Endress+Hauser Gammapilot M FMG60 - Page 52

Operation Gammapilot M FMG60 with FOUNDATION Fieldbus
52 Endress+Hauser
Output values
Scaling parameters
The relationship between the output values and scaling parameters is as follows:
The L_TYPE parameter influences the signal conversion:
•Direct:
•Indirect:
• Indirect square root:
Parameter Description
PV Either the primary/secondary output value of the Transducer block or a value associated
with it. Comprises value and status.
OUT The primary value output as a result of executing the Analog Input block. Comprises
value and status.
FIELD_VALUE Raw value of field device in % of PV range with a status reflecting the Sensor condition
before signal characterization L_Type or filtering V_TIME. Comprises value and status.
Parameter Description
CHANNEL Selects the measured value to be input to the Analog Input block
– 0 = no channel defined
– 1 = primary value: measured level/volume
– 2 = secondary value: measured distance
XD_SCALE Scales the Transducer block value to the required engineering unit (EU).
OUT_SCALE Scales the output value in the required engineering units (EU).
L_TYPE Sets the linearization type:
– DIRECT: the Transducer block bypasses the scaling functions
– INDIRECT: the Transducer block value is fed through the linear scaling functions
– INDIRECT SQRT: the Transducer block value is fed through the square root scaling
functions
FIELD_VAL = 100 x
CHANNEL_VALUE - XD_SCALE_MIN
XD_SCALE_MAX - XD_SCALE_MIN
PV=CHANNEL_VALUE
PV=
FIELD_VALUE
100
x (OUT_SCALE_MAX-OUT_SCALE_MIN)+OUT_SCALE_MIN
PV=
FIELD_VALUE
100
x (OUT_SCALE_MAX-OUT_SCALE_MIN)+OUT_SCALE_MIN