Glossary - GE RX3i PROFINET User Manual

Chapter 1. Introduction

Glossary

1.8
AR Application Relationship. PROFINET term for a relationship that is established between an IO-Controller/
IO-Supervisor and IO-Device. For any data to be exchanged between an IO-Controller/IO-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.
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/IO-Supervisor and a given IO-Device.
Multiple CRs are established within an AR to transfer data.
DAP Device Access Point. This access point is used to address an IO-Device as an entity.
Gratuitous ARPs An Address Resolution Protocol (ARP) request sent by the host to resolve its own IP Address.
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.
16 PACSystems* RX3i PROFINET IO-Scanner User Manual GFK-2737F