Contents

Revision and Copyright Information
Limited Warranty
Assistance
Safety
Table of Contents
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
2. Installation
- 2.1 Address Switch Configuration
- 2.2 Internal Jumper Settings
- 2.3 Connection to the Datalogger and Power Supply
  - 2.3.1 LED Status Indication
- 2.4 Connection to CAN-Bus.
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
  - 3.3.1 Instruction 118: SDM-CAN
  - 3.3.2 SDM Address (Parameter 01:)
  - 3.3.3 TQUANTA, TSEG1, TSEG2 (Parameters 02:, 03:, 04:)
  - 3.3.4 ID (Parameters 05:, 06:, 07:)
  - 3.3.5 Data Type (Parameter 08:)
    - 3.3.5.1 Collect and retrieve a data value:
    - 3.3.5.2 Build a data frame for transmission:
    - 3.3.5.3 Transmit individual data values onto the CAN-Bus:
    - 3.3.5.4 Transmit a previously built data frame on to the CAN-Bus (type 25):
    - 3.3.5.5 Set-up previously built data frame as a Remote Frame Response (type 26):
    - 3.3.5.6 Read error counters (type 27):
    - 3.3.5.7 Read and reset the error counters (type 28):
    - 3.3.5.8 Read status (type 29):
    - 3.3.5.9 Read the signature and version number of the SDM-CAN operating system (type 30):
    - 3.3.5.10 Send Remote Frame Request (type 31):
    - 3.3.5.11 Set SDM-CAN internal software switches (type 32):
    - 3.3.5.12 Read SDM-CAN internal switches (type 33):
  - 3.3.6 Start Bit Number (Parameter 09:)
  - 3.3.7 Number of Bits (Parameter 10:)
  - 3.3.8 Number of Values (Parameter 11:)
  - 3.3.9 Location (Parameter 12:)
  - 3.3.10 Multiplier (Parameter 13:)
  - 3.3.11 Offset (Parameter 14:)
- 3.4 Advanced Programming Techniques
  - 3.4.1 Interrupts Using the I/O Connection
  - 3.4.2 Group Trigger
  - 3.4.3 Frame buffers with filtering and triggering
    - 3.4.3.1 Setup of Mask and Filter / trigger
    - 3.4.3.2 Reading / Polling Buffer
    - 3.4.3.3 Basic Sequence of Buffer Usage:
- 3.5 Program Examples
  - 3.5.1 Reading CAN Data
  - 3.5.2 Simple CAN Data Transmission
  - 3.5.3 Building and Sending Data Frames
  - 3.5.4 Using the Interrupt Function
  - 3.5.5 Using the Group Trigger
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
  - 4.2.3 Digital I/O Triggered CANbus Measurements
  - 4.2.4 SlowSequence Instruction
5. Using the RS232 Serial Diagnostics Port
- 5.1 Connecting to the RS232 User Port
- 5.2 Diagnostic Commands
- 5.3 Loading a New Operating System into the SDM-CAN Interface
6. Attributions
Appendix A. Principles of Operation
- A.1 Data Collection
- A.2 Frame Transmission
Appendix B. A Summary of Data Types
Appendix C. Application of the SDM-CAN on Networks Complying with the J1939 SAE Standards
- C.1 J1939 29-Bit Identifier Format
- C.2 J1939 11-Bit Identifier Format
- C.3 J1939 Data Frame Format
- 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
- 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
Appendix D. Examples of CAN Data Frames and Data Encoding and Decoding
Campbell Scientific Companies

Campbell Scientific SDM-CAN Instruction Manual

Campbell Scientific SDM-CAN Interface manual cover

Pages 78

Year 0

Language(s)

of 78

Campbell Scientific SDM-CAN Interface Specification

The Campbell Scientific SDM-CAN Interface is a robust and versatile device designed to integrate seamlessly with Campbell Scientific dataloggers to enable communication with CAN (Controller Area Network) devices. This interface facilitates data exchange between the datalogger and various CAN-enabled sensors and devices, making it an essential tool for applications in automotive testing, environmental monitoring, and industrial automation. It supports both CAN 2.0A and CAN 2.0B protocols, ensuring compatibility with a wide range of devices and networks. The SDM-CAN Interface operates over a temperature range of -25°C to +50°C, making it suitable for demanding outdoor environments.

