Siemens CPU 410-5H Process Automation - Communication Via Point-To-Point CP on the ET 200 M

Supplementary information
16.9 Communication via S7 connections
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
243
The following figure shows such a configuration.
Figure 16-11 Example of redundancy with fault-tolerant systems and a redundant bus system with
redundant standard connections
Response to failure
Double errors in the fault-tolerant system (i.e., CPUa1 and CPa 2) or in the standard system
(CPb1 and CPb2), and single errors in the standard system (CPUb1) lead to a total failure of
communication between the systems involved (see previous figure).
16.9.3
Communication via point-to-point CP on the ET 200M
Connection via ET 200M
Links from fault-tolerant systems to single-channel systems are often possible only by way of
point-to-point connections, as many systems offer no other connection options.
In order to make the data of a single-channel system available to CPUs of the fault-tolerant
system as well, the point-to-point CP, i.e., CP 341, must be installed in a distributed rack
along with two IM 153-2 modules.