Siemens SIMATIC ET 200AL, System Manual

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Functions
5.7 Isochronous mode
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
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5.7.4.2 Configuring isochronous mode on PROFINET IO
Introduction
The configuring of isochronous mode for a module is described as IO device in the following
based on the ET 200MP distributed I/O system. The procedure described also applies to other
distributed I/O systems (e.g., ET 200S or ET 200SP).
The IO controller is an S7-1500 CPU.
Requirements
• The STEP 7 network view is open.
• A S7-1500 CPU has been placed (e.g., CPU 1516-3 PN/DP).
• An IM 155-5 PN HF interface module (ET 200MP) has been placed and networked with the
CPU via PROFINET IO.
• All requirements for an IRT configuration are met:
– The ports of the networked PROFINET interfaces of the CPU and interface module are
interconnected (topology configuration).
– The RT class of the PROFINET interface of the interface module is set to "IRT" (area
"Advanced options > Real time settings > Synchronization").
– The "sync master" and "sync slave" roles are assigned for the PROFINET interfaces of the
CPU and interface module (in the properties of a PROFINET interface: area "Advanced
options" > "Media redundancy" > "Domain settings").