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5.5
Access protection
Please have regard to the General Notes on Safety in Chapter 3.
5.5.1
Object of protection
The object of protection is the safeguarding
•
of individuals when they access a danger zone.
The SIMATIC FS660I Laser Scanner will detect the passage of individuals and the
intrusion of an entire human body into the scanning field of the laser scanner.
5.5.2
Installation position
Access protection is based on passage monitoring. This is a suitable system when the
access to a machine or to a hazardous zone can be precisely defined in structural terms,
and there is no other unprotected access to the area. In addition, the danger area must
be open to inspection, and the button for manual triggering of the restart interlock must
be situated outside the area. It is best if the laser scanner is firmly installed above the
passage in question, in vertical alignment and in such a way that it cannot be
manipulated. Care must be taken to ensure that the positioning of the SIMATIC FS660I
Laser Scanner does not leave any areas through which a person might slip through
without being detected. The distance of the scanning field limiting the passage and the
boundaries of the detection zone must be defined in such a way that no gaps measuring
more than 150 mm can arise.
5.5.3
Safety-relevant settings, and calculation of the safety distance
To safeguard the protective equipment against inadvertent misadjustment or
manipulation, the detection zones of the SIMATIC FS660I Laser Scanner must be
defined on the basis of a reference boundary. In addition, the response time must be
defined as 80 ms and the restart interlock must be set. To enable the system to
recognise an entire human body, the laser scanner must have a resolution of 150 mm.
These safety-related settings will be automatically enabled in the SIMATIC FS600
Parameterization Software LS4soft configuration and diagnosis software when the
presetting "Passage monitoring" has been selected.
For effective passage monitoring, a safety distance S must be observed between the
detection zone of the laser scanner and the danger zone. The SIMATIC FS660I Laser
Scanner can fulfil its protective function only if it has been installed and positioned in
such a way as to allow for an adequate safety distance. The safety distance ensures that
no body part whatever can reach the danger point until the hazardous movement of the
machine has come to a complete standstill.
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