CPU 31xC and CPU 31x,
Guide to the S7-300
Operating and display
Cycle and reaction times
Technical data of CPU 31xC
Technical data of CPU 31x
This manual is part of the documentation package
with the order number: 6ES7398-8FA10-8BA0
This manual contains notices which you should observe to ensure your own personal safety as well as to avoid
property damage. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring to property damage only have no safety alert symbol.
indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
used with the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury.
used without safety alert symbol indicates a potentially hazardous situation which, if not avoided, may
result in property damage.
used without the safety alert symbol indicates a potential situation which, if not avoided, may result in
an undesirable result or state.
When several danger levels apply, the notices of the highest level (lower number) are always displayed. If a
notice refers to personal damages with the safety alert symbol, then another notice may be added warning of
The device/system may only be set up and operated in conjunction with this documentation. Only qualified
personnel should be allowed to install and work on the equipment. Qualified persons are defined as persons who
are authorized to commission, to earth, and to tag circuits, equipment and systems in accordance with
established safety practices and standards.
Please note the following:
This device and its components may only be used for the applications described in the catalog or
technical description, and only in connection with devices or components from other manufacturers
approved or recommended by Siemens.
This product can only function correctly and safely if it is transported, stored, set up and installed
correctly, and operated and maintained as recommended.
All designations marked with ® are registered trademarks of Siemens AG. Other designations in this
documentation might be trademarks which, if used by third parties for their purposes, might infringe upon the
rights of the proprietors.
Copyright Siemens AG ,2004.All rights reserved
Reproduction, transmission or use of this document or its contents is not permitted without
express written authority. Offenders will be liable for damages. All rights, including rights
created by patent grant or registration of a utility model or design, are reserved.
Automation and Drives Group
P.O. Box 4848, D-90327 Nuremberg (Germany)
Disclaimer of Liability
We have checked the contents of this manual for agreement with the hardware and
software described. Since deviations cannot be precluded entirely, we cannot guarantee
full agreement. However, the data in the manual are reviewed regularly, and any
necessary corrections will be included in subsequent editions. Suggestions for
improvement are welcomed.
Siemens AG 2004
Technical data subject to change
Order No. A5E00105475-05
www.DataSheetP4Uu.rcpomose of the Manual
This manual contains all the information you will need concerning the configuration,
communication, memory concept, cycle, response times and technical data for the CPUs.
You will then learn the points to consider when upgrading to one of the CPUs discussed in
Required basic knowledge
• To understand this manual, you require a general knowledge of automation engineering.
• You should also be accustomed to working with STEP 7 basic software.
Area of application
Table 1-1 Application area covered by this manual
CPU 313C-2 PtP
CPU 313C-2 DP
CPU 314C-2 PtP
CPU 314C-2 DP
CPU 315-2 DP
CPU 315-2 PN/DP
CPU 317-2 DP
CPU 317-2 PN/DP
as of version
The special features of the CPU 315F-2 DP (6ES7 315-6FF00-0AB0) and CPU 317F-2 DP
(6ES7 317-6FF00-0AB0) are described in their Product Information, available on the Internet
http://www.siemens.com/automation/service&support, article ID 17015818.
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
There you can obtain the descriptions of all current modules. For new modules, or modules
of a more recent version, we reserve the right to include a Product Information containing
C tick mark
The SIMATIC S7-300 product series has the following approvals:
• Underwriters Laboratories, Inc.: UL 508 (Industrial Control Equipment)
• Canadian Standards Association: CSA C22.2 No. 142, (Process Control Equipment)
• Factory Mutual Research: Approval Standard Class Number 3611
The SIMATIC S7-300 product series satisfies the requirements and safety specifications of
• EC Directive 73/23/EEC "Low-voltage directive"
• EC Directive 89/336/EEC "EMC directive"
The SIMATIC S7-300 product series is compliant with AS/NZS 2064 (Australia).
The SIMATIC S7-300 product series is compliant with IEC 61131-2.
CPU 31xC and CPU 31x, Technical data
iv Manual, Edition 08/2004, A5E00105475-05
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