Op Mode: Connecting Hmi/ Monitoring Devices Via Industrial Ethernet; S7 Communication Via Industrial Ethernet - Siemens S7-300 Configuration Manual

Communication via Ethernet CPs in S7 stations

1.5 S7 communication via Industrial Ethernet

1.4.2

OP mode: Connecting HMI/ monitoring devices via Industrial Ethernet

Requirement
Operation allowing operator control/monitoring is possible when the following conditions are
met:
● The following are installed in the HMI/monitoring device:
– an Ethernet CP;
● The CPs in the S7 stations are supplied with a MAC/IP address (use the default MAC
With CPs that have several independent interfaces, for example 1 PROFINET interface and
1 gigabit interface, you can connect your PG or engineering station to the gigabit interface
when networking the PROFINET interface with your plant. You can access the subnet of one
interface from the other interface.
Procedure
To be able to use S7 communication, address the required module in the SIMATIC S7 PLC
on your HMI/monitoring device.
For more detailed information on the OP mode, refer to /4/ (Page 229).
1.5 S7 communication via Industrial Ethernet
Application
S7 communication via Industrial Ethernet permits program-controlled communication using
program blocks for S7 communication via configured S7 connections. The amount of user
data per job is as follows for communication via Ethernet CPs:
● up to 64 Kbytes for S7-400
● up to 32 Kbytes for S7-300
The Ethernet CP acts as an "S7 communication relay" by forwarding the S7 functions via
Industrial Ethernet. Depending on the configuration of the Ethernet CP, data transfer is on
the basis of the ISO transport or the ISOonTCP protocol (TCP/IP with RFC 1006).
From a user perspective, S7 communication via PROFIBUS and Industrial Ethernet is
identical.
24
– SOFTNET S7 for Ind. Ethernet or software from the SIMATIC NET CD.
address or set an IP address).
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13