Siemens SIMATIC S7-400H System Manual page 500

Index
D
Data consistency, 111
Determining memory requirements, 69
SM 321
Example of an interconnection,
SM 321
Example of an interconnection,
SM 321
Example of an interconnection,
SM 321
Example of an interconnection,
Diagnostic address, 93
Diagnostic buffer, 59
Diagnostics
Evaluating, 92
Digital output
Fault-tolerant, 197, 203
Direct current measurement, 202
Direct I/O access, 373
Discrepancy
Digital input modules, 194
Discrepancy time, 194, 198
SM 422
Example of an interconnection,
SM 322
Example of an interconnection,
SM 322
Example of an interconnection,
Documentation, 40
DP interface, 71
DP master
Diagnostics using LEDs, 91
Diagnostics with STEP 7, 91
DP master system
Startup, 89
DPV1, 89
DPV1 and EN 50170, 90
DPV1 master, 89
DPV1 mode, 90
DPV1 slaves, 89
E
EN 50170, 89
Encoders
Double redundant, 196
Error LEDs
All CPUs, 56
CPU 412-5H, 58
CPU 414-5H, 58
CPU 416-5H, 58
500
CPU 417-5H, 58
Error messages, 52
Execution time
Cycle control, 363
Operating system, 363
Process image update, 359
User program, 358
Expanded memory configuration, 148
Expanding the load memory, 65
External backup voltage, 50
External diodes, 197
EXTF, 56
F
Factory settings, 81
Fail-safe, 25
Failure of a CPU, 44
Failure of a fiber-optic cable, 44
Failure of a power supply module, 44
Failure of a redundancy node, 29
Failure of components, 265
in central and expansion racks, 265
of distributed I/Os, 276
Fault-tolerant, 25
Fault-tolerant communication, 231
Fault-tolerant connections
Configuration, 245
Programming, 236, 246
Fault-tolerant station, 259
Fault-tolerant system
Starting, 43
FB 450 RED_IN, 182
FB 451 RED_OUT, 182
FB 452 RED_DIAG, 182
FB 453 RED_STATUS, 182
FC 450 RED_INIT, 182
FC 451 RED_DEPA, 182
Fiber-optic cable, 35
Cable pull-in, 347
Installation, 346
Replacement, 272
Selection, 349
Storage, 347
Firmware
Updating, 83
FLASH card, 67, 68
Flexible memory space, 119
FRCE, 56
Function modules, 457
Functional I/O redundancy, 182
System Manual, 03/2012, A5E00267695-11
S7-400H