System overview
2.3 S7-1500 R/H-CPUs
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
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2.3
S7-1500 R/H-CPUs
The S7-1500R/H redundant system tolerates the failure of one of the two R- or H-CPUs in
the PROFINET ring. 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.
2.3.1
Overview of the CPU technical specifications
The table below sets out the main technical specifications for the S7-1500 R/H CPUs.
Table 2- 4
Overview of the R/H-CPU technical specifications
CPU 1513R-1 PN
CPU 1515R-2 PN
CPU 1517H-3 PN
Data work-memory, max.
1.5 MB
3 MB
8 MB
Code work-memory, max.
300 KB
500 KB
2 MB
Plug-in load memory (SIMATIC memory
card), max.
32 GB
32 GB
32 GB
I/O address area, max.
32 KB/32 KB
32 KB/32 KB
32 KB/32 KB
PROFINET IO interfaces
1
1
1
PROFINET interfaces
-
1
1
Processing time for bit operations
0.04
μs
0.03
μs
0.002
μs
Display screen size
3.45 cm
6.1 cm
6.1 cm
Suitable PROFINET devices (switches,
S7-1500R/H CPUs, S7-1500 CPUs
(V2.5 or later) and HMI devices) in the
PROFINET ring, max.
50 (recommended: max.
16)
50 (recommended: max.
16)
50
Suitable PROFINET devices (see
above) in the PROFINET ring and sepa-
rated with switches (line), max.
66
66
258
Modules per rack, max.
2 (PM/PS and CPU)
2 (PM/PS and CPU)
2 (PM/PS and CPU)
Distance between CPUs, max.
Depends on media con-
verter used (with
PROFINET cable, max.
100 m)
Depends on media con-
verter used (with
PROFINET cable, max.
100 m)
Depends on the synchro-
nization module used:
max. 10 km
Redundancy connections (synchroniza-
tion link)
PROFINET ring
PROFINET ring
Fiber-optic cable
System redundancy
Yes
Yes
Yes
Switchover time
1)
300 ms
300 ms
50 ms
1)
The switchover time is the time between failure of the primary CPU until the backup CPU takes over control of the
process as the primary CPU at the point of interruption. The switchover time can lengthen the cycle time.
Содержание Simatic S7-1500H
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