Other Services - Siemens SIMATIC NET S7-CPs Manual

1 Properties / Services
− LOCK/UNLOCK with FETCH/WRITE services;
− Connection diagnostics using the user program
1.3

Other services

Within an Ethernet network with a ring topology, the CP supports the media
redundancy protocol MRP. You can assign the role of redundancy client to the
CP. There must be another node in the ring other than the MRP redundancy
manager.
S 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. +/− 1 second)
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.
+/− 1 second).
S Addressing using a factory-set MAC address
The CP can be reached over the default MAC address to allow an IP address to
be assigned.
S SNMP Agent
The CP supports data queries over SNMP version V1 (Simple Network
Management Protocol). It delivers the content of certain MIB objects according
to the MIB II standard and LLDP MIB.
S Time of day for the diagnostic buffer
If a time master exists (using the NTP or SIMATIC mode), the time for
CP-internal diagnostic buffer is synchronized over the LAN.
S Module access protection
To protect the module form accidental or unauthorized access, protection can
be configured at various levels.
S IP configuration
For the PROFINET 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.
B−6
CP 343-1 Lean for Industrial Ethernet / Manual Part B
C79000-G8976-C198-06
Release 09/2009