10�2�4 Hysteresis Function - Autosen AL001 Notice D'utilisation

10.2.4 Hysteresis function
The hysteresis keeps the switching state of the output stable if the measured
value varies about the sensing range� In either case set and reset points are
symmetrically arranged around the selected switch point [SPx]� The hysteresis
is the distance between set and reset points; it is calculated on the basis of
the repeatability with a safety factor of 1�5� The calculation is based on the
repeatability for max. 40 klux. → 10.3.3 Table repeatability and accuracy
Example Hno
1� For the output function [Hno] the output switches when the object approaches
and when the switch point (A) is reached�
2� When the object is removed again, the output does not switch back before the
reset point (B) is exceeded�
The reset point (B) is greater than the set point (A)�
1
2
[SPx] = switch point; A = set point; B = reset point
When the output function [Hnc] was selected, set and reset point are reversed�
The output is switched off when the object approaches� When the object is re-
moved, the output switches on�
UK