Siemens SIMATIC NET S7-400 User Manual

Properties and services
1.4 Further services and characteristics of the CP
CP 443-1 (EX30)
16 Manual, 03/2019, C79000-G8976-C255-05
establishment) is always initiated by a SIMATIC S5 or a device from another range /
PC.
– LOCK/UNLOCK with FETCH/WRITE services (CPU-dependent; see section
Requirements for use (Page 27))
●
Open TCP/IP communication
Open TCP/IP communication provides a program interface for the transfer of connection-
oriented and connectionless services. The establishment and termination of connections
is initiated here only via the "dynamic" program interface.
STEP 7 provides a UDT for the connection parameter assignment as well as four FBs for
high-speed data exchange.
The CP supports communication via ISO-on-TCP connections for this interface.
1.4
Further services and characteristics of the CP
●
Media redundancy
Within an Ethernet network with a ring topology, the CP supports the media redundancy
protocol MRP. You can assign the role of redundancy manager to the CP.
●
Timeofday synchronization over Industrial Ethernet 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.
Synchronization using the SIMATIC mode is only possible on the PROFINET
interface.
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 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 the interface being used. Online address assignment is made
in STEP 7.
●
SNMP agent
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,
LLDP MIB, Automation System MIB and MRP Monitoring MIB.

Siemens SIMATIC NET S7-400 Specifications

General

Brand	Siemens
Model	SIMATIC NET S7-400
Category	Conference System
Language	English