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Operating Instructions
Chapter
7
C4000 Select
8012247/RI61/2007-11-30
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
49
Commissioning
7.3.3
Daily functional checks of the protective device
The effectiveness of the protective device must be checked daily by a specialist or by
authorized personnel, using the correct test rod.
Always test along the complete hazardous area to be protected, never solely at the
mounting position of the light curtain.
How to check the effectiveness and correct function of the safety light curtain:
Select the correct test rod depending on device resolution. By means of the configura-
tion, the entire system or individual areas can have a
physical resolution
that is diffe-
rent
to the effective resolution
, e.g. in case of floating blanking. In this case you must
select the test rod to suit the effective resolution. The effective resolution is described
with the related function in chapter 4.
Example:
– physical resolution 30 mm
– operation with single beam floating blanking
– effective resolution 50 mm
Use a test rod for a resolution of 50 mm.
Do not operate the machine if the output LED turns green during the test!
If the output LED turns green
during the test
, even for a short period, work must stop at
the machine. In this case the mounting and the configuration of the safety light curtain
must be checked by qualified safety personnel (see chapter 5).
Before
inserting the test rod, ensure that the output LED is green and the protective
field is clear of obstruction. Once the test rod is inserted, the output LED should remain
red during the entire time the test rod is present in the protective field. This test is
meaningless if it is completed when the output LED is already red before the test rod
has been inserted into the protective field.
Move the test rod slowly through the protective field to be tested, as shown in
in
Fig. 33.
Then move the test rod along the edges of the protective field, as shown in
This procedure allows you to test if the point-of-operation/reaching around protection is
functioning correctly (see 5.2 “Steps for mounting the device” on page 34).
If you use one or more deflector mirrors (e.g. PNS), then also guide the test rod slowly
through the protective field directly in front of the mirrors.
During all tests, the output LED should remain red.
Note
WARNING
Note
Fig. 33: Daily checks of the
protective device