Siemens S7-400 - Properties and Services; Properties of the CP

CP 443-1 Advanced
Equipment Manual, 03/2023, C79000-G8976-C256-07
13
Properties and services
1
1.1 Properties of the CP
Application
The CP is intended for use in an S7-400 or S7400H (high availability) automation system. It
allows the S7400 / S7400H to be connected to Industrial Ethernet.
For information on the special features of tunneled H-connections, see section H-connections
over VPN (Page 78).
Security
Observe the security note on the CP firmware in Preface (Page 3).
The CP has the following interfaces:
• PROFINET interface (Ethernet interface)
A 4-port switch with IRT capability and with autocrossing, autonegotiation and
autosensing is integrated in the CP. The 4-port switch allows the integration of the CP in a
bus or a ring with media redundancy.
Each port of the switch is designed for simple diagnostics and is equipped with a
combined RXD/TXD / LINK dual LED. For special situations, each port can also be set to a
fixed mode manually using STEP 7, for example 10 or 100 Mbps half duplex / full duplex.
• Gigabit interface with security access
The CP also has an Ethernet interface complying with the gigabit standard IEEE 802.3ab.
This is independent of the PROFINET interface and supports autocrossing, autonegotiation
and autosensing. The gigabit interface can, for example, be used to connect to a PG/PC or
to a higherlevel company network.
The gigabit interface allows a secure connection to external networks via a firewall and
VPN. The CP provides the following protective function:
– Protection of the S7-400 station in which the CP is operated.
– Protection of the internal company networks connected to the PROFINET interface.
Each port can be disabled individually in the configuration.
Note
The following services or characteristics ar
e only available on the PROFINET interface:
•
PROFINET
•
Programmed communications connections (program block IP_CONFIG).