Siemens SIMATIC NET CP 343-1 Manual de usuario descargar pdf (Pagina 47)

Notes on configuration and operation

6.7 Media redundancy

CP 343-1

Manual, 10/2012, C79000−G8976−C201-07

6.6.3 Configured S7 connections cannot be operated if the IP address is assigned

over DHCP

Note

If you obtain the IP address using DHCP, any S7 connections you may have configured will

not work. Reason: The configured IP address is replaced during operation by the address

obtained with DHCP.

6.6.4 IP access protection using the IP access control list with a PROFINET IO

device

Note the following behavior if IP access protection is activated:

If the CP is configured as a PROFINET IO device, you will need to enter the IP address of

the PROFINET IO controller in the IP access control list.

With programmed communications connections, you should also note the following section:

IP access protection with programm

ed communication connections (Page 51)

6.7 Media redundancy

You can use the CP in a ring topology with media redundancy. The CP can only be a

redundancy client.

For more detailed information on configuration, refer to the online help of the "Media

redundancy" tab and Part A of the manual, see /1/ (Page 68).

6.8 Timeofday synchronization

General rules

The CP supports the two modes explained below for timeofday synchronization:

● SIMATIC mode

● NTP mode (NTP: Network Time Protocol)

No automatic changeover to daylight saving time is defined in NTP. As a result, you may

need to implement this changeover using a program application.

Project engineering

For more detailed information on configuration, refer to the online help of the "Time-of-day

synchronization" parameter group and in Part A of the manual /1/ (Page 68).

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Siemens SIMATIC NET CP 343-1 Manual de usuario Pagina 47