Siemens SIMATIC NET CP 243-1 User Manual

Configuration 09/02
CP 243-1
36 J31069-D0428-U001-A1-7618
4.4 Configuring a CP 243-1 from a user program
The configuration data of the CP 243-1 are stored in the S7-200 CPU memory and
can therefore be changed directly from an S7-200 user program. The cyclic redun-
dancy check (CRC) must be disabled for the configuration data so that the
CP 243-1 will accept configuration data which were changed in this way during the
next startup. For this purpose, the value 16#AC must be entered for Byte 13 of the
CDB data structure. This takes place automatically as soon as the CRC mecha-
nism is switched off in the Ethernet Wizard.
Attention
Configuring the CP 243-1 from a user program is only recommended for experi-
enced programmers.
The CP 243-1 cannot completely check the configuration data for consistency with
regard to intentional and unintentional changes after the CRC check has been
switched off. Therefore, in this case there is no guarantee whatsoever that the CP
or the components connected in the network will function correctly.
Note
Data of the “WORD“ (2 bytes) or "DWORD“ (4 bytes) type are stored in an S7-200
in "big endian“ format, i.e.
Address n: MSB
Address n+1: LSB (analogous for DWORD).

Siemens SIMATIC NET CP 243-1 Specifications

General

Product type designation	CP 243-1
Series	SIMATIC NET
Transmission rate	10/100 Mbit/s
Number of connections	8
Power Supply	24 V DC
Mounting type	DIN rail
Weight	Approx. 200 g
Product Type	Communications processor
Compatible With	S7-200
Interface	Ethernet
Protocols	TCP/IP
Operating Temperature	0 to 60 °C

Summary

Preface

Purpose of this manual

Explains the manual's objective in supporting CP 243-1 usage.

Prerequisites

Outlines necessary knowledge for understanding the CP 243-1.

Target group

Identifies the intended audience for this manual.

Sample program

Mentions the availability of a sample program for programming assistance.

Notes on product

Address label: MAC address

Details the MAC address location and its fixed nature.

MLFB number, scope of delivery

Lists product name, MLFB number, and delivery contents.

Introduction

Definition and application

Defines the CP 243-1 and its role in automation systems.

Continuous communication in the industry sector

Positions Industrial Ethernet within the SIMATIC NET concept.

Compatibility

Specifies compatible S7-200 CPUs and extension module limits.

Features and functions

Overview

Lists key functionalities of the CP 243-1.

S7 communication via Industrial Ethernet

Explains S7 communication over Industrial Ethernet, including data transfer.

Types of communication

Describes three types of communication relationships supported by the CP 243-1.

Communication partners

Lists various communication partners and system requirements.

Installation and commissioning

Installation

Discusses general installation guidelines for S7-200 modules.

Wiring

Provides guidelines and warnings for wiring the CP 243-1.

General guidelines

Offers general principles for wiring automation systems.

Electrical requirements

Specifies the input voltage and isolation requirements for the CP 243-1.

Space requirements for installation

Details spatial considerations for heat dissipation and module placement.

Dimensions for installation in a control panel

Provides physical dimensions for panel mounting.

Dimensions for installation on a DIN rail

Shows dimensions for mounting on a standard DIN rail.

Installation in a control panel

Outlines the step-by-step procedure for panel installation.

Installation on a standard DIN rail

Details the procedure for mounting on a DIN rail.

Replacement of the CP 243-1

Explains that reprogramming is not needed for replacement.

Removing the CP 243-1

Provides steps and warnings for removing the module.

Configuration

Configuration options

Describes methods for configuring communication via CP 243-1.

IP address

Specifies conventions for valid IP address formats.

Subnet mask

Outlines requirements for subnet mask validity.

TSAPs

Defines the format and value ranges for TSAP parameters.

Configuring a CP 243-1 using STEP 7 Micro/WIN 32

Guides through the configuration process using the Ethernet Wizard.

Defining the address of the control byte and the number of connections

Specifies memory addresses and maximum parallel connections.

Configuring the individual connections

Details configuration steps for client/server connections.

Enabling / disabling the CRC mechanism and defining the Keep Alive time

Explains CRC protection and Keep Alive timer settings.

Defining the memory area for storing the configuration

Guides on selecting the memory area for configuration data.

Configuring a CP 243-1 from a user program

Describes direct configuration via an S7-200 user program.

Occupied system flag area (SM area)

Details the SM area occupied by CP 243-1 and its structure.

Structure of the Configuration Data Blocks (CDB)

Shows the structure of the Configuration Data Blocks (CDB).

Structure of the Network Parameter Blocks (NPB)

Details the structure of the Network Parameter Blocks (NPB).

Structure of the Network Data Blocks (NDB)

Explains the structure of the Network Data Blocks (NDB).

Configuring a communication partner with STEP 7

Outlines steps for configuring partners using STEP 7.

Configured connections

Explains how to insert and configure S7 connections in NetPro.

S7-300 system as client

Describes configuring an S7-300 as a client, including TSAP transformation.

Free connections

Discusses the use of free connections for S7-300/S7-400 servers.

Programming

Use STEP 7 Micro/WIN 32 to develop S7-200 user programs

Introduces using STEP 7 Micro/WIN 32 for S7-200 programming with CP 243-1.

ETHx_CTRL

Describes the ETHx_CTRL subroutine for initialization and monitoring.

ETHx_CFG

Explains the ETHx_CFG subroutine for reading configuration data.

ETHx_XFR

Details the ETHx_XFR subroutine for data transfer.

Diagnostics

Diagnostics options

Lists available diagnostic tools and methods.

Error messages of the CP 243-1

Presents key error messages and their reporting mechanisms.

Appendix A Technical data

Appendix B Example

Program code

Provides an example program for CP 243-1 client operation.

Appendix C Timeouts

Abbreviations

SIMATIC NET – Support and training

Automation and Drives, Service & Support

Information on reaching Siemens Service & Support globally.

Online technical support services

Details on accessing online information and FAQs.

Training center

Information about training courses and contact details.

Additional support

Information on finding further support resources.