Campbell Scientific SDM-CAN Datalogger to CANbus Interface - Manual (Page 64)

Appendix D. Examples of CAN Data Frames and Data Encoding and Decoding
Examples of values within a data-frame
16bit data frame with a one value 16bit unsigned integer LSByte first
Rxed Bit order within bytes 87654321 87654321
Rxed Byte order Byte 1 Byte 2
Values A
Bit order within values 8 1 16 9
Value byte order LSByte MSByte
Start bit (parameter 09:) RH ref 16 9 8 1
Start bit (parameter 09:) LH ref 1 8 9 16
This number is
entered into the
P118 DLD
instruction
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: 2 Rx, unsigned int, LSB 1st
9: 9 Start Bit No.
10: 16 No. of Bits
11: 1 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: 2 Rx, unsigned int, LSB 1st
9: 8 -- Start Bit No.
10: 16 No. of Bits
11: 1 No. of Values
12: 1 Loc [ value_A ]
13: 1.0 Mult
14: 0.0 Offset
D-2