Communication Services - Siemens S7-400 Equipment Manual

• PROFINET IO
– IRT with the option "high performance"
– Full PROFINET IO diagnostics on the gigabit interface
– Full PROFINET IO diagnostics on all interfaces also in the expansion rack
• Use in fault-tolerant systems (H systems) is also possible on the gigabit interface.
Expansions on the interface to the user program
• New program block AG_CNTEX for connection and system diagnostics with PING
functionality
• Expanded program block FTP_CMD for FTP services allows the establishment of secure SSL
connections.
Functional improvements
The overall communication speed of the CP during simultaneous operation of standard
communications functions and PROFINET IO controller mode was further improved.
1.3

Communication services

The CP supports the following communication services:
• PROFINET IO controller
PROFINET IO allows direct access to PROFINET IO devices over Industrial Ethernet.
PROFINET IO can only be used via the ports of the PROFINET interface.
– Prioritized startup
– IRT communication (Isochronous Real Time) with IRT option "high performance"
– Shared device
CP 443-1 Advanced
Equipment Manual, 03/2023, C79000-G8976-C256-07
The CP supports prioritized startup. Per PROFINET IO controller, a maximum of 32
PROFINET IO devices can be configured that support prioritized startup. Of these 32 IO
devices, simultaneous startup times with values as low as 0.5 s can be achieved by up
to 8 IO devices.
IRT communication with the IRT option "high-performance" is possible with PROFINET
IO. The IRT option "high-performance" optimizes data traffic as the result of topology
planning.
Note: IRT with the option "high flexibility" is now only supported when a CP GX20 is
replaced.
Note
IRT communication or MRP
If you are using IRT communication, no media redundancy is supported.
As a PROFINET IO controller, individual submodules of an IO device can be assigned to
the CP. Read the information in /16/ (Page 106) regarding configuration of PROFINET
IO systems and shared IO devices.
Properties and services
1.3 Communication services
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