SG4E Full Rev01.pdf - Datasensor

FUNCTIONS
7
7.9 BLANKING
Blanking is an auxiliary function of safety light curtains for which the introduction of an
opaque object inside parts of the light curtain’s controlled area is allowed without stopping
the normal functioning of the machine. Blanking is only possible in the presence of
determined safety conditions and in accordance with a configurable operating logic.
The blanking function is therefore particularly useful when light curtain’s controlled area must
be inevitably intercepted by the material being worked or by a fixed or mobile part of the
machine. In practice, it is possible to keep light curtain’s safety outputs in a normal operation
condition and the machine working, even if a pre-determined number of beams within the
controlled area is being intercepted.
The user can even connect a lamp (whose characteristics are reported in chapter 11) to
indicate that a blanking function is active. The use of the lamp is not mandatory for a light
curtain in blanking mode. The lamp begins to blink in the following cases:
- the light curtain is in any fixed blanking mode and the object is removed from the blanked
zone
- the light curtain is in floating mode with total surveillance and the dimension of the taught
object changes or the object is removed from the blanked zone.
To activate all blanking functions Blanking Operation can be selected either in BCM or in
ACM.
BCM Configuration: Muting/Blanking Selection
Muting
Blanking
Led 3 ON YELLOW
Led 3 OFF
ACM Configuration: Muting/Blanking Selection
Blanking function can be realized in two different modes: fixed blanking and floating blanking.
These two modes can be enabled individually or contemporaneously.
53