Properties / services
1.3 Other services
CP 343-1 ERPC
Manual, 03/2010, C79000-G8976-C239-02
9
1.3 Other services
Other services
● Time-of-day synchronization over Industrial Ethernet using the following configurable
modes:
– SIMATIC mode
The CP receives MMS time messages and synchronizes its local time and the time of
the CPU.
(accuracy approx. +/- 0.5 seconds)
You can choose whether or not the time of day is forwarded. The forwarding direction
can also be selected (station → LAN or LAN → station).
or
– NTP mode (NTP: Network Time Protocol)
The CP sends time-of-day queries at regular intervals to an NTP server and
synchronizes its local time of day and the time of the CPU (accuracy approx. +/- 0.5
seconds).
● Addressing using a factory-set MAC address
The CP can be reached via the default MAC address to allow an IP address to be
assigned.
● SNMP agent
The CP supports data queries over SNMP in version V1. It delivers the content of certain
MIB objects according to the MIB II standard and LLDP MIB.
● Time of day for the diagnostic buffer
If a time master exists (using the NTP or SIMATIC mode), the time for CPinternal
diagnostic buffer is synchronized over the backplane bus or LAN.
● Module access protection
To protect the module from accidental or unauthorized access, protection can be
configured at various levels.
● IP access protection (IP-ACL)
Communication via the CP of the local S7 station can be restricted to partners with
specific IP addresses.
● IP configuration
For the Ethernet interface, you can configure how and with which method the CP is
assigned the IP address, the subnet mask and the address of a gateway.
As an alternative to STEP 7, the CP can be assigned the connection configuration via a
block interface in the user program (FB55: IP_CONFIG) (does not apply to S7
connections).
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