Daily Functional Checks Of The Protective Device - SICK L 4000 Manual De Instrucciones

Chapter 6
WARNING
312
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Commissioning
Make sure that the operating personnel of the machine protected
by the L 4000 system are correctly instructed by specialist per-
sonnel before being allowed to operate the machine. Instructing
the operating personnel is the responsibility of the machine owner.

6.3.2 Daily functional checks of the protective device

The effectiveness of the protective device must be checked daily, or
before work is commenced, by a specialist or by authorised person-
nel, using the correct test piece.
Completely cover each light beam with a test piece that is not
transparent (at least 30 mm diameter) at the following positions:
Directly in front of the sender,
In the middle between sender and receiver (or the deflector mir-
rors),
Directly in front of the receiver,
On the usage of deflector mirrors, directly in front of and after the
mirror.
This must produce the following result:
At the receiver for the related safety photoelectric safety switch
there must be no LED illuminated and
On the safety evaluation device UE 401 only the red LED must il-
luminate and
As long as the light beam is interrupted, it must not be possible to
initiate the dangerous state of the machine.
No further operation if the green or yellow LED on the safety
evaluation device UE 401 illuminates during the test!
If the green or yellow LED illuminate – even only for a short period–,
work must stop at the machine. In this case the installation of the
L 4000 system must be checked by specialised personnel (see
chapter 5).
Prior to covering each light beam, check with the test piece ...
Whether on the safety evaluation device UE 401, with internal re-
–
start interlock deactivated, the green LED illuminates.
Whether on the safety evaluation device UE 401, with activated
–
internal restart interlock, the yellow LED illuminates ("Reset re-
quired").
If this is not the case, make sure that this condition is reached. The
test is otherwise meaningless.
Operating Instructions
L 4000 system
8010009/TI69/2009-11-26