Preface - Siemens Simatic series Manual

Preface

Purpose of the documentation
This manual supplements the S7-1500/ET 200MP
(https://support.industry.siemens.com/cs/ww/en/view/59191792) system manual.
Functions that relate in general to the systems are described in this system manual.
The information provided in this manual and in the system/function manuals supports you in
commissioning the systems.
Changes compared to previous version
Compared to the previous version, this manual contains the following changes:
● Clock synchronization possible in counting mode. In the technical specifications the
counting frequency increased from 1 kHz to 3 kHz.
● New licensing conditions and copyright information of the Open Source Software
● New technical specifications
Conventions
CPU: The term "CPU" is used in this manual both for the CPUs of the S7-1500 automation
system and for interface modules of the ET 200MP distributed I/O system.
STEP 7: In this documentation, "STEP 7" is used as a synonym for all versions of the
configuration and programming software "STEP 7 (TIA Portal)".
DI mode: DI 16x24VDC HF as digital input module with 16 digital inputs (channels 0 to 15).
Counting mode: DI 16x24VDC HF as digital input module with 2 counters (channels 0 and 1)
and 14 digital inputs (channels 2 to 15).
Please also observe notes marked as follows:
Note
A note contains important information on the product described in the documentation, on the
handling of the product or on the section of the documentation to which particular attention
should be paid.
DI 16x24VDC HF Digital Input Module (6ES7521-1BH00-0AB0)
Manual, 08/2018, A5E03485952-AG
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