System overview
5.3 S7-1500 R/H-CPUs
S7-1500R/H redundant system
106 System Manual, 01/2024, A5E41814787-AF
More information
For more information on media redundancy, system redundancy S2, system redundancy R1
and switched S1 device can be found in the PROFINET Function Manual
(https://support.industry.siemens.com/cs/ww/en/view/49948856).
More information on MRP interconnection can be found in the PROFINET Function Manual
and in the configuration manual SCALANCE XM-400/XR-500 Web Based Management (WBM).
5.3.3 Safety
Increased security measures
Wherever faults can cause personal injury or material damage, special standards must be
applied to the safety of the entire plant. Special, plant-specific regulations exist for the safety
of the plant, which must also be taken into account by the operator when setting up the
control system.
For electronic controllers with safety responsibility, the measures that must be taken to
prevent or control errors are based on the risk posed by the plant. Above a specific hazard
potential, the operator must ensure that additional measures are implemented for the plant,
for example, by using fail-safe automation systems.
Fail-safe automation systems (F-systems) control processes and ensure that they are in a safe
state immediately after shutdown. In other words, F-systems control processes in which an
immediate shutdown does not endanger persons or the environment.
The fail-safe SIMATIC Safety system is available for implementing safety concepts in the area
of machine and personnel protection (e.g., for EMERGENCY STOP equipment when operating
machine tools and processing machines) and in the process industry (e.g. for performing
protective functions for I&C protective devices and burners).
Use the 1518HF-4 PN CPUs to integrate the F-functionality in S7-1500HF redundant systems.
SIMATIC Safety Integrated
For fail-safe operation of your plant, program the F-CPUs. Use the "STEP 7 Safety Advanced"
of the TIA Portal for this purpose. In combination with STEP 7, the F-CPU offers optimal
integration of fail-safe systems into your engineering environment; one controller, one
communication system and one engineering platform for standard and fail-safe automation:
• Integration of safety technology
• Instructions approved by German Technical Inspectorate for frequently required safety
applications
• Integration of safety functions up to SIL 3 in accordance with IEC 61508, SILCL 3 in
accordance with IEC 62061 and/or PL e and Category 4 in accordance with ISO 13849-1
• Uniform engineering for standard and safety automation
• Simple documentation of safety-related changes via the F change history in STEP 7 Safety
• Support in the acceptance of the safety program and no renewed acceptance of the safety
program after changes in the standard program
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