Siemens SIMATIC S7-300 CPU Data: CPU 315-T-2 DP User Manual

Table of contents
1 Preface ................................................................................................................................................... 1-1
2 Product Overview ................................................................................................................................... 2-1
3 Operator controls and indicators............................................................................................................. 3-1
4 Setting up an S7-300 with a Technology CPU........................................................................................ 4-1
4.1 Overview .................................................................................................................................... 4-1
4.2 S7-300 components................................................................................................................... 4-1
4.3 Configuring................................................................................................................................. 4-2
4.4 Subnets...................................................................................................................................... 4-2
4.4.1 Expanding and Networking Subnets.......................................................................................... 4-2
4.4.2 Interfaces ................................................................................................................................... 4-3
4.5 Addressing ................................................................................................................................. 4-4
4.6 Commissioning........................................................................................................................... 4-5
4.7 Operating system....................................................................................................................... 4-6
4.8 Status and error displays of the Technology CPU..................................................................... 4-6
5 Communication with the S7-300............................................................................................................. 5-1
5.1 Interfaces ................................................................................................................................... 5-1
5.1.1 Overview .................................................................................................................................... 5-1
5.1.2 MPI/DP interface (X1) ................................................................................................................ 5-1
5.1.3 PROFIBUS DP(DRIVE) interface (X3) ...................................................................................... 5-3
5.2 DPV1 (X1 only as PROFIBUS DP interface)............................................................................. 5-4
5.3 Communication services on the MPI/DP interface (X1)............................................................. 5-6
5.3.1 Overview of communication services ........................................................................................ 5-6
5.3.2 PG communication..................................................................................................................... 5-7
5.3.3 OP communication..................................................................................................................... 5-7
5.3.4 S7 basic communication ............................................................................................................ 5-8
5.3.5 S7 communication ..................................................................................................................... 5-8
5.3.6 Global data communication ....................................................................................................... 5-9
5.3.7 Routing..................................................................................................................................... 5-10
5.3.8 Data consistency...................................................................................................................... 5-13
5.4 S7 communication structure .................................................................................................... 5-13
5.4.1 Communication path of an S7 connection ............................................................................... 5-13
5.4.2 Assignment of S7 connections................................................................................................. 5-14
5.4.3 Distribution and availability of S7 connection resources ......................................................... 5-16
6 Memory concept ..................................................................................................................................... 6-1
6.1 Memory areas and retentive address areas .............................................................................. 6-1
6.1.1 Technology CPU memory areas................................................................................................ 6-1
6.1.2 Retentive address areas of the load memory, system memory and technology system data .. 6-2
6.1.3 Retentive behavior of the memory objects ................................................................................ 6-3
S7-300 CPU Data: CPU 315T-2 DP
Manual, 12/2005, A5E00427933-02
iii

Siemens SIMATIC S7-300 CPU Data: CPU 315-T-2 DP Specifications

General

Brand	Siemens
Model	SIMATIC S7-300 CPU Data: CPU 315-T-2 DP
Category	Control Unit
Language	English