Siemens SIMATIC ET 200AL, System Manual

Page: 1493 / 2255

Communication
372
Function Manual, 05/2021, A5E03735815-AJ
Routing
11
11.1 Overview of the routing mechanisms of S7-1500 CPUs
The following table gives an overview of the routing mechanisms of the S7-1500 CPU.
Routing mechanism Description Applications Section
S7 routing S7 routing is the transfer of
data beyond S7 subnet bound-
aries. You can send information
from a transmitter to a receiver
across several s7 subnets.
Download user programs
Load hardware configuration
Execute testing and diagnostics
functions
S7 routing (Page 373)
IP forwarding IP forwarding is a function of
devices to forward IP packets
between two connected IP
subnets.
Simple access from the control
level to the field level for con-
figuration and parameter as-
signment of devices, e.g. via
PDM or Web browser.
Simplified integration of devic-
es for remote access, e.g. for
diagnostics during remote
maintenance or firmware up-
date.
IP forwarding
(Page 378)
Data record routing Data can be sent over
PROFINET from an engineering
station to field devices via
multiple networks. Since the
engineering station addresses
the field devices using stand-
ardized records and these rec-
ords are routed via S7 devices,
the term "data record routing"
is used to refer to this type of
routing.
Data record routing is used, for
example, when field devices of
different manufacturers are
used. The field devices are
addressed using standardized
data records ( PROFINET) for
configuration and diagnostics.
Data record routing
(Page 385)