Siemens SIMATIC S7-400H - Page 16

Contents
xvi
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
Figures
1-1 Operating objectives of redundant programmable logic controllers 1-2. . . . .
1-2 Universal automation solutions with SIMATIC 1-4. . . . . . . . . . . . . . . . . . . . . . .
1-3 Example of redundancy in a network without malfunction 1-5. . . . . . . . . . . . .
1-4 Example of redundancy in a 2-out-of-2 system with malfunction 1-5. . . . . . .
1-5 Example of redundancy in a 2-out-of-2 system with total failure 1-5. . . . . . . .
2-1 Overview 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Hardware of the S7-400H base system 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3 User documentation for fault-tolerant systems 2-9. . . . . . . . . . . . . . . . . . . . . . .
3-1 Hardware configuration 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1 Layout of the controls and indicators of the CPU 414-4H/417-4H 4-2. . . . . . .
4-2 Positions of the mode selector 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-3 Design of the memory card 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-4 Fitting memory cards in the CPUs 4-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-5 Memory card 4-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-6 Overview: system configuration for modification
of the system during operation 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-7 Diagnostics with CPU 41x 4-37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-8 Diagnostics addresses for the DP master and DP slave 4-38. . . . . . . . . . . . . .
4-9 Data transmission without data consistency 4-43. . . . . . . . . . . . . . . . . . . . . . . . .
4-10 Data transmission without data consistency 4-44. . . . . . . . . . . . . . . . . . . . . . . . .
5-1 Synchronizing the subsystems 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2 System and operating modes of the fault-tolerant system 5-5. . . . . . . . . . . . .
6-1 Functional sequence of link-up and update 6-4. . . . . . . . . . . . . . . . . . . . . . . . . .
6-2 Process for update 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4 Significance of the times relevant during the update 6-15. . . . . . . . . . . . . . . . . .
6-5 Relationship between the minimum I/O retention time
and the maximum blocking time for priority classes > 15 6-20. . . . . . . . . . . . . .
7-1 Single-channel, one-way I/O configuration 7-3. . . . . . . . . . . . . . . . . . . . . . . . . .
7-2 Single-channel, switched ET 200M distributed I/O 7-6. . . . . . . . . . . . . . . . . . .
7-3 Redundant I/O in central- and expansion devices 7-10. . . . . . . . . . . . . . . . . . . .
7-4 Redundant I/O in the one-way DP slave 7-11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-5 Redundant I/O in the switched DP slave 7-12. . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-6 Redundant I/O in single mode 7-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-7 Fault-tolerant digital input module in a 1-out-of-2 configuration
with one sensor 7-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-8 Fault-tolerant digital input modules in a 1-out-of-2 configuration
with 2 sensors 7-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-9 Fault-tolerant digital output module in a 1-of-2 configuration 7-21. . . . . . . . . . .
7-10 Fault-tolerant analog input modules in a 1-out-of-2 configuration
with one sensor 7-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-11 Fault-tolerant analog input modules in a 1-out-of-2 configuration
with two sensors 7-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-12 Redundant analog output modules in a 1-of-2 structure 7-32. . . . . . . . . . . . . . .
7-13 Redundant one-way and switched I/Os 7-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-14 Flowchart for OB1 7-38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .