Product manual

Appendix C. Application of the SDM-CAN on Networks Complying with the J1939 SAE Standards
C.5.2 Finding the Start Bit
The byte number of the Accelerator pedal position value is 2
TABLE C-7. Accelerator Pedal Position Value Byte Number
1 2 3 4 5 6 7 8
87654321 87654321 87654321 87654321 87654321 87654321 87654321 87654321
The start bit for this value is 49, as it is the least significant bit of the data value
within the data frame that this parameter refers to.
An example for Accelerator pedal position is shown below.
;{CR23X}
;
*Table 1 Program
01: 1.0 Execution Interval (seconds)
;Retrieve Accelerator pedal position Data from CAN network
8: SDM-CAN (P118)
1: 0 SDM Address
2: 4 Time Quanta
3: 5 Tseg1
4: 2 Tseg2
5: 768 ID Bits 0..10 (-- for 11-bit CAN ID)
6: 7680 ID Bits 11..23
7: 12 ID Bits 24..28
8: 2 Rx, unsigned int, LSB 1st
9: 49 Start Bit No.
10: 8 No. of Bits
11: 1 No. of Values
12: 7 Loc [ Throttle ]
13: 0.125 Mult
14: 0.0 Offset
*Table 2 Program
02: 0.0000Execution Interval (seconds)
*Table 3 Subroutines
End Program
C-5