Glossary - GE PACSystems RX3i User Manual

Chapter 1. Introduction
1.7

Glossary

AR Application Relationship. PROFINET term for a relationship that is established between an
IO-Controller/Supervisor and IO-Device. For any data to be exchanged between an IO-
Controller/Supervisor and a given IO-Device, an Application Relationship must be established.
Within the Application Relationship, various Communication Relationships (CRs) are then
established for the different types of data to be exchanged.
Broadcast In Ethernet, the transmission of a network message to all hosts on the network.
CLI Command Line Interface
CPU Node In a PACSystems RX3i PROFINET network, a CPU Node is a node in which a PACSystems RX3i CPU
is connected to the PROFINET network.
CR Communication Relationship. PROFINET term for a channel that is established within an
Application Relationship (AR) to transfer specific data between an IO-Controller/Supervisor and a
given IO-Device. Multiple CRs are established within an AR to transfer data.
Critical An Ethernet port connection on the PROFINET I/O Controller that is configured as a critical port.
Network Port When the last Critical Network Port is disconnected from its network, a diagnostic fault is logged.
In a redundancy system where the PROFINET I/O Controller is controlling redundant devices, this
results in a CPU redundancy role-switch with the CPU placed into Stop/Fault mode.
DAP Device Access Point. This access point is used to address an IO-Device as an entity.
Gratuitous An Address Resolution Protocol (ARP) request sent by the host to resolve its own IP Address.
ARPs
GSDML General Station Description Markup Language - definition of PROFINET Device Characteristics.
IOC PROFINET IO-Controller
IOD PROFINET IO-Device
IOCR Input Output Communication Relationship – describes the type (input/output) and amount of I/O
data to be transferred, the sequence of the transfers and the transfer cycle between a PROFINET
IO-Controller (or IO-Supervisor) and a PROFINET IO-Device.
IOCS PROFINET Input/Output Consumer Status is transmitted on the PROFINET network to provide
feedback on Input Data for an IO controller and Output Data for an IO device.
IOPS PROFINET Input/Output Provider Status is transmitted on the PROFINET network to provide
feedback on Output Data for an IO controller and the Input Data for an IO device.
IOxS PROFINET abbreviation for the IOCS and/or IOPS (see above).
LLDP Link Layer Discovery Protocol. IEEE standardized protocol used by network devices to advertise
their identity and capabilities.
LLDPDU Link Layer Discovery Protocol Data Unit.
MAC Media Access Control address (MAC address)
MAU Medium Attachment Unit
MIB Management Information Basis
MRC Media Redundancy Client. Within Media Redundancy Protocol, an MRC is responsible for helping
the MRM detect breaks/no breaks in the ring.
MRM Media Redundancy Manager. Within Media Redundancy Protocol, an MRM is responsible for
ensuring that the ring does not have a closed loop, while simultaneously ensuring maximal
connectivity between nodes on the ring.
MRP Media Redundancy Protocol. An Ethernet protocol that provides redundant paths for PROFINET-IO
cyclic traffic by supporting a ring topology.
Multicast In Ethernet, the transmission of a network message to all hosts within a host group.
NOS Name of Station
OID Object Identifier
Phase If the IOCR Update Period is greater than the Send Clock time, the Update Period is divided into
multiple phases where each phase is equal to one Send Clock.
28 PACSystems* RX3i & RSTi-EP PROFINET IO-Controller User Manual GFK-2571N