Siemens SIMATIC NET PROFIBUS Bedienungsanleitung PDF herunterladen (Seite 19)

19

PROFIBUS

Transitions

DP/PA link and DP/PA coupler

The DP/PA link and DP/PA coupler

implement the transition between

PROFIBUS-DP and PROFIBUS-PA.

DP/PA link

The DP/PA link is used for large

volumes of project data and high time

requirements.

The DP/PA link is a slave on

PROFIBUS-DP and a master on

PROFIBUS-PA.

The programmable controller/automa-

tion system addresses the field devices

via the DP/PA link as a modular slave,

whose submodule are the PA units.

DP/PA coupler

The DP/PA coupler is used for small

volumes of project data and low time

requirements.

When the DP/PA coupler is used, the

data transfer rate on PROFIBUS-DP is

limited to 45.45 kbit/s. The volume of

project data is defined either by the

maximum number of addressable

slaves (field device) or by the maxi-

mum cycle time.

IE/PB link

The IE/PB link, as a self-contained

component, creates a seamless transi-

tion between Industrial Ethernet and

PROFIBUS. Thus, for example, control

and monitoring systems can simply

access field devices on PROFIBUS

from Industrial Ethernet.

This makes it possible to implement

vertical integration from command level

to field level.

The IE/PB link supports PROFInet

functionality.

DP/AS interface link

The DP/AS interface link allows network

transition between PROFIBUS-DP and

the AS interface.

It is the PROFIBUS-DP slave (accord-

ing to EN 50170) and the AS interface

master (according to EN 50 295) and

enables the AS-Interface to operate on

PROFIBUS-DP.

The DP/AS interface is available in two

versions:

The DP/AS 20E interface link

degree of protection IP 20

Can link up to 62 AS interface slaves

and implement integrated

analog value transmission

(according to the extended AS inter-

face specification V2.1).

The DP/AS interface link

degree of protection IP 65

Up to 31 AS interface slaves can be

connected to the DP/AS interface link.

DP/EIB link

The DP/EIB link enables connection of

the two open standard communication

systems for production and process

automation PROFIBUS-DP and for

building automation EIB.

In this way, EIB for building automation

is integrated into PROFIBUS-DP.

Figure 37: DP/PA link Figure 38: IE/PB link

Figure 39: DP/AS interface link Figure 40: DP/EIB link

1 2 ... 14 15 16 17 18 19 20 21 22 23 24

Kommentare zu diesen Handbüchern

Keine Kommentare