Application Layer - Cip Protocol; Configuration File (Eds); Communication Modes - WEG DeviceNet CFW500 User Manual

1.3.3 Application Layer – CIP Protocol
In the application layer, DeviceNet uses the
to objects, used also by ControlNet and EtherNet/IP. In other words, it is independent from the physical medi u m
and from the data link layer. The figure 1.2 presents the structure of this protocol.
The CIP has two main purposes:
Transport of I/O devices control data.

Transport of configuration and diagnosis information of the system being controlled.

A DeviceNet node (master or slave) is then molded by a set of CIP objects, which encapsulate data and
services, thus determining its behavior.
There are obligatory objects (each device must have) and optional objects. Optional objects are those that mold
the device according to the category (called profile) to which they belong, as: AC/DC drive, bar code reader or
pneumatic valve. For being different, each one of these will contain a group of also different objects.
For more information refer to the DeviceNet specification. It presents the complete list of devices already
standardized by the ODVA, as well as the objects that compose them.
1.3.4

Configuration File (EDS)

Each device in a DeviceNet network has an EDS configuration file that contains information about the device
operation and must be registered in the network configuration software, for programming of devices present in
the DeviceNet Network.
The EDS configuration file is supplied together with the product, and it can also be obtained from the
website. It is necessary to observe the equipment software version, in order to use an EDS file that is
compatible with that version.
1.3.5

Communication Modes

The DeviceNet protocol presents two basic types of messages, I/O and explicit. Each one of them is adequate
to a specific kind of data, as described below:
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Common Industrial Protocol
Figure . : CIP protocol structure in layers
1 2
(CIP). It is a protocol strictly orientated