1-16 PACSystems* RX3i PROFINET Controller Manual – December 2011 GFK-2571A
Glossary
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 are
then established for the different types of data to be exchanged.
In Ethernet, the transmission of a network message to all hosts on the network.
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.
Device Access Point. This access point is used to address an IO-Device as an entity.
An Address Resolution Protocol (ARP) request sent by the host to resolve its own IP
address.
General Station Description Markup Language - definition of PROFINET Device
Characteristics.
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.
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.
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.
PROFINET abbreviation for the IOCS and/or IOPS (see above).
Link Layer Discovery Protocol. IEEE standardized protocol used by network devices to
advertise their identity and capabilities.
Media Redundancy Client. Within Media Redundancy Protocol, an MRC is responsible for
helping the MRM detect breaks/no breaks in the ring.
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.
Media Redundancy Protocol. An Ethernet protocol that provides redundant paths for
PROFINET-IO cyclic traffic by supporting a ring topology.
In Ethernet, the transmission of a network message to all hosts within a host group.
Network Management System. Executes applications that monitor and control managed
devices in an SNMP-managed network.
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.
In a PACSystems RX3i PROFINET network, a CPU Node is a node that has a
PACSystems RX3i CPU in its rack and is connected to the PROFINET network.
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