Campbell-scientific SDM-CAN Datalogger to CANbus Interface Manual de usuario descargar pdf (Pagina 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

1 2 ... 66 67 68 69 70 71 72 73 74 75 76

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Campbell-scientific SDM-CAN Datalogger to CANbus Interface Manual de usuario Pagina 71