Datalogic SG4-14-030-OO-P, Instruction Manual

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FUNCTIONS
55
7
7.9.1 Fixed Blanking
Fixed Blanking allows a fixed portion of the controlled area (i.e. a fixed set of beams) to be
occupied, while all the other beams operate normally.
The blanking zone can be obtained through a Teach-in operation: the user has to keep
pressed the 24VDC normally-open contact of Teach-in (pin 4 of M12-12 poles - RX) for at
least 3 seconds while an object intercepts the area to be blanked. The blanking zone
becomes active after the Teach-in contact has been released.
If Teach-in contact is kept pressed for a time greater than 1 minute the light curtain goes in a
lockout failure.
The Teach-in operation can be performed in ACM too. The user has to place the object(s)
within the protected area and press the button “Teach-in” (in “Reduced resolution / Blanking”
in the blanking section of the GUI).
ACM Configuration: Teach-in operation
In Fixed Blanking the beams of the blanked zone have to remain intercepted, otherwise the
light curtain goes in SAFE state.
The Tolerance function can be activated by keeping pressed at startup the 24VDC normally-
open contact on Tolerance signal (pin 9 of M12-12 poles - RX). With Tolerance active the
object can move 1 beam above or below the blanking zone.
If object moves more than 1
beam out of the blanking zone ESPE locks-out in Blanking Tolerance Fault.
Tolerance function is useful if there is the possibility that the object can have little movements
from its initial position.
If the light curtain is switched off the Tolerance is lost and a new Tolerance operation
(described here above) is necessary.
With Tolerance active at least two not blanked beams must separate two blanking zones.
Teach-In Configuration is kept on both power disconnection and ESPE Reset, till next Teach-
In. The user can erase the Teach-In Configuration by making a new Teach-in operation with
the controlled area free from objects.
On a Blanking Faults Teach-in configuration gets erased after Reset.
If the user changes configuration from blanking to muting and then blanking again, every
possible Teach-in zone stored at the beginning is cancelled.
Fixed Blanking can be combined with floating blanking; at least one sync beam must be free.