Redundancy Scenarios; Introduction - Siemens SIMATIC S7-1500 System Manual

Application planning

6.4 Redundancy scenarios

Advantages/benefits
The configuration is suitable for all applications that do not require any further devices at the
PROFINET interface X1 P1R/X1 P2R of the H-CPUs.
Example: In a plant, the S7-1500H redundant system communicates with third-party devices
via Modbus/TCP. You connect the PROFINET lines to the external devices to the PROFINET
interfaces X2 of the H-CPUs.
Configuration S7-1500H without further devices at the PROFINET interface X1 of the H-CPUs
①
②
③
Figure 6-30
6.4 Redundancy scenarios
6.4.1

Introduction

Introduction
This section describes possible redundancy scenarios on the basis of various different
configuration variants. The redundancy scenarios do not result in process restrictions. In the
examples shown, the failures are tolerated by the redundant system.
The following convention applies:
Figure 6-31
172
CPU 1
CPU 2
Two fiber-optic cables (redundancy connections)
S7-1500H configuration with additional devices
Yellow traffic light
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF