IbaBM CAN CAN/CANopen bus sniffer

IbaBM CAN Bus Analyzer: Technical Characteristics, System Integration, and Professional Application Guide

In the field of modern industrial automation, Controller Area Network (CAN) bus is widely used in equipment control, sensor networks, and vehicle electronic systems due to its high reliability, real-time performance, and low cost advantages. However, efficient and non-destructive monitoring and analysis of data on the CAN bus is crucial for system debugging, performance optimization, and fault diagnosis. The ibaBM CAN bus analyzer launched by iba AG is a professional grade hardware device designed to meet this demand. This article aims to comprehensively introduce the technical specifications, working principles, installation steps, system integration methods, and configuration methods based on the ibaPDA-V6 software platform of ibaBM CAN, providing a detailed operation and application guide for professional technicians.

Product Overview and Core Features

IbaBM CAN is an intelligent analyzer (Sniffer) designed specifically for CAN/CANopen bus. Its main function is to extract measurement data from CAN bus messages, convert it into signals that can be transmitted through optical fibers, and finally send them to the ibaPDA-V6 data acquisition and processing system for recording, analysis, and visualization. The core design concept is "transparent monitoring", which means that when the device is connected to the existing CAN bus network, the physical characteristics of the bus are hardly changed, ensuring that the original communication is not affected.

The core functional highlights include:

Non invasive monitoring: ibaBM CAN, as a monitoring node on the bus, will not send messages that affect bus communication, ensuring the originality and authenticity of the data collection process. It can be connected as a terminal device of the bus or connected in series in the middle of the bus.

High precision cycle time measurement: One prominent feature of this device is the ability to measure the time interval (in microseconds μ s) between each CAN ID message. This diagnostic function is crucial for evaluating bus load, identifying ID priority issues, and detecting communication delays caused by bus overload. The measured cycle time data can be used as signals for processing and triggering in ibaPDA.

Powerful signal processing capability: The device supports parsing up to 512 analog signals and 512 digital signals (per millisecond) from CAN messages, covering multiple data types such as BYTE, INT, WORD, DINT, WORD, FLOAT, etc. It supports standard 11 bit IDs and extended 29 bit IDs, which can adapt to the signal extraction requirements of different CANopen devices or custom protocols.

High speed fiber optic communication: Through the built-in ibaNet fiber optic interface (32 Mbit/s), data can be transmitted over long distances to the acquisition PC without interference. The excellent electromagnetic interference resistance of fiber optic media enables the system to maintain data transmission stability even in harsh industrial environments.

Flexible configuration and management: The device provides both Ethernet (TCP/IP) and USB configuration interfaces, allowing users to easily set device parameters and upgrade firmware through a web browser on their PC or the I/O manager on ibaPDA.

Hardware interface and mechanical characteristics

IbaBM CAN adopts a sturdy DIN rail installation design, suitable for installation environments inside industrial control cabinets. The hardware interface design is clear and the functional zoning is clear.

1. Front panel and top interface:

CAN bus interface: Provides two standard 9-pin D-Sub female connectors (X40: Bus0, X41: Bus1) for connecting two independent CAN bus lines or for loop access.

Fiber optic interface: Equipped with two ST fiber optic connectors (RX non functional, TX used for data transmission), connected to the ibaFOB-D series fiber optic input card on the PC end via 62.5/125 μ m fiber optic.

Power supply and switch: Powered by a 2-pin Phoenix terminal connector (black), supporting 24V DC ± 10% (maximum current 600mA), and equipped with a power switch (S11).

Status indicator light:

System status: Run (green, flashing indicates normal), 32Mb (white, indicating 32Mbit/s fiber optic communication), Stop (red, indicating fault).

CAN bus status: Each bus interface corresponds to four LEDs (Run, Bus, Act, Err), which respectively indicate the controller status, bus detection, configuration loading, and error status.

Communication interface status: Both Ethernet and USB interfaces have LED indicators indicating connection and activity status.

2. Bottom and side panel interfaces and controls:

Configure interfaces: one RJ45 Ethernet port (X22) and one USB 2.0 port (X23) for device parameter configuration and web interface access.

Dial switches (S1, S2): used to restore the device to factory settings. Dial S1 to "6" and S2 to "9", press and hold button S10 while restarting the device to reset all network parameters and passwords.

CAN bus configuration switches (S4, S5, S6): These three switches are used to configure the physical connection mode of the CAN bus.

S4: Control the connection of the terminal resistance (120 Ω) of Bus0.

S5: Control the connection of the terminal resistance (120 Ω) of Bus1.

S6: Control the internal connection between Bus0 and Bus1. When S6 is ON, Bus0 and Bus1 are internally connected for the "loop through" mode.

Protective Ground Interface (X29): Used to connect the system's protective ground, ensuring equipment safety and effective signal shielding.

Mechanical and Environmental Specifications:

Dimensions: 69 mm x 189 mm x 148 mm (width x height x depth)

Working temperature: 0 ° C to 50 ° C

Protection level: IP20

Installation method: Vertical DIN rail installation

System Integration and Network Topology

IbaBM CAN can be flexibly integrated into existing CAN bus systems, with three typical access methods depending on the physical structure of the bus.

1. Bus terminal access:

When the device is located at the end of the CAN bus, connect the end plug of the CAN main cable to one of the interfaces in Bus0 or Bus1. At this point, it is necessary to set the S6 switch to OFF (disconnect the internal connection between Bus0 and Bus1) and activate the terminal resistor of the corresponding interface (for example, if Bus0 is used, set S4 to ON). In this mode, two CAN bus interfaces (Bus0 and Bus1) can be used as two independent CAN bus channels, listening to two different buses respectively.

