Siemens SIMATIC S7-1500 System Manual page 77
Redundant system
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Also See for SIMATIC S7-1500:
- Function manual (402 pages) ,
- System manual (393 pages) ,
- Manual (188 pages)
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System overview
5.1 What is the S7-1500R/H redundant system?
Differences between S7-1500R and S7-1500H
Table 5- 1
S7-1500R and S7-1500H system differences
Performance
•
•
•
Hardware
•
•
•
•
•
Range
•
76
S7-1500R
CPU 1513R-1 PN
CPU 1515R-2 PN
Transfer rate of 100 Mbps (for synchronization
and communication)
Data work-memory:
–
CPU 1513R-1 PN: max. 2.5 MB
–
CPU 1515R-2 PN: max. 4.5 MB
Code work-memory:
–
CPU 1513R-1 PN: max. 600 KB
–
CPU 1515R-2 PN: max. 1 MB
The CPUs are identical in design with the re-
spective S7-1500 standard versions.
Synchronization of the CPUs takes place over
the PROFINET ring.
When you use PROFINET devices with more
than two ports (e.g. switch) in the PROFINET
ring of an R-system, then H-Sync forwarding is
mandatory for these devices.
H-Sync forwarding is recommended for all
devices in the PROFINET ring if you are using
PROFINET devices with only 2 ports in the
PROFINET ring of an R-system.
Part of the bandwidth on the PROFINET cable
is required for synchronization of the CPUs.
Less bandwidth is therefore available for
PROFINET IO communication.
Distance between the two R-CPUs:
–
Max. 100 m without media converter
–
Several kilometers with media converter
(depends on the media converter used)
S7-1500H
CPU 1517H-3 PN
CPU 1518HF-4 PN
•
Significantly greater performance than
S7-1500R due to:
–
Separate redundancy connections over fi-
ber-optic cable
–
High computing power
•
transfer rate of 1 Gbps (for synchronization)
•
Data work-memory:
–
CPU 1517H-3 PN: max. 8 MB
–
CPU 1518HF-4 PN: max. 60 MB
•
Code work-memory:
–
CPU 1517H-3 PN: max. 2 MB
–
CPU 1518HF-4 PN: max. 9 MB
•
The CPUs each have 2 optical interfaces.
•
The synchronization of the CPUs works inde-
pendently from the PROFINET network via op-
tical fiber.
•
The full bandwidth of the PROFINET cable is
available for PROFINET IO communication.
•
Distance between the two H-CPUs:
–
Maximum of 40 km (depends on the syn-
chronization modules used)
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
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