PROFINET with STEP 7
292
Function Manual, 05/2021, A5E03444486-AL
PROFINET with the redundant S7-1500R/H system
6
Introduction
The same basic rules apply to PROFINET IO communication with the redundant S7-1500R/H as
with the S7-1500 automation system. The redundant S7-1500R/H system exchanges IO data
cyclically with the IO devices.
The redundant S7-1500R/H system supports a limited scope of PROFINET functions.
The redundant S7-1500R/H system uses media redundancy (MRP) in the PROFINET ring.
You can use the following IO devices on the redundant S7-1500R/H system:
•
IO devices with S2 system redundancy
•
Standard IO devices over the "Switched S1 device" function of the CPU
When configuring PROFINET with the redundant S7-1500R/H system, you must observe a few
specifics, e.g. special configuration requirements.
Limitations
•
Real-time communication:
–
RT with a fixed send clock of 1 ms
–
No IRT
–
No MRPD redundancy procedure
–
No PROFINET with performance upgrade
•
No isochronous mode
•
No direct data exchange
•
No operation as I-device
•
No access to shared devices
•
No support of docking systems
•
No support of series machine projects
•
Port options (only for PROFINET interface X1):
–
No port disabling possible
–
No configuring of boundaries possible
•
Functionality as IO controller:
–
No prioritized startup
–
No enabling/disabling of IO devices
–
No support of series machine projects, e.g. IO systems that can be used multiple times
•
PROFINET interface X2 does not support IO functionality (CPU 1515R/CPU 1517H)
•
No diagnostics using the web server
•
No IP address assignment by the DHCP server
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