Operation
Gammapilot M FMG60 FOUNDATION Fieldbus
52
Hauser
Scaling parameters
Parameter
Description
CHANNEL
Selects which value is entered in 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 to the required engineering unit (EU).
L_TYPE
Sets the linearization type
• DIRECT: the Transducer block bypasses the scaling functions
• INDIRECT: the Transducer block is scaled linearly
• INDIRECT SQRT: the Transducer block is scaled via a square root function
The relationship between the output values and scaling parameters is as follows:
FIELD_VAL = 100 x (CHANNEL_VALUE - XD_SCALE_MIN) / (XD_SCALE_MAX -
XD_SCALE_MIN)
The L_TYPE parameter influences the linearization:
• DIRECT:
PV = CHANNEL_VALUE
• INDIRECT:
PV = FIELD_VALUE / 100 x (OUT_SCALE_MAX - OUT_SCALE_MIN) +
OUT_SCALE_MIN
• INDIRECT SQRT:
PV = (FIELD_VALUE/100)
1/2
x (OUT_SCALE_MAX - OUT_SCALE_MIN) +
OUT_SCALE_MIN
Parameters to control the output behavior
Parameter Description
LOW_CUT Not relevant for level measurement!
Specifies a threshold value for square root linearization below which the output value is set to zero.
PV_FTIME Specifies the time constant for output value damping.
Alarm parameters
Parameter
Description
ACK_OPTION Specifies how alarms and warnings should be acknowledged.
ALARM_HYS Specifies the hysteresis (in engineering units) for all the configured alarms. A hysteresis of 2%,
for example, on a HI_HI_LIMIT of 95% would trigger the alarm when the level reaches 95% and
deactivate it when the level drops below 93%.
A hysteresis of 2%, for example, on a LO_LO_LIMIT of 5% would trigger the alarm when the
level drops below 5% and deactivate it when the level reaches 7%.
HI_HI_PRI
The priority (1 - 15) of the HI_HI alarm
HI_HI_LIM
Specifies the HI_HI warning limit (in engineering units)
HI_PRI
The priority (1 - 15) of the HI alarm
HI_LIM
Specifies the HI alarm limit (in engineering units)
LO_PRI
The priority (1 - 15) of the LO alarm
LO_LIM
Specifies the LO warning limit (in engineering units)
LO_LO_PRI
The priority (1 - 15) of the LO_LO alarm
LO_LO_LIM
Specifies the LO_LO alarm limit (in engineering units)
