Instructions

Gateway component for DeviceNetTM
20 / 38
5.3 DeviceNet Objects
To configure the gateway component, you have to make the
appropriate settings in the DeviceNet objects with the configuration
software of your Device master.
Object structure
DeviceNet
TM
uses the application layer CIP
TM
(Common Industrial
Protocol) that was specified by the ODVA (Open DeviceNet Vendor
Association - http://www.odva.org). Physically based DeviceNet on
CAN (Controller Area Network).
CIP is a connection oriented protocol. It allows the exchange of I/O
data via cyclical I/O messages and the exchange of general data for
configuration, diagnosis and Management via explicit messages. For
this purpose, CIP defines 4 essential functions:
– Uniform object model for addressing data
– Uniform communication model for exchanging data
– Uniform configuration methods
– Uniform device profiles
Each DeviceNet device is characterized by a collection of objects.
Each object has a defined behavior. Each object belongs to a class.
Objects belonging to the same class are called instances of this
class. Data elements within an object are called attributes. All
attributes can be addressed with class, instance and attribute IDs.
Services are explicit tasks that an object can execute.
The following sections describe which objects, attributes and
services are supported by the gateway component.
Configuration