Siemens SIMATIC S7-400H System Manual page 10

Table of contents
Table 16-5 Portion of the process image transfer time, CPU 417-4H........................................................ 264
Table 16-6 Extension of the cycle time ....................................................................................................... 264
Table 16-7 Operating system execution time at the scan cycle checkpoint ............................................... 265
Table 16-8 Cycle time extension due to nested interrupts .......................................................................... 265
Table 16-9 Direct access of the CPUs to I/O modules................................................................................ 275
Table 16-10 Direct access of the CPUs to I/O modules in the expansion unit with local link ....................... 275
Table 16-11 Direct access of the CPUs to I/O modules in the expansion unit with remote link ................... 276
Table 16-12 Example of calculating the reaction time .................................................................................. 277
Table 16-13 Process and interrupt reaction times; maximum interrupt reaction time without
communication .......................................................................................................................... 281
Table 16-14 Reproducibility of time-delay and cyclic interrupts of the CPUs ............................................... 284
Table 17-1 Runtimes of the blocks for redundant I/Os................................................................................ 310
Figures
Figure 2-1 Operating objectives of redundant automation systems............................................................. 21
Figure 2-2 Totally integrated automation solutions with SIMATIC ............................................................... 23
Figure 2-3 Example of redundancy in a network without an error or fault.................................................... 24
Figure 2-4 Example of redundancy in a 1-of-2 system with error/fault......................................................... 24
Figure 2-5 Example of redundancy in a 1-out-of-2 system with total failure ................................................ 24
Figure 3-1 Overview ..................................................................................................................................... 26
Figure 3-2 Hardware of the S7-400H base system ...................................................................................... 28
Figure 3-3 User documentation for fault-tolerant systems ........................................................................... 33
Figure 4-1 Hardware installation................................................................................................................... 36
Figure 5-1 Arrangement of the operator controls and displays on the CPU 412-3H ................................... 39
Figure 5-2 Layout of the control and display elements of the CPU 414-4H/417-4H .................................... 40
Figure 5-3 Jack ............................................................................................................................................. 43
Figure 5-4 Mode selector switch settings ..................................................................................................... 49
Figure 5-5 Design of the memory card ......................................................................................................... 54
Figure 7-1 Diagnostics with CPU 41xH ........................................................................................................ 70
Figure 7-2 Diagnostic addresses for DP master and DP slave.................................................................... 71
Figure 7-3 DP slave properties..................................................................................................................... 77
Figure 8-1 Synchronizing the subsystems ................................................................................................... 81
Figure 8-2 System and operating modes of the fault-tolerant system.......................................................... 83
Figure 9-1 Sequence of link-up and update ................................................................................................. 96
Figure 9-2 Update sequence ........................................................................................................................ 97
Figure 9-3 Example of minimum signal duration of an input signal during the update ................................ 98
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System Manual, 09/2007, A5E00267695-03
S7-400H