Configuring Isochronous Mode - Siemens SIMATIC ET 200AL System Manual

5.7.8

Configuring isochronous mode

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 interface module IM 155-5 PN HF (ET 200MP) has been placed and networked with
the CPU.
● All requirements for an IRT configuration are met, namely:
– The ports of the CPU and the interface module are interconnected.
– The RT class of the interface module is set to "IRT" (area "Advanced options > Real
– You have assigned the "sync master" and "sync slave" roles.
Procedure
To create an isochronous connection between the I/O and user program, follow these steps:
1. Select the "IM 155-5 PN HF" in the network view of STEP 7 and switch to the device
view.
2. Insert an IO module that can be operated in isochronous mode (module with the
extension "HF").
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH
time settings > Synchronization").
Functions
5.7 Isochronous mode
205