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Siemens IK PI · 2015

AS-Interface

ASIsafe

Introduction

■

Overview

ASIsafe – Safety is included

ASIsafe enables the integration of safety-related components,

such as EMERGENCY-STOP pushbuttons, protective door

switches or safety light arrays, in an AS-Interface network. These

are fully compatible with the familiar AS-Interface components

(masters, slaves, power supplies, repeaters, etc.) in accordance

with IEC 62026-2 and are operated in conjunction with them on

the yellow AS-Interface cable.

Tested safety

The transmission method for safety-related signals is approved

for implementing applications up to PL e according to EN ISO

13849-1 and up to SIL 3 according to IEC 62061/IEC 61508.

Higher-level control

Nodes on the AS-Interface bus are as usual controlled in opera-

tion by the standard program of the higher-level SIMATIC (F)

CPU or by a SINUMERIK control.

Configuring safety functions

In order to implement safe functions, the information from the

safe and standard nodes must be combined logically and fur-

ther parameters set. The configuration of the safety functions de-

pends on which safety solution is being used:

• In the case of the AS-i safety solution with F-CPU: In conjunc-

tion with the SIMATIC AS-i F-Link as a safe AS-i master, all

safety functions and logic operations are configured via STEP

7 and processed in the controller (F-CPU) by the fail-safe pro-

gram.

• In the case of the AS-i safety solution with local evaluation by

MSS: In conjunction with the Modular Safety System, all safety

functions and logic operations are configured using the MSS

ES software and processed in the MSS central unit.

AS-i safety solution with F-CPU

AS-Interface configuration with SIMATIC AS-i F-Link, consisting of an ET 200SP station with CM AS-i Master ST and F-CM AS-i Safety ST modules

The SIMATIC AS-i F-Link allows AS-Interface to be used with fail-

safe SIMATIC or SINUMERIK controls.

The allocation of tasks is as follows:

• Acquisition of safety-related signals via safe input slaves on

the AS-Interface bus.

Further signals can be acquired via other SIMATIC F-DI

modules.

• Evaluation and processing of signals via the fail-safe SIMATIC

or SINUMERIK control

• Reaction by safe output modules on the AS-Interface bus or

other SIMATIC F-DQ modules

The SIMATIC AS-i F-Link is implemented as a modular arrange-

ment of ET 200SP components.

Simple combination of the CM AS-i Master ST and F-CM AS-i

Safety ST modules in one ET 200SP station with PROFINET

interfacing results in a powerful PN/AS-i F-Link, which can be

expanded further in a modular fashion using ET 200SP I/O

modules.

Using these design methods, it is possible to create configura-

tions for virtually any application. Besides the single AS-i master,

double, triple or generally multiple masters can be realized with

or without fail-safe functionality.

Safety-oriented

processing

Operational

control

Safe control

SIMATIC S7-300F

Safe position switch with door interlock

Field module

Load feeder with safe AS-i outputs

Digital K45 field module

3RA2 load feeder

Safe EMERGENCY-STOP

IC01_00288

AS-Interface / ASIsafe

PROFINET / PROFIsafe

SIMATIC

AS-i F-Link

SIMATIC

AS-i F-Link

AS-Interface / ASIsafeAS-Interface / ASIsafe

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