 1Byte 1Byte 1Byte 1Byte
Data 1 ： 16 bits Data 2 ： 16 bits
bit 23・・・・・・16
Byte 2
lsb
7・・・・・・0
Byte 0
63・・・・・・56
Byte 7
55・・・・・・48
Byte 6
47・・・・・・40
Byte 5
39・・・・・・32
Byte 4
31・・・・・・24
Byte 3
15・・・・・・8
Byte 1
bit
lsb
23・・・・・・16
Byte 2
7・・・・・・0
Byte 0
63・・・・・・56
Byte 7
55・・・・・・48
Byte 6
47・・・・・・40
Byte 5
39・・・・・・32
Byte 4
31・・・・・・24
Byte 3
15・・・・・・8
Byte 1
Data measured
Start bit