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  • CPU 31xC and CPU 31x: Technical specifications
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    Entry type: Manual, Entry ID: 12996906, Entry date: 04/07/2011

    SIMATIC S7-300 CPU 31xC and CPU 31x: Technical specifications

    Document: CPU 31xC and CPU 31x: Technical specifications (03/2011, English)
    Type of topic: Area

    Preface

    Purpose of this manual

    This manual contains essential information about the following:

    • Installation
    • Communication
    • Memory concept
    • Cycle and response times
    • Technical specifications of the CPUs.

    Basic knowledge required

    • In order to understand this manual, you require a general knowledge of automation engineering.
    • You require knowledge of STEP 7 basic software.

    Scope

    The name CPU 31xC summarizes all compact CPUs, as table below shows:

    CPU

    Convention:
    CPU designations:

    Order number

    As of firmware version

    CPU 312C

    CPU 31xC

    6ES7312-5BF04-0AB0

    V3.3

    CPU 313C

    6ES7313-5BG04-0AB0

    V3.3

    CPU 313C-2 PtP

    6ES7313-6BG04-0AB0

    V3.3

    CPU 313C-2 DP

    6ES7313-6CG04-0AB0

    V3.3

    CPU 314C-2 PtP

    6ES7314-6BH04-0AB0

    V3.3

    CPU 314C-2 DP

    6ES7314-6CH04-0AB0

    V3.3

    CPU 314C-2 PN/DP

    6ES7314-6EH04-0AB0

    V3.3


    The name CPU 31x summarizes all standard CPUs, as table below shows:

    CPU

    Convention:
    CPU designations:

    Order number

    As of firmware version

    CPU 312

    CPU 31x

    6ES7312-1AE14-0AB0

    V3.3

    CPU 314

    6ES7314-1AG14-0AB0

    V3.3

    CPU 315-2 DP

    6ES7315-2AH14-0AB0

    V3.3

    CPU 315-2 PN/DP

    6ES7315-2EH14-0AB0

    V3.2

    CPU 317-2 DP

    6ES7317-2AK14-0AB0

    V3.3

    CPU 317-2 PN/DP

    6ES7317-2EK14-0AB0

    V3.2

    CPU 319-3 PN/DP

    6ES7318-3EL01-0AB0

    V3.2


    All CPUs with PROFINET properties are grouped under the designation CPU 31x PN/DP, as the following table shows:

    CPU

    Convention:
    CPU designations:

    Order number

    As of firmware version

    CPU 314C-2 PN/DP

    CPU 31x PN/DP

    6ES7314-6EH04-0AB0

    V3.3

    CPU 315-2 PN/DP

    6ES7315-2EH14-0AB0

    V3.2

    CPU 317-2 PN/DP

    6ES7317-2EK14-0AB0

    V3.2

    CPU 319-3 PN/DP

    6ES7318-3EL01-0AB0

    V3.2



    Note

    A description of the special features of the failsafe CPUs of the S7 product range is available in the product information at the following Internet address.




    Note

    We reserve the right to include a product Information containing the latest information on new modules or modules of a more recent version.



    Changes in comparison to the previous version

    The following table contains changes from the previous versions of the following documentation from the S7-300 documentation package:

    • Technical specifications manual, version 06/2010
    • Operating instructions for installation, version 06/2010

    The CPU‑ 314C-2 PN/DP has been added in delivery stage V3.3. It has the same functionalities as the CPU 314C-2 DP and also has PROFINET functionalities such as those of the CPU 315-2 PN/DP.

    In delivery stage V3.3, the functionality and performance of all C-CPUs and the CPU 317-2 DP were improved compared to their predecessor versions.

    Additional information was taken from the chapter "Information on converting to a CPU 31xC or CPU 31x". If you required more information, however, please refer to the FAQs on the Internet.

    CPU

    312

    312C

    313C

    313C-2 DP

    313C-2 PtP

    314

    314C-2 DP

    314C-2 PtP

    315-2 DP

    317-2 DP

    Encryption of blocks using S7-Block Privacy

    X

    X

    X

    X

    X

    X

    X

    X

    X

    X

    Integration of a maintenance LED

    X1, 2

    X 2

    X 2

    X 2

    X 2

    X1, 2

    X 2

    X 2

    X1, 2

    X 2

    Configurable increase of control and monitoring performance

    -

    -

    -

    -

    -

    -

    -

    -

    X

    X

    Improved operational limits for PT100 Analog input

    -

    -

    X

    -

    -

    -

    X

    X

    -

    -

    Data set routing

    -

    -

    -

    X

    -

    -

    X

    -

    X 1

    X

    Configurable process image

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Expansion of the block number range

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Number of displayed diagnostic buffer entries can be configured in CPU RUN mode

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Reading out the service data

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Extension of SFC 12 with 2 new modes to trigger the OB 86 during enabling/disabling

    -

    -

    -

    X

    -

    -

    X

    -

    X 1

    X

    Copying of 512 bytes with SFC 81

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Increase

    Main memory

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Performance through shorter command processing times

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Status information that can be monitored by the status block, in STEP 7 V5.5 or higher

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Number of blocks that can be monitored by the status block
    (from 1 to 2)

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Number of breakpoints from 2 to 4

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Local data stack

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Number of block-related messages (Alarm_S) is uniformly limited to 300

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X

    Number of the bit memories, timers and counters

    X 1

    X

    -

    -

    -

    -

    -

    -

    -

    -

    Standardization

    DB sizes: Max. 64 KB

    X1, 3

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X 1

    Watchdog interrupts:

    OB 32 to OB 35

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X 1

    Global data communication of 8 GD circles

    X 1

    X

    X

    X

    X

    X 1

    X

    X

    X 1

    X 1

    System function blocks for integrated technology functions:

    SFB 41 to 43

    -

    -

    X 1

    X 1

    X 1

    -

    X 1

    X 1

    -

    -

    SFB 44 and 46

    -

    -

    -

    -

    -

    -

    X 1

    X 1

    -

    -

    SFB 47 to 49

    -

    X 1

    X 1

    X 1

    X 1

    -

    X 1

    X 1

    -

    -

    SFB 60 to 62

    -

    -

    -

    -

    X 1

    -

    -

    X 1

    -

    -

    SFB 63 to 65

    -

    -

    -

    -

    -

    -

    -

    X 1

    -

    -

    1 This function was already made available to the CPU in an earlier version

    2 Available, but without function

    3 Max. DB size 32 KB


    Standards and certifications

    For information about standards and approvals, see the section "General technical specifications".

    Recycling and disposal

    Because they have ecologically compatible components, the devices described in this manual can be recycled. For environment-friendly recycling and disposal of your old equipment, contact a certified disposal facility for electronic scrap.

    Service & Support on the Internet

    In addition to our documentation, we offer a comprehensive knowledge base online on the Internet.

    There you will find:

    • Our newsletter containing up-to-date information on your products
    • The latest documents in the Siemens Service & Support search engine.
    • A forum for global information exchange by users and specialists.
    • Your local representative for automation and drives in our contact database
    • Information about on-site services, repairs, spare parts, and lots more.
    • Applications and tools for the optimized use of the SIMATIC S7. For example, Siemens also publishes DP and PN performance measurements on the Internet.


     

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