Depiction Of The Cpx System On The Sercos-Device Model; Device Description - Festo CPX-FB39 Description
Terminal cpx, bus node, network protocol sercos iii
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3
Commissioning
3.2
Depiction of the CPX system on the Sercos-device model
The underlying depiction of the CPX system on Sercos is illustrated by the next graphic (è Fig. 3.1).
The CPX system is illustrated here as a Sercos device with a Sercos interface, a Sercos slave and the
associated sub device. Communication is performed by the Sercos interface and the Sercos slave. Gen
eric parts of the device application are implemented as part of the sub device. The resource IO is as
signed to the sub device: It depicts the Sercos function profile (Function Specific Profile IO) and in
cludes a depiction of the individual CPX modules on Sercos.
1
CPX system
1
corresponds
1
Device
1
(logical)
1
Generic Device Profile
owns
1
Sercos
1
interface
Fig. 3.1
3.3
Device description
During initial commissioning of a Sercos participant, the controller software is notified of certain prop
erties of the participant. These properties are administered in what are known as device description
files in standardized XML format.
The device description of Sercos-III devices is in the form of SDDML files (Sercos Device Description
Markup Language) and is based on the Sercos-III device model. This provides a separate device de
scription file for each device.
The device description files (SDDML files) are available on the Festo support portal on the
Internet (è www.festo.com/sp).
Festo – P.BE-CPX-FB39-EN – 1504NH – English
consists
1...n
CPX modules
includes
1
Sub Device
1
owns
1
Sercos
includes
1
slave
Sercos Communication Profile
0...n
uses
0...n
1
includes
1
Resource IO
Function Specific Profile IO
Physical structure
Application
communication
Sercos-III network
25
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