2. Intermediate node access:

When the device needs to be connected to a running bus, connect the incoming and outgoing plugs on the bus cable to the Bus0 and Bus1 interfaces of the device, respectively. At this point, S6 must be set to OFF (disconnect internal connections), and the terminal resistors of both interfaces (S4 and S5) must be set to OFF (as terminal resistors are usually provided by nodes at both ends of the bus). In this topology, the device is connected to the bus as a transparent node and listens to all communication on the bus.

3. Loop passing mode:

When the bus is disconnected at the access point, forming two cable ends with terminating resistors, these two ends can be connected to the Bus0 and Bus1 interfaces of the device respectively. At this point, S6 must be set to ON (connecting Bus0 and Bus1 internally), and the terminal resistors of both interfaces (S4 and S5) must be set to OFF. In this mode, the bus signal is transmitted internally through the device, and the device monitors the bus communication, but physically the bus is continuous. It should be noted that in loop through mode, only one CAN bus can be connected.

Communication configuration and parameterization

The parameter configuration of ibaBM CAN is divided into two levels: the network settings of the device itself and the signal acquisition configuration. The network settings are completed through the built-in web server of the device, while the signal acquisition configuration is completed through the I/O manager of ibaPDA.

1. Web interface configuration (basic settings):

Connection method: via Ethernet (URL: http://can_nnnn , where nnnn is the last four digits of the MAC address) or USB (URL: http://192.168.0.1) to access the device's web interface.

User permissions: The system distinguishes between regular users (username: can, password: can, view only) and administrators (username: admin, password: can, can modify network parameters, passwords, and firmware).

Main configuration items:

Network settings: Configure the IP address acquisition method (DHCP or static), subnet mask, and default gateway for Ethernet interfaces.

Password management: Change the login password for "can" and "admin" users.

Firmware upgrade: Upload and install the firmware update file (. CAB) provided by iba AG.

Signal settings viewing: You can view the signal mapping relationship configured in ibaPDA, but cannot modify it here.

2. ibaPDA-V6 configuration (signal acquisition settings):

This is the core step of the entire system configuration. Completed in the I/O Manager of ibaPDA-V6 (version 6.24 and above).

Add ibaBM CAN device module:

In the I/O Manager, locate the ibaFOB-D fiber input card connected to the device.

Right click on the corresponding fiber link and select "Add Module" ->"ibaBM CAN". The system will automatically detect or manually add devices.

Configure global parameters (General tab):

IP address: Enter the IP address or device name of the device (such as can_0101).

Baud rate: Set the baud rate (10 kbit/s to 1 Mbit/s) that matches the CAN bus network for each bus (Bus0, Bus1).

Global timeout: Set a global timeout period, during which if an ID does not receive a new message, the signal value will be processed according to preset rules.

Acknowledge: A special option that is only enabled when ibaBM CAN is the only device on the bus.

Configure COB timeout: Through this link, timeout times can be set separately for specific CAN IDs, overriding global settings.

Add a "sniffer" submodule:

Right click on the added ibaBM CAN device module and select "Add Module" ->"Sniffer".

Name the sniffer module and determine the signal group it processes.

Configure analog/digital signals (Analog/Digital tab):

Signal name and unit: The name and engineering unit defined for the signal displayed in ibaPDA.

Bus selection: Select whether the signal comes from Bus0 or Bus1.

COB ID: The ID (11 or 29 bits) of the CAN message where the input signal is located.

Source: Select the data source, usually "IO" (data area from CAN message) or "Time" (cycle time of measurement message).

Address: The starting byte offset of the specified signal in the CAN message data area.

Data type: Select the correct data type (BYTE, INT, WORD, DINT, WORD, FLOAT).

Tag: For digital signals, specify the specific number of bits in the address byte.

Scale transformation: By using the "gain" and "offset" parameters, the original data is converted into engineering values with practical physical significance.

Default value and timeout handling: Define whether to send the last valid value or a user-defined default value when a message exceeds its time limit.

Diagnosis and Status Monitoring

IbaBM CAN provides multi-level diagnostic functions to help users quickly locate problems.

Hardware LED indicator lights: The abundant LED indicator lights on the device panel are the first line of defense for on-site diagnosis. The flashing Run light indicates that the system is functioning properly; The LED combinations of Run (controller status), Bus (bus detection), Act (configuration loading), Err (error), etc. for each interface of the CAN bus provide intuitive CAN physical layer and protocol layer status information.

IbaPDA I/O Manager Diagnostic Tab:

In the "Diagnostics" tab of the I/O Manager, you can view the current status of each CAN ID in a table format. By using icons with different colors and borders, it is possible to visually determine which IDs have configured sniffing, which IDs have received messages within the timeout period, and which IDs have not received messages. This is very effective for verifying whether the configuration is correct and monitoring the bus communication status.

Web interface status and startup logs:

The "Status" tab of the web interface displays the operational status of CAN controllers, drivers, and management. The "Startup Log" tab records events during the device startup process and is a powerful tool for troubleshooting startup failures or configuration errors.

Technical data summary

Project specification parameters

Power supply 24 V DC ± 10%, maximum 600 mA

CAN interface 2 x D-Sub 9-pin, supports standard 11 bit/extended 29 bit ID, baud rate 10 kbit/s -1 Mbit/s

Fiber optic interface 1 x TX (ST connector), 32 Mbit/s, maximum transmission distance 2000 meters (62.5/125 μ m fiber optic)

PC interface 1 x Ethernet (configuration), 1 x USB 2.0 (configuration)

The maximum collection capacity is 512 analog signals/ms, and the maximum is 512 digital signals/ms

Configure and manage web interface (Ethernet/USB), ibaPDA V6 I/O Manager

Mechanical dimensions 69 mm x 189 mm x 148 mm

Working temperature: 0 ° C to 50 ° C

Certification CE