Table of contents
CP 343-1
10 Manual, 12/2018, C79000−G8976−C201-08
6.6.3 Effects of multicast communication on RT communication ................................................... 50
6.7 IP configuration ...................................................................................................................... 50
6.7.1 Detection of double IP addressing in the network ................................................................. 50
6.7.2 Obtain IP address vie DHCP: CP STOP on expiry of the lease ............................................ 51
6.7.3 Configured S7 connections cannot be operated if the IP address is assigned over
DHCP ..................................................................................................................................... 51
6.7.4 IP access protection using the IP access control list with a PROFINET IO device ............... 51
6.8 Media redundancy ................................................................................................................. 51
6.9 Timeofday synchronization .................................................................................................... 52
6.10 SNMP agent ........................................................................................................................... 52
6.11 Possible security gaps on standard IT interfaces: preventing unauthorized access ............. 54
6.12 Programmed communication connections ............................................................................. 55
6.12.1 Programmed communication connections with FB55 IP_CONFIG ....................................... 55
6.12.2 Programmed communications connections - assigning parameters to the ports .................. 55
6.12.3 IP access protection with programmed communication connections .................................... 55
6.13 Permitted length of ICMP packets ......................................................................................... 56
6.14 Downtime if an S7 connection aborts .................................................................................... 56
7 Service and maintenance ...................................................................................................................... 57
7.1 Memory reset / reset to factory defaults ................................................................................ 57
7.2 Memory reset - ACL ............................................................................................................... 58
7.3 Loading new firmware ............................................................................................................ 58
7.4 Replacing a module ............................................................................................................... 59
7.4.1 Replacing older modules ....................................................................................................... 60
7.4.2 Module replacement / upgrading ........................................................................................... 60
7.4.3 Replacing a module without a programming device .............................................................. 62
8 Technical specifications ........................................................................................................................ 65
A Approvals ............................................................................................................................................. 67
B References ........................................................................................................................................... 71
Index .................................................................................................................................................... 77
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