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Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
Chapter 4 Safety Function
A Teach-in procedure can also be conducted with the Rockwell Automation
Connected Components Workbench software and an installed optical
interface device (see
Optical Interface Device (OID) on page 106
).
These options lead to the deletion of taught fixed blanking areas:
•
Change DIP switch setting and confirm new DIP setting.
•
Insert and confirm another plug-in type.
Reduced Resolution (Object
Number Limited)
Reduced resolution is a type of blanking without monitoring whether the
beams are interrupted. The comparable blanking function with monitoring is
called floating blanking. Floating blanking and reduced resolution have
similar functionality, the difference, according to the standard IEC 61496, is
the object monitoring.
Reduced resolution is always specified in combination with a beam number
There are different types of reduced resolution:
•
All blanked beams must be adjacent. The maximum size of the object is
equal to the beam value. This type is only good for one single object
(reduced resolution, single object).
•
Blanked beams can be, but do not have to be, adjacent. The sum of the
size of all objects in the protective field is not larger than the beam value
(reduced resolution, multiple objects, object number limited).
•
Blanked beams can be, but do not have to be, adjacent. The size of each
object in the protective field is not larger than the beam value (reduced
resolution, multiple objects, object number unlimited).
The reduced resolution that can be activated with a DIP switch in a 450L-E
safety light curtain refers to the definition (b) multiple objects, object number
limited.
Reduced resolution is not available on 450L PAC safety light curtains.
The reduced resolution mode of operation is activated through DIP switch
settings that are on the following plug-ins:
•
450L-APR-BL-5 (
•
450L-APR-MU-8 (
Reduced resolution of one beam or reduced resolution of two beams allows
one or two beams that are located anywhere in the protective field to be
blanked out. An example is when blocked beams are ignored and the 450L-E
safety light curtain remains with OSSD outputs active. Reduced resolution
allows an object to float in (move within, or in and out of) the 450L-E safety
light curtain protective field without causing the light curtain outputs to
change to the OFF state. For details, see
.
For reduced resolution with the object number limited, the maximum number
of blanked objects is equal to the beam number (see
If activated by the DIP switch the reduced resolution is active over the entire
protective field, except the zones that are already taught with another blanking
type.
IMPORTANT
The blanking modes that can be activated with the DIP switches in a
450L-E safety light curtain system are equal to the blanking modes that
can be activated in a 440L safety light curtain system.
