3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in OPC 10000-1, OPC 10000-3, as well as the following apply.

3.1.1 Function

programmatic task performed by a Serveror device, usually accomplished by computer code execution

3.1.2 Finite State Machine

sequence of states and valid state transitions along with the causes and effects of those state transitions that define the actions of a Programin terms of discrete stages

3.1.3 ProgramStateMachineType

type definition of a Program and is a subtype of theFiniteStateMachineType

3.1.4 Program Control Method

Methodhaving specific semantics designed for the control of a Program by causing a state transition

3.1.5 Program Invocation

unique Objectinstance of a Programexisting on a Server

Note 1to entry: A Program Invocationis distinguished from other Objectinstances of the same ProgramStateMachineTypeby the object node’s unique browse path.