FUNCTIONS
57
7
7.9.5 Reduced Resolution
Reduced Resolution is a particular kind of floating blanking in which more than one object
can intercept each a defined number of beams with the ESPE remaining in normal operation.
The number that follows indicates how many adjacent beams can be intercepted by the
object to allow the light curtain to remain in Normal Operation. For example, with Reduced
Resolution 2 the object intercepts 1, 2 or no beams and the light curtain remains in Normal
Operation. This function can be set only by means of ACM.
NB: This function affects the effective resolution of the light curtain and the user is
warned about it.
7.9.6 Dimension
This value indicates the size of blanking zone.
This function can be set only by means of ACM.
7.9.7 Position
This value indicates the first beam of the blanking zone, starting from the bottom of the ESPE
(the bottom of the ESPE is the side with the leds and the push buttons).
Since in floating blanking configuration zones haven’t a fixed position, it is valid only in fixed
blanking.
This function can be set only by means of ACM.
7.9.8 Tolerance
There are 2 types of tolerance: position and dimension.
Position Tolerance
It indicates the number of beams in blanking zone that can be intercepted above and below
the blanking zone without making the OSSDs switch off.
In presence of wide vibrations, it is useful to use this function in order to avoid the changing
of the OSSDs’ status.
Dimension Tolerance
It indicates how many beams the object can be smaller than the number fixed by the value
Dimension. It’s a negative quantity.
It is useful when an object intercepts half optic; in this case a little vibration can make the
OSSDs change status.
Tolerance can be selected via wire or ACM.
If the user wants to select this function with ACM, he must have at least one blanking zone;
then he can choose Position or Dimension Tolerance. Next tables shows the different cases
on a blanking zone of 3 beams.
If the light curtain is configured with ACM it doesn’t take care if the Tolerance has been
selected by means of Tolerance wire (pin 9 of M12-12 poles - RX).
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