Pilz PSEN op4F-A-14-180/1 - Manual (Page 59)

OPERATING MANUAL PSEN op4F/H-A series
1003067-EN-02 59
7.9 Blanking
Blanking is a function of the safety light curtains, which enables an opaque object to be
inserted into the protected field without stopping the machine’s normal operation. Blanking
can only be used when certain safety conditions are present and in accordance with a
configurable operating logic.
The blanking function is particularly useful when the light curtain's protected field will
inevitably be within moving parts or material of the machine. So it is possible to maintain the
light curtain’s safety outputs on working machinery under normal operating conditions, even
if a pre-defined number of beams in the protected area has been interrupted.
The blanking function can be selected in two ways: fixed blanking and floating blanking.
These two modes can be enabled individually or simultaneously.
Users also have the option to connect a lamp (properties are listed under Chapter 10), which
indicates that the blanking function is activated. It is not absolutely necessary to use a lamp
for a light curtain that is in blanking mode.
The lamp begins to flash in the following circumstances:
−
The light curtain is in a fixed blanking mode and the object is being removed from the
blanked zone;
−
The light curtain is in floating mode with total surveillance and the dimensions of the
detected object are changing or the object is being removed from the blanked zone.
To enable all blanking functions, the blanking function can be selected in either BCM or
ACM.
BCM configuration: Selection of muting/blanking
P
W
R
O
S
S
D
E
DM
A
CM
LEVEL
Muting LED 3 ON yellow
Blanking LED 3 OFF
ACM configuration: Selection of muting/blanking