Siemens SIMATIC CPU 410 System Manual page 8

Table of contents
17.3 Technical specifications of the SEC PO 800 ....................................................................... 295
18 Supplementary information .................................................................................................................. 297
18.1 Supplementary information on PROFIBUS DP ................................................................... 297
18.2 Supplementary information on diagnostics of the CPU 410 as PROFIBUS DP master ...... 298
18.3 System status lists for PROFINET IO .................................................................................. 301
18.4 Configuring with STEP 7 ...................................................................................................... 302
18.4.1 Rules for arranging fault-tolerant station components ......................................................... 302
18.4.2 Configuring hardware ........................................................................................................... 303
18.4.3 Assigning parameters to modules in a fault-tolerant station ................................................ 304
18.4.4 Recommendations for setting CPU parameters, fixed settings ........................................... 304
18.4.5 Networking configuration ..................................................................................................... 305
18.5 The STEP 7 user program ................................................................................................... 306
18.5.1 The user program................................................................................................................. 306
18.6 Programming device functions in STEP 7 ........................................................................... 308
18.7 Communication services ...................................................................................................... 308
18.7.1 Overview of communication services................................................................................... 308
18.7.2 PG communication ............................................................................................................... 310
18.7.3 OP communication ............................................................................................................... 310
18.7.4 S7 communication ............................................................................................................... 310
18.7.5 S7 routing ............................................................................................................................. 312
18.7.6 Data set routing .................................................................................................................... 316
18.7.7 SNMP network protocol ....................................................................................................... 317
18.7.8 Open Communication Via Industrial Ethernet ...................................................................... 318
18.8 Basics and terminology of fault-tolerant communication ..................................................... 321
18.9 Usable networks................................................................................................................... 325
18.10 Communication via S7 connections ..................................................................................... 325
18.10.1 Communication via S7 connections - one-sided mode........................................................ 326
18.10.2 Communication via redundant S7 connections ................................................................... 328
18.10.3 Communication via point-to-point CP on the ET 200M ....................................................... 329
18.10.4 Custom connection to single-channel systems .................................................................... 331
18.11 Communication via fault-tolerant S7 connections ................................................................ 332
18.11.1 Communication between fault-tolerant systems .................................................................. 334
18.11.2 Communication between fault-tolerant systems and a fault-tolerant CPU .......................... 337
18.11.3 Communication between fault-tolerant systems and PCs ................................................... 338
18.12 Consistent data .................................................................................................................... 340
18.12.1 Consistency of communication blocks and functions .......................................................... 340
18.12.2 Consistency rules for SFB 14 "GET" or read variable, and SFB 15 "PUT" or write
variable ................................................................................................................................. 340
18.12.3 Consistent reading and writing of data from and to DP standard slaves/IO devices ........... 341
18.13 Link-up and update sequence .............................................................................................. 343
18.13.1 Link-up sequence ................................................................................................................. 346
18.13.2 Update sequence ................................................................................................................. 347
18.13.3 Switch to CPU with modified configuration .......................................................................... 351
18.13.4 Disabling of link-up and update ............................................................................................ 352
18.14 The user program................................................................................................................. 353
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CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC