FUNCTIONS
68 SG4 EXTENDED
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 t
o 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 op
tic; in this case a little vibration can make
the OSSDs change status.
Tolerance can be selected via wire or ACM.
When enabled via wire (pin 9 of M12 12-pole connector connected to 24V), a position
t
olerance of 1 beam and a dimension tolerance of -1 beam is configured.
ACM setting overrides these values and Tolerance wire input is disabled.
If the user wants to select this function with ACM, he must have at least one blanking
z
one; then they can choose Position or Dimension Tolerance. Next tables show the dif-
ferent 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
select
ed by means of Tolerance wire (pin 9 of M12-12 poles - RX).
The presence of the tolerance is indicated with the blinking of some LEDs in the user
i
nterface as shown below.
NOTE
Figure 52 - Tolerance indication
Figure 53 - Position tolerance
Tolerance affects the ESPE resolution. Please consider the new resolution
to calculate a new mechanical mounting.
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