DeviceNet
DeviceNet is an open fieldbus developed by Allen-Bradley that works with the CAN protocol and is further developed and marketed by the Open DeviceNet Vendor Association( ODVA).
DeviceNet is located on the transmission layer as a powerful sensor- actuator network. Like most fieldbuses, it operates in master- slave mode and in multi-master mode. Communication is connection-oriented and takes place as a point-to-point connection or as a multi-point connection. There are predefined connection types that support specific services and their subsets facilitate communication.
In DeviceNet, the available communication services are represented by abstract object models as well as by the externally visible behavior of the DeviceNet nodes. The behavior of DeviceNet devices is defined in device profiles. A DeviceNet can comprise up to 64 nodes, with data rates of 125 kbit/s, 250 kbit/s and 500 kbit/s.
The DeviceNet layer model knows the physical layer in which the transmission medium and the connection components are defined, the sublayer with the physical signaling and the link layer, which are covered by specifications of the CAN bus, and the application layer with the DeviceNet specifications. The Common Industrial Protocol( CIP) for migration to IP networks also resides here.
Layers 3 to 6 are not taken into account.