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Entry type: Product note Entry ID: 48300362, Entry date: 02/14/2011

New S7-300 Compact CPU 314C-2 PN/DP Released for Delivery

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The new SIMATIC S7-300 compact CPU 314C-2 PN/DP with firmware V3.3 has been released for delivery.

Product information

Basic data:

CPU Name  CPU 314C-2 PN/DP
Firmware  V3.3
Memory  192 KByte
Retentive memory for retentive data blocks, max.  64 KByte
Processing times
   for bit operations, min.  0.06 µs
   for word operations, min.  0.12 µs
   for fixed-point arithmetic, min.  0.16 µs
   for floating-point arithmetic, min.  0.59 µs
Process I/O image
   adjustable max.  2048/2048
   default  128/128
Integral I/Os
   DI / DO  24 / 16
   AI / AO  5/ 2
Integral technology functions
   Counters  4 channels
   Frequency measurement  4 channels up to 60 kHz
   Length of period measurement  4 channels
   Pulse output  4 channels pulse width modulation up to 2.5 kHz
   Open loop positioning  1 channel
   Integral SFB "Closed Loop"  PID controller
   X1  MPI/DP
   X2  PN (2 ports)
CPU Dimensions WxHxD (mm)  120 x 125 x 130

Features of the CPU 314C-2 PN/DP

The CPU 314C-2 PN/DP is the newest member of the compact CPUs from the S7-300 product family. The CPU has the following features:

  • For use as central or distributed controller on PROFIBUS or PROFINET
  • High processing speed in binary operations and floating-point arithmetic
  • 192 kB work memory / of which 64 kB are retentive
  • Combined MPI/DP interface for DP master or DP slave
    • as DP-Master: 124 DP slaves are permitted
  • Integral PROFINET interface with 2-port switch for line structures
  • As PROFINET IO controller the CPU 314C-2 PN/DP also supports:
    • 128 IO Devices
    • Realtime communication via RT and IRT
    • Fast startup of PROFINET IO devices
    • Device replacement without replacement medium or PG
    • Changing IO devices during operations (changing Partner Ports)
    • Isochronous mode on PROFINET
    • Shared Device
  • If run as PROFINET I Device the CPU can exchange data with a higher level ontroller and thus be used as intelligent pre-processing unit of process sections, for instance:
    • A CPU used as I Device can function simultaneously as IO Controller and in this way create its own lower level PROFINET IO sub network
    • A CPU used as I Device can also work as Shared I Device
  • Componet Based Automation (CBA) on PROFINET
  • PROFINET Proxy for intelligent devices on PROFIBUS DP in CBA
  • The integrated web server for user-defined websites, information, status and
    diagnosis will deliver the corresponding data to any desired place
  • Open Ethernet communication (TCP/IP, UDP, Iso-on-TCP) with 8 connections
  • Data record routing
  • Integral technology functions (see table)
  • Integral inputs / outputs (see table)

The performance of the new CPU 314C-2 PN/DP is the same as that of the modular CPU 314 V3. Compared to the existing compact CPUs 314C-2 DP V2.x and 314C-2 PtP V2.x the user programs on the new CPUs are processed up to 5 times faster, in some cases even better.

Compatibility and necessary components

The CPU 314C-2 PN/DP is fully program compatible with the new generation S7-300 CPUs (FW version V2.0 and higher, with SIMATIC Micro Memory Card and w/o backup battery).
It also supports the full spectrum of S7-300 modules.


Product Name Order No. FW STEP7 & HSP File
CPU 314C-2 PN/DP 6ES7314-6EH04-0AB0 V3.3 STEP 7 V5.5 and higher with HSP 191

Configuration of the new CPU with older STEP 7 versions than V5.5 is not possible.

SIMATIC Micro Memory Card (required for operation of the CPU)
The following types can be used:

Product Name Order No.
SIMATIC Micro Memory Card, 64 kB 6ES7953-8LF20-0AA0
SIMATIC Micro Memory Card, 128 kB 6ES7953-8LG20-0AA0
SIMATIC Micro Memory Card, 512 kB 6ES7953-8LJ20-0AA0
SIMATIC Micro Memory Card, 2 MB 6ES7953-8LL20-0AA0
SIMATIC Micro Memory Card, 4 MB 6ES7953-8LM20-0AA0
SIMATIC Micro Memory Card, 8 MB 6ES7953-8LP20-0AA0

Further information

The following information material is available for sales support:

Internet www.siemens.de/SIMATIC-S7-300
PROFINET Internet http://www.automation.siemens.com/..

User manuals:

Order No. Product Description Entry ID


S7-300, Product Information CPU 314C-2 PN/DP, 48214199
S7-300, CPU 31xC and CPU 31x: Assembly Instructions, 13008499
CPU 31xC and CPU 31x, Technical Data Manual, 12996906
S7-300, Module Data Reference Manual, 8859629
S7-300, CPU 31xC Technological Functions 12429336
S7-300 Getting Started Collection, 15390497
PROFINET IO Getting Started Collection, 19290251
Operations List S7-300,
CPU 312, CPU 314, CPU 315-2 DP, CPU 315-2 PN/DP, CPU 317-2 PN/DP, CPU 319-3 PN/DP, IM151-8 PN/DP CPU, IM 154-8 PN/DP CPU for firmware >= V3.0,
PROFINET System Description 19292127
6ES7998-8XC01-8YE0 SIMATIC Manual Collection CD, 5 languages  
6ES7998-8XC01-8YE2 SIMATIC Manual Collection CD, 5 languages, Update Service for 1 year  

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