Programmed Communication Connections

5.1Overview

Area of Application

Communication connections can be freely configured controlled by the program.

Interplay between Programming and Configuration

Connections are either configured using STEP 7 or configured by the user program while the S7 station is running. Mixing these variants on a CP is not possible!

Principle

Configuration data for communication connections can be transferred to the CPU using the function block called in the user program.

FB55 CP_CONFIG

Configuration data block

 

System data for CP

 

Connection 1

Configuration data

 

Connection 2

transferred to the CP

 

Connection n *)

*) nmax = 64

The configuration DB can be loaded on the CP at any time. The previously valid connections are then overwritten.

Based on the configuration data, the Ethernet CP recognizes that the communication connections must be set up by the user program.

As soon as the user program transfers the connection data via FB55 IP_CONFIG, the CPU switches the CP briefly to STOP. The CP receives the system data (including the IP address) and the new connection data and processes them during startup (RUN).

Configuration Limits

A maximum of 64 connections can be specified in FB55 CP_CONFIG. The most important factor, however, is the maximum number of connections supported by the CP type you are using (see /1/).

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SIMATIC NET NCM S7 for Industrial Ethernet

Release 6/2003

C79000–G8976–C129–07

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Siemens NCM S7 Overview, Area of Application, Interplay between Programming and Configuration, Configuration Limits

NCM S7 specifications

Siemens NCM S7, which stands for Siemens Network Control Module for the S7 series, represents a significant advancement in industrial automation technology. This robust control system is designed to enhance productivity and efficiency in various manufacturing processes. Its primary purpose is to facilitate seamless communication between field devices and higher-level control systems, ensuring that processes run smoothly and effectively.

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