For the purposes of this document, the terms and definitions given in the referenced OPC UA Specifications as well as the following apply.

data in a POWERLINK network that is not time critical

Note 1 to entry: Within the POWERLINK cycle there is a specific period reserved for Asynchronous POWERLINK Datawhich is shared by all POWERLINK Devices. Each POWERLINK Deviceconnected to the network can send asynchronous data by requesting it to the POWERLINK Managing Node. The POWERLINK Managing Nodekeeps a list of all asynchronous data requests and will subsequently grant the network access to one POWERLINK Deviceafter the other.

communication process with predictable timing behaviour (I.e. the time when a message reaches the recipient is predictable)

data in a POWERLINK network which is to be transmitted every cycle (or every nth cycle in case of multiplexed isochronous data)

ethernet as standardised in IEEE 802.3 (non-deterministic operation in non-time-critical environments)

Network Management State of a POWERLINK Device

POWERLINK Devicewithout the ability to manage the SCNM mechanism

standardised or vendor specific definition of an object model

POWERLINK Devicecapable to manage the SCNM mechanism in a POWERLINK network

device in a POWERLINK network

data object, addressed by Index and Sub-Index

repository of all POWERLINK Objectsaccessible over POWERLINK communications

record data type (as defined in the POWERLINK specification EPSG DS 301)

XML file for the description of the objects in a POWERLINK Object Dictionary (also called XDD)

Note 1 to entry: This description contains metadata about the POWERLINK Objectsand about the POWERLINK Device.