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

To Next Page

To Previous Page

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