Campbell Hausfeld SDM-CAN

Section 2. Installation

Transmission of

CAN data is

hardware disabled

by default. To

enable transmission,

move the jumper to

the TX enable

position.

SDM-CAN PCB

Once the case lid

has been removed.

OBSERVE ANTI-

STATIC

PRE

Figure 2-1 SDM-CAN Internal Jumpers

Figure 2-2 SDM-CAN Isolation enabled (default)

This jumper block

is used to select

isolated or non-

isolated CAN-Bus

interface. The

jumper block can

be removed and

rotated so that the

red bar is nearest

to the mode arrow

head. The default

is for isolation

enabled.

The CAN-Bus

termination

impedance is

disabled by default.

If you need the bus

to be terminated,

then move the

jumper to the 120R

IN position.

TIONS.

The DC-DC converter is off by

default. This will reduce power

consumption from the +12V

supply but means that the isolated

circuits must be powered

externally. To enable the DC-DC

converter move the jumper to the

DC-DC ON position.

2-3

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