Campbell Hausfeld SDM-CAN

SDM-CAN CAN-Bus Interface User Guide

For downloading software you will need the following:

• A recent copy of Campbell Scientific’s CSOS operating system download

program

• A copy of the SDM-CAN operating system (copied to your hard-disk)

• A PC running Microsoft Windows

• A serial cable (as described above).

The SDM-CAN also requires a 12V power supply, but does not have to be

connected to a datalogger.

To load the new operating system take the following steps:

• Run the CSOS software and set up the communications parameters to specify

the COM port to which the SDM-CAN is connected.

• Select the file containing the new operating system and then follow the

instructions given. This will normally involve following a sequence of turning

the module off and then on whilst starting the download process from the PC.

• Wait until the process has completely finished and reports a successful

upgrade before removing power from the SDM-CAN or quitting CSOS.

5-4

Contents

Main SDM-CAN CAN-Bus Interface User Guide Page Guarantee Page Contents Page Section 1. Introduction 1.1 General Description 1.2 Specifications 1.2.1 General Features and Specifications 1.2.2 Electrical Specifications 1.2.2.1 Power Consumption 1.2.3 Physical Specifications Page Section 2. Installation 2.1 Address Switch Configuration 2.2 Internal Jumper Settings Page Page 2.3.1 LED Status Indication 2.4 Connection to CAN-Bus. Page Page Section 3. Programming CR10X, CR7 and CR23X Dataloggers to use the SDM-CAN 3.1 General Principles 3.2 System Limitations 3.3 The Datalogger Instruction Instruction 118: SDM-CAN SDM Address (Parameter 01:) TQUANTA, TSEG1, TSEG2 (Parameters 02:, 03:, 04:) t Bit time (t ) t ID (Parameters 05:, 06:, 07:) Data Type (Parameter 08:) Page Page Page Switch a: 0 This digit is currently unused; enter zero 3-11 Start Bit Number (Parameter 09:) Number of Bits (Parameter 10:) Number of Values (Parameter 11:) Location (Parameter 12:) 3.4 Advanced Programming Techniques 3.4.1 Interrupts Using the I/O Connection Page 3.4.2 Group Trigger 3.4.3 Frame buffers with filtering and triggering Setup of Mask and Filter / trigger Reading / Polling Buffer Basic Sequence of Buffer Usage:- 3.5 Program Examples 3.5.1 Reading CAN Data SDM-CAN CAN-Bus Interface User Guide 3.5.2 Simple CAN Data Transmission 3-18 The following example transmits a 16 bit temperature value to a CAN network running at 500K baud. ;When Flag 1 is high set SDM-CAN switches to transmit mode ;Load input location with value for switches 3.5.3 Building and Sending Data Frames 3.5.4 Using the Interrupt Function 3.5.5 Using the Group Trigger SDM-CAN CAN-Bus Interface User Guide ;Retrieve Data from CAN network B 3-22 ;Retrieve Data from CAN network B Section 4. Programming CRBasic Dataloggers to use the SDM-CAN 4.1 General Principles 4.1.1 High Speed Block Mode 4.2 Datalogger Instruction 4.2.1 Reading CAN Data 4.2.2 Simple CAN Data Transmission Flag(1) = False 4.2.3 Digital I/O Triggered CANbus Measurements 4.2.4 SlowSequence Instruction Section 5. Using the RS232 Serial Diagnostics Port 5.1 Connecting to the RS232 User Port 5.2 Diagnostic Commands Page 5.3 Loading a New Operating System into the SDM-CAN Interface Page Appendix A. Principles of Operation A.1 Data Collection A.2 Frame Transmission Page Appendix B. A Summary of Data Types A summary table of the data types is given below for quick reference. Page C.1 J1939 29-Bit Identifier Format C.2 J1939 11-Bit Identifier Format C.3 J1939 Data Frame Format 1 2 3 4 5 6 7 8 C.4 Retrieving J1939 Accelerator Pedal Position Data using a CR9000/CR5000 (Bus Speed 250k Baud) C.4.1 Encoding the Identifier Field Values C.4.2 Finding the Start Bit 1 2 3 4 5 6 7 8 C.5 Retrieving J1939 Accelerator Pedal Position Data using a CR23X/CR10X (Bus Speed 250k Baud) C.5.1 Encoding the Identifier Field Values C.5.2 Finding the Start Bit 1 2 3 4 5 6 7 8 Page Appendix D. Examples of CAN Data Frames and Data Encoding and Decoding Examples of values within a data-frame Page Page Page Appendix D. Examples of Encoding & Decoding D-5 Page Page Page Page Page Appendix D. Examples of Encoding & Decoding D-11 Page Page CAMPBELL SCIENTIFIC COMPANIES