CAN dictionary

Explains vocabulary and abbreviations used in CAN technology

Alphabetic selection:


layer setting services (LSS)

The CAN open layer setting services define communication services for configuring the node-ID and the bit rate via the CAN network.

layer-2 protocol

A layer-2 (means OSI layer) protocol uses the CAN communication services directly without a dedicated higher-layer protocol.

layer-7 protocol

A layer-7 (means OSI layer) protocol uses CAN communication services in a standardized manner. This allows the reuse of application software without redesigning the CAN communication software.

lEC 61162-3

IEC standard for digital interfaces for navigational equipment within a ship. Part 3 standardizes the serial data instrument network, also known as NMEA 2000.

lEC 61800-7 series

International standard specifying power drive profiles including CiA 402 and CIP motion. The CiA 402 profile mapping to CANopen (61800-7-201/-301) and the CIP motion profile mapping to DeviceNet (61800-7-202/-302) are also specified in this series of standards.

lEC 62026-3

International standard for the CAN-based DeviceNet application layer.

life guarding

Method in CAL and CANopen to detect that the NMT master does not guard the NMT slave anymore. This is a part of the error control mechanisms.

line topology

Networks, where all nodes are connected directly to one bus line. CAN networks use theoretically just line topologies without any stub cable. However, in practice you find tree and star topologies as well.


See logical link control.


Abbreviation for layer management.

LMT protocols

Protocols defined in CAL for setting node-IDs and bit rates via the CAN network.

local bus error

A local bus error affects just one or more but not all nodes in the network.

logical device

Logical entity of a CANopen device providing status, control and diagnostic information to the CANopen device in a pre-defined format.

logical link control (LLC)

The LLC sub-layer describes the upper part of the OSI data link layer (layer 2). It is concerned with those protocol issues that are independent of the type of medium access method.

low speed CAN

A term which usually means a CAN bus following the physical layer defined by ISO 11898-3. The CAN protocol is the same as used by high-speed CAN and is defined by ISO 11898-1. A CAN bus of this type is fault-tolerant and can operate up to 125 kbit/s.

low-power mode

CAN controller and CAN transceiver may support a stand-by or sleep mode requiring lower power than in active mode.

low-speed transceiver

Synonym for fault-tolerant transceivers.


See layer setting services.

Source CANdictionary (2016) - CiA CAN in Automation -