Switching Functions - WIKA DSSA11SA Betriebsanleitung

5. Commissioning, operation

5.8 Switching functions

Hysteresis function (configurable via teach function or IO-Link)
If the system pressure fluctuates around the set point, the
EN
hysteresis keeps the switching status of the outputs stable.
With increasing system pressure, the output switches when
reaching the switch point (SP).
Normally open contact (HNO): Active
■
Normally closed contact (HNC): Inactive
■
With system pressure falling again, the output will not switch
back before the reset point (RP) is reached.
Normally open contact (HNO): Inactive
■
Normally closed contact (HNC): Active
■
Window function (configurable via teach function or IO-Link)
The window function allows for the control of a defined
range.
When the system pressure is between window high (FH)
and window low (FL), the output switches on.
Normally open contact (FNO): Active
■
Normally closed contact (FNC): Inactive
■
When the system pressure is outside window high (FH) and
window low (FL), the output does not switch on.
Normally open contact (FNO): Inactive
■
Normally closed contact (FNC): Active
■
Adjustability:
Switch point/window high
■
The value must be higher than the reset point or window low. The minimum difference
is 0.25 % of the measuring range. With a setting less than 0.25 %, the reset point will be
adjusted automatically.
Reset point/window low
■
The value must be lower than the switch point or window high. The minimum difference
is 0.25 % of the measuring range. With a setting less than 0.25 %, the switch point will
be adjusted automatically.
18
Fig.: Hysteresis function
Fig.: Window function
WIKA operating instructions, model DSSA11SA