Regular thorough check
The check must detect if it is possible to enter the hazardous area without being
detected. Such possibilities may exist due to modifications, manipulations or external
influences.
The following points are often helpful for the definition of the check:
•
Which check must be carried out and how is it carried out?
°
Test rod check
°
Visual check of the machine and the protective device
•
How often does the check have to be carried out?
•
Do the machine operators have to be notified of the check and do they need to be
instructed accordingly?
b
Define all guidelines for the check.
Further topics
•
"Checklist for initial commissioning and commissioning", page 107
•
•
"Visual check of the machine and the protective device", page 43
4.5.1
Test rod check
Overview
The rod test check is used to check whether the hazardous point is only accessible via
the protective field of the safety light curtain and whether the protective device is able
to identify each time the hazardous point is approached.
The test is carried out with an opaque test rod whose diameter corresponds to the reso‐
lution of the safety light curtain.
If several safety light curtains are connected to each other in a cascade, the complete
check for every safety light curtain in the cascade is carried out. During the check,
watch the OUT LED and the RES LED of the twin stick that is being checked.
Important information
DANGER
Use of incorrect test rods
Persons or parts of the body to be protected may not be detected in operation.
b
Only use the included test rod with the diameter specified on the type label of the
safety light curtain.
b
Do not use any test rods with a similar or the same diameter of other safety light
curtains.
DANGER
Hazard due to unexpected starting of the machine
b
Make sure that the dangerous state of the machine is and remains switched off
during the check.
b
Make sure that the outputs of the safety light curtain have no effect on the
machine during the check of the components.
PROJECT PLANNING
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8012624/10OM/2018-08-09 | SICK
O P E R A T I N G I N S T R U C T I O N S | miniTwin4
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Subject to change without notice