S7-1500 R/H-Cpus; Overview Of The Cpu Technical Specifications - Siemens SIMATIC S7-1500 System Manual

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
Data work-memory, max.
Code work-memory, max.
Plug-in load memory (SIMATIC
memory card), max.
I/O address area, max.
PROFINET IO interfaces
PROFINET interfaces
Processing time for bit operations 50 ns
Display screen size
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
IO devices that can be used on
the R/H CPUs, max:
Modules per rack, max.
Distance between CPUs, max.
The switchover time is the time starting with the failure or stop of the primary CPU until the backup CPU becomes the
1)
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.
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
CPU 1513R-1 PN CPU 1515R-2 PN
2.5 MB 4.5 MB
600 KB 1 MB
32 GB 32 GB
32 KB/32 KB 32 KB/32 KB
1 1
- 1
20 ns
3.45 cm 6.1 cm
50 (recommended: 50 (recommended:
max. 16) max. 16)
64 64
2 (PM and CPU) 2 (PM and CPU)
Depends on media Depends on media
converter used (with converter used (with
PROFINET cable, max. PROFINET cable, max.
100 m) 100 m)
System overview
4.3 S7-1500 R/H-CPUs
CPU 1517H-3 PN CPU 1518HF-4 PN
8 MB 60 MB
2 MB 9 MB
32 GB 32 GB
32 KB/32 KB 32 KB/32 KB
1 1
1 2
4 ns 4 ns
6.1 cm 6.1 cm
50 50
256 256
2 (PM and CPU) 2 (PM and CPU)
Depends on the syn­ Depends on the syn­
chronization module chronization module
used: max. 40 km used: max. 40 km
45