The hardware architecture of the SDM-CAN includes a high-speed CAN transceiver and a microprocessor, allowing for efficient data processing and communication. It connects to the datalogger via the SDM (Synchronous Device for Measurement) port, ensuring reliable and fast data transfer. The interface is powered directly by the datalogger, eliminating the need for an external power source. Configurable baud rates and message filtering options enhance its flexibility, allowing users to tailor communication settings to specific application requirements.

The SDM-CAN Interface is housed in a durable enclosure that provides protection against dust and moisture, ensuring long-term reliability in field conditions. Its compact design facilitates easy installation, even in space-constrained environments. With comprehensive software support, the interface allows users to configure settings and monitor CAN traffic through Campbell Scientific's LoggerNet software package, providing a user-friendly platform for data management and analysis. Overall, the Campbell Scientific SDM-CAN Interface is a high-performance solution that extends the capabilities of dataloggers, enabling integration with modern CAN-based systems for advanced data acquisition and control.

Campbell Scientific SDM-CAN Interface F.A.Q.

How do I connect the Campbell Scientific SDM-CAN Interface to a data logger?

To connect the SDM-CAN Interface to a data logger, use the SDM cable provided. Ensure the SDM-CAN module is properly connected to the SDM terminal on the data logger. Configure the data logger's software to recognize the SDM-CAN module by setting the appropriate SDM address and communication settings.

What are the troubleshooting steps if the SDM-CAN Interface is not communicating with the CAN network?

First, verify the physical connections between the SDM-CAN Interface and the CAN network. Check the CAN bus wiring for any disconnections or damages. Ensure that the CAN bus termination resistors are correctly installed. Verify the configuration settings, including the baud rate and operating mode, to ensure they match the CAN network settings.

How can I update the firmware of the SDM-CAN Interface?

To update the firmware of the SDM-CAN Interface, download the latest firmware version from the Campbell Scientific website. Connect the interface to a computer using the appropriate cable. Use the provided software tools to upload the new firmware to the device, following the instructions provided in the firmware update guide.

What maintenance procedures should be followed for the SDM-CAN Interface?

Regularly inspect the SDM-CAN Interface and its connections for any signs of wear or damage. Clean the connectors and the module housing with a dry, soft cloth. Ensure that the device is mounted in a location free from excessive vibration and moisture. Periodically check the firmware version and update if necessary.

Can the SDM-CAN Interface support multiple CAN networks simultaneously?

No, the SDM-CAN Interface is designed to communicate with a single CAN network at a time. Ensure that the network settings are correctly configured for the specific CAN network you are working with.

How do I configure the baud rate on the SDM-CAN Interface?

To configure the baud rate, access the SDM-CAN Interface settings through the connected data logger or a computer. Use the configuration software to select the desired baud rate that matches the CAN network requirements. Save the changes and restart the interface for the new settings to take effect.

What should I do if the SDM-CAN Interface is not recognized by the data logger?

Ensure that all physical connections are secure and that the SDM cable is properly attached. Verify that the correct SDM address is set in the data logger's configuration. Restart both the data logger and the SDM-CAN Interface, and check for any firmware updates that might resolve compatibility issues.

Is it possible to log CAN data directly to a computer using the SDM-CAN Interface?

Yes, it is possible to log CAN data directly to a computer by connecting the SDM-CAN Interface to the computer using a compatible communication cable. Use Campbell Scientific's software tools to configure the data logging and ensure proper data capture and storage.

What are the power requirements for the SDM-CAN Interface?

The SDM-CAN Interface requires a stable power supply within the range specified in the user manual. Typically, it operates on a 12V power supply, but refer to the exact specifications for detailed requirements. Ensure that the power source is capable of delivering the necessary voltage and current.

How can I verify the data being transmitted by the SDM-CAN Interface?

Use diagnostic software or a CAN bus analyzer to monitor and verify the data being transmitted by the SDM-CAN Interface. The software should allow you to view real-time data frames and ensure they match expected values. Additionally, check the data logger's recorded data against the known CAN messages for consistency.