D Glossary
A-302
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
ISO -on-TCP
Transport layer connection (layer 4 communication complying with ISO)
simulated on TCP.
On an ISO-on-TCP connection, messages can be exchanged in both directions.
TCP provides the data flow communication without segmenting the data into
messages. ISO, on the other hand, is message-oriented. With ISO-on-TCP, this
mechanism is simulated on TCP. This is described in RFC1006 (Request For
Comment).
ISO-on-TCP connections allow program/event-controlled communication via
Ethernet from a SIMATIC S7 PLC to
SIMATIC S7 PLC with Ethernet CP
SIMATIC S5 PLC with Ethernet CP
PC/PG with Ethernet CP
any system
ISO Transport Connection
Communication connection of the transport layer (with the CP/COM 143
previously S5S5 connection).
ISO transport connections allow program/event-controlled communication on
Industrial Ethernet between SIMATIC S7 PLCs and
SIMATIC S7 PLC with Ethernet CP
SIMATIC S5 with an Ethernet CP (e.g. CP 143 or CP 1430)
PC/PG with Ethernet CP (for example CP 1613)
Any system using the ISO transport protocol (ISO 8073)
The transfer of blocks of data on an ISO transport connection is bi-directional.
MAC address
Address to distinguish between different stations connected to a common
transmission medium (Industrial Ethernet).
Media Access Control (MAC)
Mechanisms for controlling access by a station to a common transmission
medium shared with other stations.
RFC1006
see ISO-on-TCP
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