CAN Bus & CANopen Training
Learn CAN Bus communication from the physical layer and message frame to arbitration, error handling, diagnostics and multi-node networks — then progress into CANopen NMT, Object Dictionary, PDO, SDO, COB-ID, EDS, heartbeat, EMCY and practical device integration.
Understand the CAN Network from Wire to Application
CAN is a robust multi-node communication bus used in embedded controllers, machines, vehicles, drives, sensors and distributed control systems. CANopen builds a standardized application and device communication structure on top of CAN.
CAN Bus + CANopen Engineering
The NCVT CAN Bus & CANopen program begins with CAN physical wiring, differential signalling, identifiers, frames, arbitration, bit timing, acknowledgement and error management.
Learners then move into CANopen network architecture including node states, communication objects, Object Dictionary entries, SDO transfers, PDO mapping, heartbeat, emergency messages and device configuration.
From Raw CAN Frames to Structured Devices
CAN defines how messages travel reliably across the bus. CANopen defines how devices organize, exchange and manage their application data on that CAN network.
Practical CAN Communication Training
CAN Bus and CANopen Are Related — But Not the Same
CAN Bus
CAN provides the communication mechanism that allows multiple electronic controllers to exchange messages over one shared network.
- CAN_H and CAN_L physical network
- Differential signalling
- 11-bit and 29-bit identifiers
- Message arbitration
- Data frames
- Acknowledgement
- CRC and error detection
- Error counters and fault confinement
- Bus termination
- Multi-node communication
CANopen
CANopen adds standardized device and application communication concepts on top of the CAN network.
- Node IDs
- Object Dictionary
- Network Management — NMT
- Service Data Objects — SDO
- Process Data Objects — PDO
- PDO mapping
- COB-IDs
- Heartbeat
- Emergency messages — EMCY
- EDS configuration files
What You Will Learn
CAN Bus Engineering
- CAN network architecture
- CAN_H and CAN_L wiring
- Differential signalling
- Termination resistance concepts
- Standard and extended identifiers
- CAN data frames
- Arbitration
- Bit timing fundamentals
- CRC and acknowledgement
- Error frames
- Error counters
- Bus diagnostics
CANopen Engineering
- CANopen node architecture
- NMT state machine
- Object Dictionary
- Index and sub-index concepts
- COB-ID creation and interpretation
- SDO upload and download
- Transmit PDO and Receive PDO
- PDO communication parameters
- PDO mapping
- Heartbeat producer and consumer
- EMCY messages
- EDS configuration
CAN & CANopen Technologies Covered
Understand the Main CANopen Communication Objects
SDO
Service Data Objects provide access to Object Dictionary parameters for configuration, diagnostics and device setup.
PDO
Process Data Objects efficiently exchange operational data such as status, commands, position, speed and I/O values.
NMT
Network Management controls node communication states such as initialization, pre-operational, operational and stopped.
EMCY
Emergency communication provides rapid notification when a CANopen node detects an important fault condition.
Object Dictionary
The Object Dictionary organizes configuration, status and application parameters using indexes and sub-indexes.
Heartbeat
Heartbeat mechanisms allow other network devices to monitor whether a node remains available and in the expected state.
SYNC
SYNC messages coordinate time-sensitive communication and synchronous PDO behaviour across multiple nodes.
EDS
Electronic Data Sheet files describe CANopen device capabilities, parameters and Object Dictionary entries.
CAN Bus & CANopen Curriculum
A progressive curriculum from the physical CAN network through raw message communication, CANopen device configuration, process data exchange and network diagnostics.
Industrial Communication Fundamentals
Communication architecture, distributed controllers, buses, nodes, messages and embedded networking concepts.
Introduction to CAN Bus
CAN architecture, nodes, controllers, transceivers, distributed communication and typical CAN applications.
CAN Physical Layer
CAN_H, CAN_L, twisted-pair wiring, differential signalling, topology, grounding and physical network design.
CAN Termination & Network Wiring
Bus termination, trunk and stub concepts, node connections, cable practices and common physical-layer problems.
CAN Identifiers & Frame Structure
Standard and extended identifiers, data frames, remote-frame concepts, control fields, data fields and CRC.
CAN Arbitration
Dominant and recessive bits, identifier priority, non-destructive arbitration and multi-master operation.
CAN Error Handling
Error detection, CRC errors, acknowledgement errors, bit errors, error frames, error counters and fault confinement.
CAN Bit Rate & Timing Concepts
Bit rate, synchronization, propagation concepts, sampling and network timing considerations.
Introduction to CANopen
CANopen architecture, device nodes, communication model and CANopen application concepts.
