Table of contents
S7-1500R/H redundant system
6 System Manual, 01/2024, A5E41814787-AF
6.4.1 Introduction .................................................................................................................... 172
6.4.2 Failure of the primary CPU ............................................................................................... 173
6.4.3 Failure of the backup CPU ................................................................................................ 175
6.4.4 Failure of the PROFINET cable in the PROFINET ring .......................................................... 177
6.4.5 Failure of the primary CPU with communications processor .............................................. 179
6.4.6 Specific redundancy scenarios for S7-1500R ..................................................................... 180
6.4.6.1 Failure of a communications processor at the primary CPU ............................................... 180
6.4.7 Specific redundancy scenarios for S7-1500H .................................................................... 181
6.4.7.1 Failure of a redundancy connection in S7-1500H.............................................................. 181
6.4.7.2 Failure of both redundancy connections in S7-1500H > 55 ms apart ................................. 183
6.4.7.3 Failure of both redundancy connections and the PROFINET cable in the PROFINET ring ..... 185
6.4.7.4 Failure of the two PROFINET cables in the PROFINET ring on the backup CPU .................... 188
6.4.7.5 Failure of an interface module in an R1 device in a PROFINET ring..................................... 190
6.4.7.6 Failure of the two PROFINET lines in PROFINET ring 1 at the primary CPU with R1
devices ............................................................................................................................ 192
6.4.7.7 Failure of both PROFINET lines between two R1 devices in a line topology ........................ 194
6.4.7.8 Failure of a PROFINET line between two S2 devices in a line topology ............................... 196
6.4.7.9 Failure of a communications processor at the primary CPU ............................................... 197
6.5 Failure scenarios .............................................................................................................. 198
6.5.1 Failure of an IO device in the PROFINET ring ..................................................................... 199
6.5.2 Failure of a switch (with additional line topology) in the PROFINET ring ............................ 200
6.5.3 Specific failure scenarios with S7-1500R ........................................................................... 202
6.5.3.1 Two cable interruptions in the PROFINET ring in S7-1500R > 1500 ms apart ...................... 202
6.5.3.2 Two cable interruptions in the PROFINET ring in S7-1500R within ≤ 1500 ms .................... 204
6.5.3.3 Failure of the primary CPU when IO devices have failed in the PROFINET ring .................... 206
6.5.3.4 Failure of the backup CPU and failure of the CP communications processor at the
primary CPU .................................................................................................................... 208
6.5.4 Specific failure scenarios with S7-1500H .......................................................................... 210
6.5.4.1 Failure of both redundancy connections in S7-1500H ≤ 55 ms apart ................................. 210
6.5.4.2 Failure of one redundancy connection and the primary CPU in S7-1500H ......................... 213
6.5.4.3 Failure of the two PROFINET cables in the PROFINET ring at the primary CPU ..................... 214
6.5.4.4 Failure of the redundant system through safe state of the HF-CPUs .................................. 216
6.5.4.5 Failure of an interface module in an R1 device and of the PROFINET lines in two places
of a PROFINET ring. .......................................................................................................... 218
6.5.4.6 Failure of the primary CPU in PROFINET rings with R1, S2 and S1 devices .......................... 220
6.5.4.7 Failure of PROFINET lines in two places in a line topology with S2 devices ......................... 222
6.5.4.8 Failure of the communications processor at the primary CPU with failure of the backup
CPU ................................................................................................................................. 224
6.6 Hardware configuration ................................................................................................... 226
6.7 Using HMI devices ........................................................................................................... 228
6.8 System power supply ....................................................................................................... 231
6.8.1 Use of system power supplies
.......................................................................................... 231
6.8.2 Power balance calculation ................................................................................................ 234
7 Installation ......................................................................................................................................... 238
7.1 Basics .............................................................................................................................. 238
7.2 Installing the mounting rail .............................................................................................. 240
7.3 Installing the active backplane bus ................................................................................... 244
7.4 Installing the standard rail adapter ................................................................................... 244
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