CiA® 456: CANopen interface profile for configurable network components

The interface profile CiA 456 specifies the CANopen interface for configurable network components that provide CAN bridge functionality and have up to 16 CAN ports including one configurable CANopen port. Via this CANopen port, CAN data frame forwarding between the CAN ports of such a device is configured. The properties of the higher layer protocols that are running on the further up to 15 CAN ports are not considered in the specification. A CAN port is able to receive and send CAN data frames to all other CAN ports. Due to configuration enabled via the CANopen configuration port, it is possible to define by CAN-ID or CAN-ID range, to which CAN port or CAN ports CAN data frames are forwarded. The figure illustrates the principle block diagram of a configurable network component, compliant to this specification.

The functionality of CiA 456-configurable network components can be enhanced by functionalities, specified in further CiA specifications. Additional mechanisms for exceeding the borders of one CAN, by a - certain kind of - gateway application are given in:

  • CiA 302-7 describes the interface for bi-directional CANopen-to-CANopen communication in multi-level networks. It supports multiple CANopen networks implementing hierarchical and non-hierarchical architectures. Similar to CiA 456, a CiA 302-7 device may provide bridge functionality, by means of the system variables. But in contrast to CiA 456, all CAN interfaces of a CiA 302-7 device have to support CANopen as higher layer protocol. In addition to CiA 456, a CiA 302-7 device enables the remote access from one local network to up to 31 remote networks via the “remote SDO service”.
  • CiA 309 specifies network access services to a CANopen-based network for devices that interpret between an Ethernet-based network and a CANopen network. Access is only possible from the Ethernet-side to CANopen, not vice versa. Especially the part, defining e.g. reset and configurations of the gateway’s CAN data link layer(s) may be of interest.
  • CiA 315 provides the transport protocol for bridging of two CAN networks via a wireless transmission media (WTM). The specified CAN diagnostic data, accessible via the wireless communication link, may be of interest for CiA 456 devices as well. Together with CiA 315, CiA 457 should be considered.

Depending on the use case and application field, one of the other CiA interface profiles may be of interest, as well.

Title Details
Published
Size
Status
Action
CiA 302-7 version 1.0.0 CANopen additional application layer functions - Part 7: Multi-level networking
Scope

This specification describes the interface for bi-directional CANopen-to-CANopen communication in multi-level networks. It supports multiple CANopen networks implementing hierarchical and non-hierarchical architectures.

2009-02-02 907 KB DSP Login
CiA 315 version 1.0.0 CANopen generic frame for wireless tunneling and for transfer of diagnostic data
Scope

This specification specifies the generic frame for the transparent transmission of CAN messages on a wireless network.

2011-08-09 626 KB DSP Login
CiA 456 version 1.0.0 CANopen interface profile for configurable network components
Scope

This document specifies the CANopen interface for configurable network components that provide CAN bridge functionality and have up to 16 CAN ports including one configurable CANopen port. Via this CANopen port, the CAN message routing between the remaining 15 CAN ports of such a device is configured. The properties of the higher layer protocols that are running on these 15 CAN ports are not in the scope of this specification. For such applications other specifications may apply and may be combined with this profile.

2012-07-11 457 KB DSP Login
CiA 457 version 1.1.0 CANopen interface profile wireless transmission
Scope

This document specifies the CANopen interface profile for devices providing a gateway function to wireless transmission media ports.

2022-08-09 725 KB DS Login