Siemens CPU 312C User Manual

CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06
ix
Table of contents
Preface. .....................................................................................................................................................iii
1 Guide to the S7-300 documentation ....................................................................................................... 1-1
2 Operating and display elements ............................................................................................................. 2-1
2.1 Operating and display elements: CPU 31xC ............................................................................. 2-1
2.1.1 Operating and display elements: CPU 31xC ............................................................................. 2-1
2.1.2 Status and Error Indicators: CPU 31xC ..................................................................................... 2-4
2.2 Operating and display elements: CPU 31x................................................................................ 2-5
2.2.1 Operating and display elements: CPU 312, 314, 315-2 DP: ..................................................... 2-5
2.2.2 Operating and display elements: CPU 317-2 DP ...................................................................... 2-7
2.2.3 Operating and display elements: CPU 31x-2 PN/DP ................................................................ 2-9
2.2.4 Operating and display elements: CPU 319-3 PN/DP .............................................................. 2-11
2.2.5 Status and error displays of CPU 31x...................................................................................... 2-13
3 Communication....................................................................................................................................... 3-1
3.1 Interfaces ................................................................................................................................... 3-1
3.1.1 Multi-Point Interface (MPI) ......................................................................................................... 3-1
3.1.2 PROFIBUS DP........................................................................................................................... 3-2
3.1.3 PROFINET (PN)......................................................................................................................... 3-3
3.1.4 Point to Point (PtP) .................................................................................................................... 3-5
3.2 Communication services............................................................................................................ 3-6
3.2.1 Overview of communication services ........................................................................................ 3-6
3.2.2 PG communication..................................................................................................................... 3-7
3.2.3 OP communication..................................................................................................................... 3-8
3.2.4 Data exchanged by means of S7 basic communication............................................................ 3-8
3.2.5 S7 communication ..................................................................................................................... 3-8
3.2.6 Global data communication (MPI only)...................................................................................... 3-9
3.2.7 Routing..................................................................................................................................... 3-11
3.2.8 Point-to-point connection ......................................................................................................... 3-15
3.2.9 Data consistency...................................................................................................................... 3-15
3.2.10 Communication by means of PROFINET ................................................................................ 3-16
3.2.10.1 PROFINET IO System ............................................................................................................. 3-19
3.2.10.2 Blocks in PROFINET IO........................................................................................................... 3-20
3.2.10.3 System status lists (SSLs) in PROFINET IO ........................................................................... 3-22
3.2.10.4 Open communication via Industrial Ethernet........................................................................... 3-24
3.2.10.5 SNMP communication service................................................................................................. 3-27
3.3 S7 connections ........................................................................................................................ 3-27
3.3.1 S7 connection as communication path .................................................................................... 3-27
3.3.2 Assignment of S7 connections................................................................................................. 3-28
3.3.3 Distribution and availability of S7 connection resources ......................................................... 3-30
3.3.4 Connection resources for routing............................................................................................. 3-32
3.4 DPV1........................................................................................................................................ 3-33

Siemens CPU 312C Specifications

General

Brand	Siemens
Model	CPU 312C
Category	Processor
Language	English