Pilz PSEN op4F-A-14-180/1 - Manual (Page 60)

PSEN op4F/H-A series OPERATING MANUAL
60 1003067-EN-02
7.9.1 Fixed blanking
Fixed blanking enables a certain part of the protected area (e.g. a certain number of beams)
to be hidden, while all other beams operate normally.
The blanking zone can be achieved using the teach-in process: the user must hold down the
24 V DC N/O teach-in contact (Pin 4 of the 12-pin M12 connector - RX) for at least
3 seconds, while an object interrupts the zone designed for blanking. The blanking zone
becomes active as soon as the teach-in contact is without voltage again.
If the teach-in contact is depressed for more than a minute, the light curtain is blocked
Teach-in can also occur in ACM. The user must place the object/objects within the protected
field and then press the teach-in button (“Reduced resolution / Blanking” in the blanking
section of the PSENopt Configurator).
ACM configuration: Teach-in
With fixed blanking, the beams from the blanked zone must be interrupted, otherwise the
light curtain switches to a SAFE STATE.
The tolerance function can be activated by applying a voltage of 24 V DC at the tolerance
signal during restart (Pin 9 of the 12-pin M12 connector - RX). If the tolerance is activated,
the object can move 1 beam above and below the blanking zone. If the object moves out of
the blanking zone by more than 1 beam, the light curtain is blocked due to a blanking
tolerance error.
The tolerance function is useful if it is only possible for the object to move slightly from its
original position.
If the light curtain is switched off, the tolerance is lost and it will be necessary to repeat the
procedure for setting a tolerance value (described above).
If the tolerance is activated, two blanking zones must be separated by at least two beams
that have not been blanked.
Even if the supply is interrupted or the light curtain is reset, the teach-in configuration is
maintained until the next teach-in operation. The user can delete the teach-in configuration
by carrying out a new teach-in procedure with a protected area that is object-free.
If blanking errors occur, the teach-in configuration will be deleted after the reset.
If the user switches from the blanking configuration to the muting configuration and then back
to the blanking configuration, all potential teach-in zones that were saved initially will be
deleted. Fixed blanking can be combined with floating blanking; at least one synchronisation
beam must remain free.