Endress+Hauser Fieldbus Levelflex M FMP43 Operating Instructions Manual page 51

Levelflex M FMP43 with FOUNDATION Fieldbus
Endress+Hauser
Scaling parameters
Parameter Description
CHANNEL Selects the measured value to be input to the analogue input block
– 0 = no channel defined
– 1 = primary value: measured level/volume
– 2 = secondary value: measured distance
XD_SCALE Scales the Sensor block value in the required engineering units (EU).
OUT_SCALE Scales the output value in the required engineering units (EU).
L_TYPE Sets the linearization type:
– DIRECT: the Sensor block value bypasses the scaling functions
– INDIRECT:the Sensor block value is fed through the linear scaling functions
– INDIRECT SQRT: the Sensor block value is fed through the square root scaling func-
The relationship between the output values and scaling paramaters for the Levelflex M is as follows:
CHANNEL
= ×
FIELD _ VAL 100
XD
The L_TYPE parameter influences the signal conversion:
• Direct:
PV = CHANNEL_VALUE
• Indirect:
FIELD _ VALUE
(
= ×
PV OUT
100
• Indirect square root:
FIELD _ VALUE
= ×
PV
100
Output response parameters
Parameter Description
LOW_CUT Not relevant to level measurement!
Determines a threshold for square root linearization below which the output value is set
to zero.
PV_FTIME Sets the time constant for the output value.
tions
−
_ VALUE XD _ SCALE
−
_ SCALE _ MAX XD _ SCALE
−
_ SCALE _ MAX OUT _ SCALE
(
−
OUT _ SCALE _ MAX OUT
_ MIN
_ MIN
)
+
_ MIN OUT _ SCALE _
)
+
_ SCALE _ MIN OUT _ SCALE
Operation
MIN
_ MIN
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