PROFINET general information
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3.4 PROFINET IO – Services
● Cyclic data exchange of process data
– RT communication within a network, no use of UDP/IP
– RT communication between networks, using UDP/IP *** not supported! ***
– IRT communication for deterministic and clock-synchronized data
transmission *** not supported! ***
– Multicast Communication Relation,
with RT- and IRT-communication based on the Provider/Consumer model
*** not supported! ***
● Acyclic data exchange of record data (read- / write services)
– Parameterization of the encoTRive during system boot
– Reading of diagnostic information
– Reading of identification information according to the
„Identification and Maintenance (I&M) Functions“
– Reading and writing of the encoTRive object directory
3.5 PROFINET IO – Protocols
EDD, Ethernet Device Driver:
General mechanisms for sending/receiving
ACP, Alarm Consumer Provider: Processing of alarms
CM, Context Management: Structure and administration of application- and
communication relations between IO-Devices and IO-Controller
DCP, Discovery and Control Program:
Assignment of IP addresses and device names over Ethernet
LLDP, Link Layer Discovery Protocol: For topology identification
and others
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