Glossary · Systems engineering and MBSE
SysML block
Also known as: Block (SysML)
German: SysML-Block
In SysML, a block is the basic modular unit of structure; it can represent a system, subsystem, component, software item, person or physical item and carries properties, ports, operations and behavior.
- Systems engineering
In one sentence
A SysML block is the basic modular unit of structure, representing a system, part, software item or physical item with properties and ports.
Example
The block 'Servo drive' has value properties for rated power and supply voltage, ports for power and fieldbus, and a state machine for its drive states.
How it applies
- Engineering: Blocks are defined in Block definition diagram (BDD)s and used as parts in Internal block diagram (IBD)s; requirements are allocated to them.
- Data: Block properties with units and value types can feed technical data sheets directly.
- Documentation: A consistent block naming scheme helps the documentation team align component names in manuals, spare parts lists and the model.
- Reuse: Well-defined blocks can be kept in a model library and reused across machines, together with their verified properties and interface definitions.
SysML block vs. system element
A System element is the systems engineering concept of a part of a system; a SysML block is how that concept is typed in a SysML model.