Further Services And Characteristics Of The Cp - Siemens SIMATIC NET S7-400 Manual

1.4

Further services and characteristics of the CP

● Timeofday synchronization over the RNA interface using the following configurable
modes:
– SIMATIC mode
or
– NTP mode (NTP: Network Time Protocol)
● Addressable with the factoryset 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. Online address assignment
is made in STEP 7.
● SNMP agent on the RNA interface
The CP supports data queries over 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.
● IP access protection on the RNA interface (IPACL)
Using IP access protection gives you the opportunity of restricting communication over
the CP of the local S7 station to partners with specific IP addresses.
● Web diagnostics on the RNA interface
With the aid of Web diagnostics, you can read out the diagnostics data from a station
connected via the CP to a PG/PC with a Web browser.
The Web pages contain the following information:
– Module and status information
● Diagnostics buffer extract request
With the aid of a Web browser, the CP supports the option of obtaining an extract of the
diagnostics buffer containing the most recent diagnostics events of the CPUs and CPs
located in the same S7 station as the CP.
CP 443-1 RNA
Manual, 03/2019, C79000-G8976-C299-04
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.
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.
1.4 Further services and characteristics of the CP
Application and functions
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