Siemens SIMATIC S7-400H System Manual page 15

Figures
Figure 2-1 Operating objectives of redundant automation systems..............................................................25
Figure 2-2 Integrated automation solutions with SIMATIC............................................................................27
Figure 2-3 Example of redundancy in a network without error......................................................................28
Figure 2-4 Example of redundancy in a 1-out-of-2 system with error ...........................................................29
Figure 2-5 Example of redundancy in a 1-out-of-2 system with total failure .................................................29
Figure 3-1 Overview ......................................................................................................................................32
Figure 3-2 Hardware of the S7-400H basic system......................................................................................34
Figure 3-3 User documentation for fault-tolerant systems ............................................................................40
Figure 4-1 Hardware assembly .....................................................................................................................42
Figure 5-1 Arrangement of the control and display elements on CPU 41x-5H PN/DP.................................47
Figure 5-2 Jack connector .............................................................................................................................50
Figure 5-3 Mode switch positions..................................................................................................................60
Figure 5-4 Design of the memory card..........................................................................................................65
Figure 7-1 Diagnostics with CPU 41xH .........................................................................................................92
Figure 7-2 Diagnostics addresses for DP master and DP slave ...................................................................93
Figure 8-1 Configuration example of system redundancy with media redundancy ....................................105
Figure 8-2 S7-400H system with IO devices connected in system redundancy .........................................106
Figure 8-3 System redundancy in different views .......................................................................................107
Figure 8-4 PN/IO with system redundancy..................................................................................................109
Figure 8-5 PN/IO with system redundancy..................................................................................................110
Figure 9-1 Properties - DP slave .................................................................................................................116
Figure 10-1 Memory areas of the S7-400H CPUs ........................................................................................117
Figure 11-1 Synchronizing the subsystems ..................................................................................................122
Figure 11-2 System and operating states of the fault-tolerant system..........................................................130
Figure 12-1 Sequence of link-up and update ................................................................................................144
Figure 12-2 Update sequence.......................................................................................................................145
Figure 12-3 Example of minimum signal duration of an input signal during the update ...............................146
Figure 12-4 Meanings of the times relevant for updates...............................................................................156
Figure 12-5 Correlation between the minimum I/O retention time and the maximum inhibit time for
priority classes > 15 ...................................................................................................................160
Figure 13-1 Single-channel switched distributed I/O configuration at the PROFIBUS DP interface ............173
Figure 13-2 Single-channel switched distributed I/O configuration at the PROFINET interface...................174
Figure 13-3 Redundant I/O in central and expansion devices ......................................................................178
Figure 13-4 Redundant I/O in the one-sided DP slave .................................................................................179
Figure 13-5 Redundant I/O in the switched DP slave ...................................................................................180
S7-400H
System Manual, 03/2012, A5E00267695-11
Table of contents
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