Siemens SIMATIC S7-400H System Manual page 5

10 Using I/Os in S7-400H ........................................................................................................................... 119
10.1 Using I/Os in S7-400H ...............................................................................................................119
10.2 Introduction ................................................................................................................................119
10.3 Using single-channel, one-sided I/Os ........................................................................................121
10.4 Using single-channel switched I/Os ...........................................................................................123
10.5 Connecting redundant I/Os ........................................................................................................127
10.5.1 Evaluating the passivation status ..............................................................................................149
10.6 Other options for connecting redundant I/Os.............................................................................151
11 Communication...................................................................................................................................... 157
11.1 Communication ..........................................................................................................................157
11.2 Fundamentals and basic concepts ............................................................................................158
11.3 Usable networks ........................................................................................................................161
11.4 Usable communication services ................................................................................................161
11.5 Communications via fault-tolerant S7 connections....................................................................162
11.5.1 Communication between fault-tolerant systems ........................................................................163
11.5.2 Communication between fault-tolerant systems and a fault-tolerant CPU ................................166
11.5.3 Communication between fault-tolerant systems and PCs .........................................................167
11.6 Communication via S7 connections...........................................................................................169
11.6.1 Communication via S7 connections - one-sided mode .............................................................169
11.6.2 Communication via redundant S7 connections .........................................................................172
11.6.3 Communication via a point-to-point CP on the ET200M ...........................................................173
11.6.4 Custom linking to single-channel systems.................................................................................174
11.7 Communication performance.....................................................................................................175
11.8 General issues in communication ..............................................................................................177
12 Configuring with STEP 7........................................................................................................................ 179
12.1 Configuring with STEP 7............................................................................................................179
12.2 Configuring with STEP 7............................................................................................................179
12.2.1 Rules for the assembly of fault-tolerant stations........................................................................180
12.2.2 Configuring hardware.................................................................................................................180
12.2.3 Assigning parameters to modules in a fault-tolerant station......................................................181
12.2.4 Recommendations for setting the CPU parameters ..................................................................182
12.2.5 Configuring networking ..............................................................................................................183
12.3 Programming device functions in STEP 7 .................................................................................184
13 Failure and replacement of components during operation ..................................................................... 185
13.1 Failure and replacement of components during operation ........................................................185
13.2 Failure and replacement of components during operation ........................................................186
13.2.1 Failure and replacement of a CPU ............................................................................................186
13.2.2 Failure and replacement of a power supply module..................................................................188
13.2.3 Failure and replacement of an input/output or function module ................................................189
13.2.4 Failure and replacement of a communication module...............................................................191
13.2.5 Failure and replacement of a synchronization module or fiber-optic cable ...............................192
13.2.6 Failure and replacement of an IM 460 and IM 461 interface module ........................................195
S7-400H
System Manual, 09/2007, A5E00267695-03
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