Communications processors for SIMATIC S7
8.4 Communications processors for SIMATIC S7-400
Industrial Ethernet
System Manual, 09/2019, C79000-G8976-C242-10
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● CP 443-1 Advanced with security function: Security of the system against unauthorized
access by
– Central access protection for any device within an automation cell, for example, by
secure authentication of the network nodes
– Secure remote access via Internet thanks to data encryption (VPN)
– Data integrity check
– Traceability with data logging based on standard IT mechanisms (Syslog)
● SIPLUS CP 443-1 Advanced
The SIPLUS CP 443-1 module is intended for environmental loads at ambient
temperatures of 0°C to +60°C.
CP 443-1 RNA
The CP 443-1 RNA is designed to connect a SIMATIC S7-400 system to Industrial Ethernet
networks. The special feature of this device is support of the redundancy protocol PRP
(Parallel Redundancy Protocol). This allows the connection of devices to redundant Ethernet
networks. In addition to this fault-tolerant systems (known as H systems) are supported. The
device has the following characteristics and functions:
● Time-of-day synchronization over the RNA interface using the following configurable
modes:
– SIMATIC mode
The CP receives MMS timeofday messages and synchronizes its local time.
You can choose whether or not the time of day is forwarded. You can also decide on
the direction in which it is forwarded.
or
– NTP mode (NTP: Network Time Protocol)
The CP sends timeofday queries at regular intervals to an NTP server and
synchronizes its local time of day.
The time can also be forwarded automatically to the CPU modules in the S7 station
allowing the time to be synchronized in the entire S7 station.
● Addressable with the factory-set MAC address
To assign the IP address to a new CP (direct from the factory), it can be accessed using
the preset MAC address on port X2P1 of the RNA interface. The online address
assignment is made in STEP 7.
● SNMP agent on the RNA interface
The CP supports data queries via SNMP in version V1 (Simple Network Management
Protocol). It delivers the content of certain MIB objects according to the MIB II standard
(RFC 1213), PRP-MIB IEC62439 (IEC-62439-3-MIB) and Automation MIB.
● Module access protection
To protect the module from accidental or unauthorized access, protection can be
configured at various levels.
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