Endress+Hauser Levelflex FMP56 Operating Instructions Manual page 152

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Switch-on value
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 Setup → Advanced setup → Switch output → Switch-on value
Switch output function (→  150) = Limit
Defines the switch-on point.
The output is closed if the assigned process variable rises above this point.
Signed floating-point number
The switching behavior depends on the relative position of the Switch-on value and
Switch-off value parameters:
Switch-on value > Switch-off value
• The output is closed if the measured value is larger than Switch-on value.
• The output is opened if the measured value is smaller than Switch-off value.
A Switch-on value
B Switch-off value
C Output closed (conductive)
D Output opened (non-conductive)
Switch-on value < Switch-off value
• The output is closed if the measured value is smaller than Switch-on value.
• The output is opened if the measured value is larger than Switch-off value.
A
B
Levelflex FMP56, FMP57 HART
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C
D
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