Siemens Simatic S7-1500R System Manual page 24

Differences between S7-1500R and S7-1500H
Table 2- 1 S7-1500R and S7-1500H system differences
Performance
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Hardware
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Range
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Configuration limits •
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S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
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. 1.5 MB
– CPU 1515R-2 PN: max. 3 MB
Code work-memory:
– CPU 1513R-1 PN: max. 300 KB
– CPU 1515R-2 PN: max. 500 KB
The CPUs are identical in design with the
respective S7-1500 standard versions.
Synchronization of the CPUs takes place over
the PROFINET ring.
The H-Sync forwarding function is recom-
mended for all nodes in the PROFINET ring.
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)
In the PROFINET ring: Max. 50 PROFINET
devices, including R-CPUs (max. 16
PROFINET devices recommended)
In the PROFINET ring and separated with
switches (line): Max. 66 PROFINET devices
(including R-CPUs)
2.1 What is the S7-1500R/H redundant system?
S7-1500H
CPU 1517H-3 PN
Significantly greater performance than
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S7-1500R due to
– separate redundancy connections over fi-
ber-optic cable
– high computing power
transfer rate of 1 Gbps (for synchronization)
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Data work-memory: max. 8 MB
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Code work-memory: max. 2 MB
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Each CPU has two optical interfaces.
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Synchronization of the CPUs runs separately
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from the PROFINET ring over fiber-optic ca-
bles.
The full bandwidth of the PROFINET cable is
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available for PROFINET IO communication.
Distance between the two H CPUs:
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– Maximum of 10 km (depends on the syn-
chronization modules used)
In the PROFINET ring: Max. 50 PROFINET
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devices (including H-CPUs)
In the PROFINET ring and separated with
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switches (line): Max. 258 PROFINET devices
(including H-CPUs)
System overview
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