1-16
PACSystems* RX3i PROFINET Controller Manual
– December 2011
GFK-2571A
1
Glossary
AR
A
pplication
R
elationship. 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.
Broadcas
t
In Ethernet, the transmission of a network message to all hosts on the network.
CR
C
ommunication
R
elationship. 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.
DAP
D
evice
A
ccess
P
oint. 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
G
eneral
S
tation
D
escription
M
arkup
L
anguage - definition of PROFINET Device
Characteristics.
IOC
PROFINET
IO
-
C
ontroller
IOD
PROFINET
IO
-
D
evice
IOCR
I
nput
O
utput
C
ommunication
R
elationship
– 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
I
nput/
O
utput
C
onsumer
S
tatus 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
I
nput/
O
utput
P
rovider
S
tatus 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
L
ink
L
ayer
D
iscovery
P
rotocol. IEEE standardized protocol used by network devices to
advertise their identity and capabilities.
MRC
M
edia
R
edundancy
C
lient. Within Media Redundancy Protocol, an MRC is responsible for
helping the MRM detect breaks/no breaks in the ring.
MRM
M
edia
R
edundancy
M
anager. 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
M
edia
R
edundancy
P
rotocol. 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.
NMS
N
etwork
M
anagement
S
ystem. Executes applications that monitor and control managed
devices in an SNMP-managed network.
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.
CPU Node
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.
