Burkert Type 8619 - Manual (Page 71)

69
Adjustmentandcommissioning
configuring in "hysteresis" operating
The output status changes when a threshold is reached:
• by increasing process input value, the output status changes when the high threshold is reached.
• by decreasing process input value, the output status changes when the low threshold is reached.
ON
OFF
contact
Low High process input ("PV")
not inverted
ON
OFF
contact
Low High process input ("PV")
inverted
Figure 58 : Hysteresis operating
PV: Choose the process input associated with the "System switch" event.
LOW: Choose the value of the low switching threshold.
HIGH: Choose the value of the high switching threshold.
INVERT: Invert the event or not.
DELAY: Choose the value of the time-out before switching. This is valid for both thresholds, "Low" and "High".
Switching is only done if one of the thresholds, high or low, is exceeded for a duration longer than this time-out.
configuring in "Window" operating
The output status changes as soon as any threshold (low or high) is reached..
ON
OFF
contact
Low High process input ("PV")
not inverted
ON
OFF
contact
Low High process input ("PV")
inverted
Figure 59 : Window operating
PV: Choose the process input associated with the "System switch" event.
LOW: Choose the value of the low switching threshold.
HIGH: Choose the value of the high switching threshold.
INVERT: Invert the event or not.
DELAY: Choose the value of the time-out before switching. This is valid for both thresholds, "Low" and "High".
Switching is only done if one of the thresholds, high or low, is exceeded for a duration longer than this time-out.
Type 8619
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