Campbell Scientific SDM-CAN Datalogger to CANbus Interface - Manual (Page 71)

Appendix D. Examples of CAN Data Frames and Data Encoding and Decoding
24bit data frame with two 12bit unsigned integer values MSByte first
Rxed Bit order within bytes 87654321 87654321 87654321
Rxed Byte order Byte 1 Byte 2 Byte 3
Values B A
Bit order within values 12 5 4 1 12 9 8 1
Value byte order MSByte LSNib MSNib LSByte
Start bit (parameter 09:) RH ref 24 17 16 13 12 9 8 1
Start bit (parameter 09:) LH ref 1 8 9 12 13 16 17 24
Start bit (parameter 09:) Right Hand reference.
1: SDM-CAN (P118)
1: 0
SDM Address
2: 1 Time-quanta
3: 5 Tseg1
4: 2 Tseg2
5: 1000 ID Bits 0..10
6: 0000 ID Bits 11..23
7: 00 ID Bits 24..28
8: 1 Rx, unsigned int, MSB 1st
9: 1 Start Bit No.
10: 12 No. of Bits
11: 2 No. of Values
12: 1 Loc [ value_A ]
13: 1.0 Mult
14: 0.0 Offset
Start bit (parameter 09:) Left Hand reference.
2: SDM-CAN (P118)
1: 00
SDM Address
2: 1 Time-quanta
3: 5 Tseg1
4: 4 Tseg2
5: 1001 ID Bits 0..10
6: 0000 ID Bits 11..23
7: 00 ID Bits 24..28
8: 1 Rx, unsigned int, MSB 1st
9: 24 -- Start Bit No.
10: 12 No. of Bits
11: 2 No. of Values
12: 1 Loc [ value_A ]
13: 1.0 Mult
14: 0.0 Offset
D-9