Overview
This profile standardizes the electronic interfaces of the add-on equipment for special-purpose passenger cars such as taxis, police cars, emergency vehicles, vehicles for handicapped persons etc. Use of CiA 447 allows the car manufacturer to choose add-on devices (e.g. taximeter, roof bar, camera) from various suppliers.
From CANopen point of view there are some points to consider:
- The number of nodes within the network is limited to 16.
- Node Id assignment is done by LSS FastScan.
- A special sleep- and wake-up-mechanism is used.
- SDO communication works with cross links, that allow each device to communicate via SDO with each other device of the network.
- PDO communications are pre defined as in all application profiles.
- Some CAN-Ids are reserved for UDS and ISO-TP.
Further information on the profile are available at CAN in Automation e.V.. It is available for free download for CiA members.
Extension modules for CANopen Stacks
For emotas CANopen Slave Stack and CANopen Master/Slave Stack there is an extension module available that helps with the development of CiA 447 slaves and masters.
Diese Erweiterung beinhaltet neben dem im Standardlieferumfang enthaltenen LSS:
- Sleep- and wake-up handling acc. to CiA 447
- Automatic SDO configuration for cross linked access
- Automatic PDO-COB-ID configuration acc. to CiA 447
- Functions to scan network acc. to defined boot up procedure (Master)
- Examples for master and slaves
- ISO-TP support for clients and servers included with CANopen stack
The extension module is available for all microcontrollers supported by emotas. As counterparte during the developments we recommend the software tool CANopen DeviceExplorer with LSS-Master-PlugIn and CANopen interpretation of CAN messages.
