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The reference boundary must cover at least two sides of the detection zone. The
detection zone itself must be defined in such a way that no gaps can arise through which
a person could pass through the passage without being detected. The reference
boundary is defined with reference to the non-moving parts of the passage. These will
then be constantly monitored by the laser scanner, so that any individuals intruding or
other manipulative intervention will be detected beyond the possibility of doubt. In
defining the reference boundary, please also have regard to the indications given in the
Operating Instructions for the SIMATIC FS600 Parameterization Software LS4soft
configuration and diagnosis software.
5.6
Protecting danger points
Please have regard to the General Notes on Safety in Chapter 3.
5.6.1
Object of protection
The object of protection is the safeguarding
•
of individuals who work with a machine or spend time in the danger zone
associated with it.
The SIMATIC FS660I Laser Scanner will detect the body parts of individuals and the
intrusion of these body parts into the scanning field of the laser scanner. In this operating
mode, hand and arm protection is effectively realised.
5.6.2
Installation position
Safeguarding of danger points on the basis of hand and arm protection is a suitable
method if the machine operator, in close proximity to the danger zone, needs to halt the
hazardous movement of the machine or to coordinate the handling of workpieces or their
removal from the machine. It is best if the laser scanner is firmly installed above the
danger zone, in such a way that it cannot be manipulated. The health and safety officer
must ensure that the installation position of the SIMATIC FS660I Laser Scanner does
not leave any areas free through which manual intrusion could be effected. If
appropriate, additional protective facilities should be installed to exclude any possibility
of the operator's reaching over or around or getting behind the barrier. To prevent the
latter, the distance from the scanning field to the machine table must not be more than
75 mm. This can be guaranteed if suitable screens are installed for the monitoring of the
reference boundary (see the illustrations in this chapter).
5.6.3
Safety-related settings, and calculation of the safety distance
In order to safeguard the protective equipment against inadvertent misadjustment and
manipulation, the detection zones of the SIMATIC FS660I Laser Scanner must be
defined on the basis of a reference boundary. To make it possible to recognise the hand
or arm of a person, the laser scanner must have a resolution of 30 or 40 mm. These
safety-related values will be automatically set in the SIMATIC FS600 Parameterization
Software LS4soft configuration and diagnosis software when the presetting "Hand
protection" or "Arm protection" has been selected. At the same time the detection zone
limits will be limited to 1.60 m or 2.20 m, and cannot be extended beyond this.
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