Interfacing CANopen with TCP/IP
Saturday, 09 July, 2005
Modbus-IDA and CAN in Automation e.V. (CiA) have announced a licensing agreement, resulting in Specification CiA DSP 309-2: Part 2: Modbus/TCP Mapping. CiA DSP 309-2 provides a standardised mapping of CANopen data for transport on Modbus TCP networks.
The specification defines mapping services so that CANopen devices can communicate over a Modbus TCP network via a gateway device or through the incorporation of a local Modbus TCP transport layer. Access to the entries of a CANopen object dictionary is supported on both a read and write basis, along with a variety of device control functions.
For users, this specification increases the options for communicating via Modbus TCP by standardising the way Modbus communications will be used with CANopen. This also decreases the opportunity for multiple incompatible approaches proliferating.
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