Siemens Simatic S7-1500 Communication Instruction Manual - Page 7

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Siemens Simatic S7-1500 Communication Instruction Manual

2 Solution

2.2

Description of the core functionality

Configuration

The connection between the S7-1200 CPU and the gateway is configured via



the configuration of the gateway as distributed I/O in STEP 7 (TIA Portal).



configuration files of the gateway (cfg and txt files) (see

reference each other.

The configuration files are downloaded to the gateway using the integrated web

server or directly edited.

Configuring and programming the gateway requires no ETS software. The gateway

can access existing data points (group addresses) in the KNX network and provide

its own data points locally on the gateway.

The assignment of the devices' group addresses and physical addresses is not

part of this description. For more information, please refer to the supplied ETS5

sample project. The gateway's physical address (KNX) is set using the "eib1.cfg"

configuration file (see 4.4.3).

Function and data types

This application example contains a STEP 7 project and a data record for the

gateway, where data of different data types is exchanged between an S7-1200

CPU and KNX devices in both directions via the gateway. A decimal value is

transferred from the S7-1200 CPU to the KNX control room unit's display and a

status LED of the KNX wall switch is controlled via a binary signal. Conversely, the

value of the integrated temperature sensor and a configurable decimal value are

transferred from the KNX room control unit. Using the KNX wall switch, a boolean

variable is set/reset in the S7-1200 CPU.

The following data types are used and parameterized:

Table 2-2: SIMATIC / gateway data types

SIMATIC (S7-1200

CPU)

BOOL

REAL

Communication with S7 CPU via KNX Gateway

Entry ID: 109739689,

V1.0,

PROFINET

↔

INT

SINT16

←

FLOAT32

06/2017

Gateway

KNX

BIT

UINT1

SINT16

SFLOAT

Figure

3-3) that

KNX

↔

DPT-1

↔

DPT-7

←

DPT-9