Glossary · Distributed automation and IEC 61499
Device model (IEC 61499)
Also known as: IEC 61499 device
German: Gerätemodell
In IEC 61499, the device model describes a device as an independent physical entity that contains one or more resources, a process interface to sensors and actuators, and a communication interface to other devices.
- IEC 61499
- Standards
In one sentence
The IEC 61499 device model describes a device as containing resources, a process interface and a communication interface.
Example
A controller is modeled as an IEC 61499 device with two resources, an interface to its local I/O and an Ethernet communication interface.
How it applies
- Engineering: The device model gives engineering tools a uniform view of different hardware. Device types define which resources exist and which service interface function blocks access I/O and communication.
- Portability: Applications refer to function block types, not to device internals. A device model with well-defined interfaces makes it easier to move applications between devices.
- Integration: Devices from different vendors can be combined if they implement a common Compliance profile (IEC 61499).
- Documentation: For each device type, document the resources, supported function block types, I/O access and communication options. This is the reference information system engineers need for mapping.
Device model vs. resource model
The device is the physical unit. The Resource model describes the functional units inside it that execute function block networks independently of each other.