CAN in Automation (CiA) has released the CiA 462 CANopen profile for item detection devices, which include 2D and 3D optical cameras. Item detection devices are often used in mobile machines to detect obstacles.
Item detection devices collect environmental data by some physical effects like light, radar, ultrasonic sound or others. This data is “pixel”-oriented or matrix-like organized. The devices process the row data by means of item detection algorithm. The output is a list of items that were detected. The 79-page profile also specifies how the coordinate system can be configured.
Implementing the profile, the device manufacturer can supply diverse application fields using the same electronic CANopen interface implementation and simply adapting the required application functionality. A system designer may choose between CANopen devices from different manufacturers implementing the same profile-compliant functionality. For development, analysis, and maintenance of the devices, off-the-shelf CANopen tools may be used.
Profile-compliant devices support a bit-rate of 500 kbit/s (and optionally others) and emergency messages. For dynamic bit-rate assignment, automatic bit-rate detection has to be supported. Dynamic node-ID assignment (if required) is done via LSS. “This profile is unique and it is the first time that such sophisticated products use a standardized interface,” said Holger Zeltwanger, CiA Managing Director. “Its application is not limited to mobile machines.”
CiA has published more than 15000 pages of CANopen profiles. They describe communication parameters as well as device-specific application parameters. Profile specifications improve the interoperability of CANopen products. CANopen is one of the best-specified communication technologies. Besides in industrial control systems, it is used in machines-on-wheels, medical devices, rail vehicles, lift control systems, and many other embedded control systems.
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