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Function
PROFINET CBA is an automation system for plants with distributed intelligence. The key attributes of this model, inspired by standard IEC 61499, include:
- Structuring of logical plant sections into clearly organized subunits and their re-usability
- Clearly defined engineering of the plant
- Seamless integration of existing field bus systems
- Ethernet-based communication
Therefore, a PROFINET CBA system always comprises a variety of intelligent automation devices (components). A component includes all mechanical, electrical and IT variables (PLC program). Each individual component is created with its own manufacturer-specific, standard programming tools. A graphical, vendor-independent connection editor (iMAP) is available for linking individual components to the higher-level system, i.e. for engineering the system as a whole.
In this context, "engineering" means:
- Configuring the system
- Defining the exchange of data
- Loading configuring data to the components
A standardized PROFINET Component Description (PCD) file is created in XML to describe a component. The connection editor loads these descriptions and uses them to set up logical connections between individual components.
A PROFINET component always consists of:
- Exactly one physical device PDev, with MAC and IP address
- One or several logical devices LDev
- One ACCO per LDev
- One or several runtime automation objects per LDev (RT-Auto)
The Active Control Connection Object ACCO functions as a consumer and provider and is the heart of the communication system. The RT-Auto includes the technological functionality, i.e. the executable program.
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