Product overview
2.2 Functions
IM 155-5 PN HF Interface Module (6ES7155-5AA00-0AC0)
Manual, 10/2018, A5E32840985-AB
19
Isochronous mode of process data
The process data, transmission cycles via PROFINET IO, and the user program are
synchronized to achieve maximum deterministics. The input data and output data of
distributed I/O devices in the plant are detected and output simultaneously. The isochronous
PROFINET IO cycle forms the clock generator for this.
You can find additional information in the STEP 7 online help and
● As of STEP 7 V12, in the PROFINET with STEP 7
(http://support.automation.siemens.com/WW/view/en/49948856) function manual
An IO device with S2 system redundancy supports redundant ARs.
In a redundant system, an IO device with system redundancy S2 has a redundant AR for
each of the two CPUs (IO controllers). If one CPU fails, the IO device with S2 system
redundancy remains accessible to the remaining IO controller via the AR.
The interface module supports system redundancy S2 on S7-400H CPUs and on S7-
1500R/H CPUs.
You can find additional information in the STEP 7 online help and
● As of STEP 7 V12, in the PROFINET with STEP 7
(http://support.automation.siemens.com/WW/view/en/49948856) function manual
IO devices changing during operation ("alternative partners") - docking station
You can use the PROFINET functionality "IO devices changing during operation"
("alternative partners"), e.g. for tool change for robots. Typical tools include:
● Welding guns
● Positioning tools for manufacturing parts
You can find additional information in the STEP 7 online help and
● As of STEP 7 V12, in the PROFINET with STEP 7
(http://support.automation.siemens.com/WW/view/en/49948856) function manual
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