Siemens Simatic S7-1500H - S7-1500 R;H-Cpus; Overview of the CPU Technical Specifications

4.3 S7-1500 R/H-CPUs
The S7-1500R/H redundant system tolerates the failure of one of the two R- or H-CPUs. If the
primary CPU fails, the backup CPU takes over control of the process as the new primary CPU at
the point of the interruption.
All relevant data is permanently synchronized between the CPUs over the redundancy
connections between primary CPU and backup CPU.
The primary CPU and the backup CPU execute the user program in parallel.
The display of the CPU shows you the control and status information in various menus. Quick
access to diagnostic alarms minimizes plant downtimes in the event of a service call.
For effective commissioning and fast optimization of drives and controls, the CPUs support
trace functions for all CPU tags.
4.3.1 Overview of the CPU technical specifications
The table below sets out the main technical specifications for the S7‑1500R/H CPUs.
Table 4-4Overview of the R/H-CPU technical specifications
CPU 1513R-1 PN CPU 1515R-2 PN CPU 1517H-3 PN CPU 1518HF-4 PN
Data work-memory, max. 2.5 MB 4.5 MB 8MB 60MB
Code work-memory, max. 600KB 1 MB 2MB 9MB
Plug-in load memory (SIMATIC
memory card), max.
32GB 32GB 32GB 32GB
I/O address area, max. 32KB/32KB 32KB/32KB 32KB/32KB 32KB/32KB
PROFINET IO interfaces 1 1 1 1
PROFINET interfaces - 1 1 2
Processing time for bit operations 50 ns 20ns 4 ns 4 ns
Display screen size 3.45cm 6.1cm 6.1cm 6.1cm
Applicable PROFINET devices in
the PROFINET ring of the R/H sys
tem, max:
• IO devices
• S7-1500R/H CPUs
• Switches
• S7-1500 CPUs (as of V2.5)
• HMI devices
50 (recommended:
max. 16)
50 (recommended:
max. 16)
50 50
IO devices that can be used on
the R/H CPUs, max:
64 64 256 256
Modules per rack, max. 2 (PM and CPU) 2 (PM and CPU) 2 (PM and CPU) 2 (PM and CPU)
Distance between CPUs, max. Depends on media
converter used (with
PROFINET cable, max.
100m)
Depends on media
converter used (with
PROFINET cable, max.
100m)
Depends on the syn
chronization module
used: max. 40km
Depends on the syn
chronization module
used: max. 40km
1)
The switchover time is the time starting with the failure or stop of the primary CPU until the backup CPU becomes the
primary CPU and assumes control of the process as the primary CPU at the point of interruption. The switchover time can
lengthen the cycle time.
45
System overview
4.3 S7-1500 R/H-CPUs
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD