Campbell Scientific SDM-CAN Datalogger to CANbus Interface - Manual (Page 6)

Table of Contents
3.3.10 Multiplier (Parameter 13:).......................................................... 25
3.3.11 Offset (Parameter 14:)................................................................ 25
3.4 Advanced Programming Techniques................................................. 25
3.4.1 Interrupts Using the I/O Connection .......................................... 25
3.4.2 Group Trigger............................................................................. 27
3.4.3 Frame buffers with filtering and triggering ................................ 27
3.4.3.1 Setup of Mask and Filter / trigger.................................... 28
3.4.3.2 Reading / Polling Buffer.................................................. 28
3.4.3.3 Basic Sequence of Buffer Usage: .................................... 29
3.5 Program Examples............................................................................. 29
3.5.1 Reading CAN Data..................................................................... 29
3.5.2 Simple CAN Data Transmission ................................................ 30
3.5.3 Building and Sending Data Frames............................................ 32
3.5.4 Using the Interrupt Function ...................................................... 32
3.5.5 Using the Group Trigger ............................................................ 34
4. Programming CRBasic Dataloggers to use the
SDM-CAN.................................................................35
4.1 General Principles ............................................................................. 35
4.1.1 High Speed Block Mode ............................................................ 36
4.2 Datalogger Instruction ....................................................................... 36
4.2.1 Reading CAN Data..................................................................... 37
4.2.2 Simple CAN Data Transmission ................................................ 38
4.2.3 Digital I/O Triggered CANbus Measurements........................... 39
4.2.4 SlowSequence Instruction .......................................................... 40
5. Using the RS232 Serial Diagnostics Port ...............40
5.1 Connecting to the RS232 User Port................................................... 40
5.2 Diagnostic Commands....................................................................... 41
5.3 Loading a New Operating System into the SDM-CAN Interface ..... 43
6. Attributions................................................................44
Appendices
A. Principles of Operation...........................................A-1
A.1 Data Collection................................................................................ A-1
A.2 Frame Transmission ........................................................................ A-2
B. A Summary of Data Types......................................B-1
C. Application of the SDM-CAN on Networks
Complying with the J1939 SAE Standards.........C-1
C.1 J1939 29-Bit Identifier Format ........................................................ C-1
C.2 J1939 11-Bit Identifier Format ........................................................ C-1
C.3 J1939 Data Frame Format ............................................................... C-2
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