Siemens Simatic S7-1500 Manuel d'instructions pour la communication - Page 4

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1 Task

Task

1.1

Gateways enable communication between two networks/bus systems that use

different communications protocols.

KNX is a fieldbus for building automation. Technically, KNX is the successor to the

European Installation Bus (EIB), adding communication mechanisms and

transmission media.

The functionality of a KNX system can be extended by integrating an S7 CPU into

a KNX system via a gateway. An S7 CPU enables the use of various functions and

statements for creating a control program and processing data.

The "LGF (Library of general functions)" for STEP 7 (TIA Portal) and S7-1200 / S7-

1500 additionally provides complementary functions such as an astronomical clock,

weekly timer, FIFO and many more (see \4\).

1.2

The task is to establish, using a KNX gateway, a communication connection

between an S7 CPU via PROFINET (PN) and a KNX device via the KNX bus.

Each KNX device has a physical address (PA) via which the device can be

accessed. The individual functions of a KNX device are addressed by group

addresses (GA).

Through bidirectional data exchange between a KNX gateway and an S7 CPU,

signals of a KNX device are to be processed in the S7 CPU or KNX devices are to

be controlled using the S7 CPU.

The figure below provides an overview of the automation task.

Figure 1-1: Block diagram of the automation task

SIMATIC

CPU

Communication with S7 CPU via KNX Gateway

Entry ID: 109739689,

V1.0,

PROFINET

06/2017

KNX

gateway

KNX devices

KNX