CANopen specs gets trio of upgrades - Embedded.com

CANopen specs gets trio of upgrades

LONDON — CAN in Automation (CiA) has released three updated standards for CANopen.

Version 1.7 of the CiA 303-1 CANopen is a additional specification for cabling and connector pin assignment as a draft recommendation.

It recommends cabling and pin-assignment of bus connectors for CANopen-based systems and specifies naming conventions for the bus lines, ground lines and shield connections.

Beside of editorial clarifications, the 8-pin Ampseal connector for redundant communication was added. Also added were references to the 18-pin VDA interface connector and the 2-pin power connector used in automotive applications.

CiA) has also released the CiA 410 CANopen device profile for inclinometer version 1.3 as draft standard (DS). The device profile is intended for one- and two-axis inclinometers sensing the longitudinal and lateral slope values and providing them with a 16-bit or 32-bit resolution.

Beside of editorial clarifications the process data object description was extended by the definition of the counter start value for synchronous process data transmission.

The third release is a CANopen device profile for PLCopen motion control. Version 1.0 of the CiA 452 CANopen device profile is a draft standard proposal (DSP). The device profile specifies the CANopen interface for drives controlled by programmable logic controllers (PLC) using PLCopen motion control.

The drive uses some operation modes and configuration parameters as defined in the CANopen-related parts of the IEC 61800-7 (Adjustable speed electrical power drive systems). Parameters for such additional modes as gear, jog and camming are defined in the CiA 452 specification.

The drive is controlled by a drive command and 16-bit or 32-bit reference values, which depend on the chosen operation mode. The mode-dependent feedback from the drive is given via a status word and the current values. Thus the drive control is fulfilled using one TPDO (transmit process data) and one RPDO (receive process data).

Related links and articles:

SIG focuses on CANopen via Bluetooth

Intelligent CANopen module for off-highway vehicles

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