Siemens SIMATIC S7 400 Application Description page 5

Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
5.2.2 Load the application software into the panel .................................................. 51
6 Using the Application................................................................................... 54
6.1 Application case 1: Many time switches ........................................................ 54
6.2 Application case 2: Pulse chain ..................................................................... 63
Part C: Program Description ..................................................................................... 70
7 STEP 7 Program............................................................................................ 71
7.1 Absolute time switches ................................................................................... 71
7.1.1 Seven-day time switch.................................................................................... 71
7.1.2 One-month time switch ................................................................................... 71
7.2 Relative time switch ........................................................................................ 73
1.2 Special functions............................................................................................. 74
7.2.1 Summer/wintertime changeover ..................................................................... 74
7.2.2 Holidays/special days ..................................................................................... 75
8 HMI Interface ................................................................................................. 77
9 Changes in the STEP 7 Programs ............................................................... 77
9.1 What to do if a second time switch of the same type is needed? ................... 77
9.2 How can I get several switch-on/off times into one time switch block?........... 78
9.3 What to do if more holidays or special days are needed? .............................. 79
9.4 How can I save on Instance DBs?.................................................................. 80
Appendix: Connection of the SICLOCK radio clock ............................................... 81
Rev. B - final 19.07.2002
Warranty, Liability and Support
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