Campbell Scientific SDM-CAN Datalogger to CANbus Interface - Manual (Page 7)

Table of Contents
C.4 Retrieving J1939 Accelerator Pedal Position Data using a
CR9000/CR5000 (Bus Speed 250k Baud)....................................C-2
C.4.1 Encoding the Identifier Field Values ........................................C-2
C.4.2 Finding the Start Bit..................................................................C-3
C.5 Retrieving J1939 Accelerator Pedal Position Data using a
CR23X/CR10X (Bus Speed 250k Baud)......................................C-4
C.5.1 Encoding the Identifier Field Values ........................................C-4
C.5.2 Finding the Start Bit..................................................................C-5
D. Examples of CAN Data Frames and Data
Encoding and Decoding ...................................... D-1
Figures
1-1. SDM-CAN CAN-Bus Interface ...........................................................1
2-1. SDM-CAN Internal Jumpers................................................................7
2-2. SDM-CAN Isolation enabled (default) ................................................7
2-3. SDM-CAN Isolation disabled ..............................................................8
2-4. Using the Spring Loaded Terminal Blocks (Top Option) ....................9
2-5. Using the Spring Loaded Terminal Blocks (Front Option)..................9
Tables
2-1. Switch Position and Addresses ............................................................5
2-2. LED Status Indication ........................................................................10
2-3. CIA CAN Connector Pin Connections...............................................11
3-1. Typical settings of the CAN Speed Parameters .................................17
5-1. RS232 Pin Out ...................................................................................40
C-1. Mapping of the J1939 Fields into a 29-Bit Identifier .......................C-1
C-2. Mapping of the J1939 Fields into a 11-Bit Identifier .......................C-1
C-3. J1939 Data Frame Format ................................................................C-2
C-4. Mapping of J1939 Identifier Field values into a 29-Bit Identifier....C-3
C-5. Accelerator Pedal Position Value Byte Number ..............................C-3
C-6. Mapping of J1939 Identifier Field Values into a 29-Bit Identifier...C-4
C-7. Accelerator Pedal Position Value Byte Number ..............................C-5
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