CANopen NMT & Node States
Initialization, pre-operational, operational and stopped states, NMT commands and network control.
CANopen Object Dictionary
Indexes, sub-indexes, data types, communication objects, application objects and device parameters.
COB-ID & Message Identification
CANopen communication identifiers, node-based COB-ID concepts and message identification.
SDO Communication
SDO client/server communication, parameter reading, parameter writing and Object Dictionary access.
PDO Communication
TPDO, RPDO, process-data exchange, asynchronous and synchronous communication concepts.
PDO Mapping
Mapping Object Dictionary data into PDO messages, communication parameters and process-data design.
Heartbeat, EMCY & SYNC
Node monitoring, heartbeat producer and consumer concepts, emergency communication and synchronization.
EDS & CANopen Configuration
Electronic Data Sheets, device configuration, network managers and interpretation of CANopen device parameters.
CANopen Network Project & Diagnostics
Configure multiple CANopen nodes, exchange process data, monitor messages and diagnose network communication problems.
Build and Commission a CANopen Network
Follow the engineering process used to connect, configure, exchange data and diagnose distributed CAN-based devices.
Wire
Build CAN_H/CAN_L bus wiring.
Terminate
Apply correct network termination.
Configure
Set nodes and communication parameters.
Map
Configure PDO process data.
Monitor
Analyze CAN frames and node states.
Diagnose
Find wiring, mapping and protocol faults.
CAN Bus & CANopen Projects
Two-Node CAN Network
Connect two controllers and exchange CAN frames using configured identifiers and bus termination.
CAN Frame Analysis
Capture messages and analyze identifiers, data bytes, priority and communication behaviour.
CANopen SDO Configuration
Read and modify device parameters through Object Dictionary access using SDO.
CANopen PDO Mapping
Configure process-data mapping and exchange real-time information between CANopen nodes.
CANopen Device Diagnostics
Monitor heartbeat, node state, emergency messages and communication faults.
Multi-Node CANopen Network
Configure and test a complete distributed network with multiple devices and mapped process data.
Where CAN Bus & CANopen Are Used
Who Can Join?
- Embedded systems engineers
- Electronics engineers
- Electrical engineers
- Automation engineers
- Automotive engineers
- Mechatronics engineers
- Firmware developers
- PLC and controls engineers
- Machine automation engineers
- Service and commissioning engineers
- Engineering students and diploma students
Career & Skill Direction
- CAN Communication Engineer
- CANopen Engineer
- Embedded Systems Engineer
- Firmware Engineer
- Controls Engineer
- Motion Control Engineer
- Machine Automation Engineer
- ECU Integration Engineer
- Network Diagnostics Engineer
- Field Application Engineer
- Off-Highway Electronics Engineer
Progress from Serial Communication to Advanced CAN Networks
CAN Bus & CANopen FAQs
What is CAN Bus?
CAN Bus is a robust serial communication network that allows multiple electronic controllers to exchange messages using a shared differential bus.
What is CANopen?
CANopen is a higher-level communication framework built on CAN. It defines standardized device, communication and application concepts including Object Dictionary, SDO, PDO and NMT.
What is the difference between CAN and CANopen?
CAN defines the underlying message transport, arbitration and error-handling mechanism. CANopen defines how devices organize parameters, communicate process data and manage nodes on that CAN network.
What is an Object Dictionary?
The CANopen Object Dictionary is a structured collection of device communication, configuration and application parameters identified through indexes and sub-indexes.
What is the difference between SDO and PDO?
SDO communication is mainly used to access and configure Object Dictionary parameters. PDO communication is optimized for efficient exchange of process or operational data.
What are TPDO and RPDO?
A TPDO is a Process Data Object transmitted by a node. An RPDO is process data received and consumed by a node.
What is a COB-ID?
A COB-ID identifies a CANopen communication object on the CAN network and helps determine the CAN identifier used for that message.
Is CANopen used with drives and motion controllers?
Yes. CANopen is used in many distributed control, drive, motion, machine and embedded applications. Device-profile concepts can standardize how particular classes of equipment exchange data.
Is J1939 the same as CANopen?
No. Both use CAN as an underlying communication technology, but CANopen and SAE J1939 define different higher-level communication models and are used in different application ecosystems.
Does NCVT have separate J1939 training?
Yes. NCVT maintains a separate J1939 / CAN Bus program for automotive, commercial vehicle and off-highway communication concepts.
Start Your CAN Bus & CANopen Training
Learn physical CAN networks, message frames, arbitration, diagnostics, Object Dictionary, SDO, PDO, NMT, COB-ID, EDS and practical CANopen device communication.
Contact NCVT for CANopen Training →