Siemens Simatic S7-1500R System Manual page 90

PROFINET devices suitable for the redundant system
The table below shows the maximum number of PROFINET devices in the redundant
system. The maximum number includes switches, S7-1500R/H CPUs, S7-1500 CPUs (V2.5
or later) and HMI devices. It does not include media converters.
Table 3- 6
PROFINET devices
In the PROFINET ring
In the PROFINET ring and separated with switches
(line)
Recommendation: The number of devices in the PROFINET ring affects the availability of the S7-
1)
1500R system. You should therefore operate no more than 16 PROFINET devices (including R-
CPUs) in the PROFINET ring. If you operate significantly more devices in the PROFINET ring, the
availability of the IO devices and R-CPUs is reduced.
The technical specifications in the documentation are based on the recommended maximum of 16
PROFINET devices in the ring in S7-1500R.
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
Number of PROFINET devices in the redundant system
3.6 Hardware configuration
Maximum number, S7- Maximum number,
1500R S7-1500H
50 (Recommendation 50
16)
1)
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Application planning
89