Table of Contents
Advertisement
4.2
Access guarding by passage monitoring
Access guarding by passage monitoring (whole body trip control) is a suitable method
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. It is best to mount
the laser scanner above the passage in question, in vertical alignment. In order to secure
the protective equipment, laser scanner and fence against inadvertent misadjustment
and manipulation, the detection zones of the SIMATIC FS660I Laser Scanner must be
defined on the basis of a reference boundary. In this operating mode, the scanner will
use the polled environment as a reference and so check for changes in the layout of the
protective equipment, as well as checking every one of the individual measurements it
carries out with a view to detecting an intrusion. An example of the configuration of the
SIMATIC FS660I Laser Scanner to give access protection by passage monitoring will be
found in Chapter 5.5.
a
= SIMATIC FS660I Laser Scanner
b
=
Reference boundary of the detection zone
c
=
Emergency stop and triggering of the manual restart interlock
Fig. 4.2-1:
24
a
c
Access guarding by whole body trip control with system check of a
reference boundary
b
SF1
SF1 =
Detection zone 1, enabled
Advertisement
Table of Contents
