Siemens SIMATIC S7-400H System Manual page 7

14.8 Changing the CPU memory configuration .................................................................................239
14.8.1 Changing the CPU memory configuration .................................................................................239
14.8.2 Expanding load memory ............................................................................................................239
14.8.3 Changing the type of load memory ............................................................................................240
14.9 Reconfiguration of a module ......................................................................................................243
14.9.1 Reconfiguration of a module ......................................................................................................243
14.9.2 Step A: Editing parameters offline .............................................................................................244
14.9.3 Step B: Stopping the standby CPU............................................................................................244
14.9.4 Step C: Loading new hardware configuration in the standby CPU............................................245
14.9.5 Step D: Switch to CPU with modified configuration ...................................................................245
14.9.6 Step E: Transition to redundant state ........................................................................................247
15 Synchronization modules....................................................................................................................... 249
15.1 Synchronization modules for S7-400H ......................................................................................249
15.2 Installation of fiber-optic cables..................................................................................................252
15.3 Selecting fiber-optic cables ........................................................................................................254
16 S7-400 cycle and reaction times............................................................................................................ 259
16.1 Cycle time ..................................................................................................................................259
16.2 Calculating the cycle time ..........................................................................................................261
16.3 Different cycle times...................................................................................................................266
16.4 Communication load ..................................................................................................................268
16.5 Reaction time .............................................................................................................................271
16.6 Calculating cycle and reaction times .........................................................................................277
16.7 Examples of calculating the cycle and reaction times ...............................................................278
16.8 Interrupt reaction time ................................................................................................................281
16.9 Example of calculation of the interrupt reaction time .................................................................283
16.10 Reproducibility of delay and watchdog interrupts ......................................................................284
17 Technical data ....................................................................................................................................... 285
17.1 Technical specifications of the CPU 412-3H; (6ES7 412-3HJ14-0AB0) .................................285
17.2 Technical specifications of the CPU 414-4H; (6ES7 414-4HM14-0AB0) ................................293
17.3 Technical specifications of the CPU 417-4H; (6ES7 417-4HT14-0AB0) .................................301
17.4 Technical specifications of the memory cards ...........................................................................309
17.5 Runtimes of the FCs and FBs for redundant I/Os......................................................................310
A Characteristic values of redundant automation systems ........................................................................ 311
A.1 Basic concepts ...........................................................................................................................311
A.2 Comparison of MTBF for selected configurations......................................................................316
A.2.1 System configurations with centralized I/Os ..............................................................................316
A.2.2 System configurations with distributed I/Os...............................................................................317
A.2.3 Comparison of system configurations with standard and fault-tolerant communication............319
B Stand-alone operation ........................................................................................................................... 321
C Migrating from S5-H to S7-400H............................................................................................................ 327
C.1 General aspects.........................................................................................................................327
C.2 Configuration, programming and diagnostics ............................................................................328
S7-400H
System Manual, 09/2007, A5E00267695-03
Table of contents
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