Lenze i700 Manual User Manual download pdf (Page 126)

Safety engineering

Introduction

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126

EDS700ACBA EN 4.0

10 Safety engineering

10.1 Introduction

With increasing automation, protection of persons against hazardous movements is

becoming more important. Functional safety describes the measures needed by means of

electrical or electronic equipment to reduce or remove danger caused by failures.

During normal operation, safety equipment prevents people accessing hazardous areas. In

certain operating modes, e.g. set−up mode, work needs to be carried out in hazardous

areas. In these situations the machine operator must be protected by integrated drive and

control measures.

Drive−based safety provides the conditions in the controls and drives to optimise the safety

functions. Planning and installation expenditure is reduced. In comparison to the use of

standard safety engineering, drive−based safety increases machine functionality and

availability.

Integrated safety engineering

i700 controllers are available with drive−based safety.

The integrated safety system can be used for the protection of persons working on machi-

nes in accordance with the Machinery Directive.

The motion functions continue to be executed by the controller. The integrated safety sy-

stem monitors the safe compliance with the limit values and provides the safe inputs. If

monitored limit values are exceeded, the integrated safety system starts control functions

directly in the controller according to EN 60204−1 to counteract possible errors.

The safety functions are suitable for applications according to IEC 61508 to SIL 3 and

achieve a performance level (PL) e and the control category 4 according to EN ISO 13849−1.

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Lenze i700 Manual User Manual Page 126