CiDRA Use of Foundation Fieldbus Protocol with SONARtrac Transmitters User Manual
Page 16

Table 3 Transducer Block Configurations (Page 3)
ENVIRONMENT
SOS_TEMPERATURE_INPUT_SELECTION
Unsigned
Char
R/W
Selects the source of the temperature used in GVF
calculations. 'Fixed' uses 'SOS Process Temperature'*
'Sensor 1' uses the 4-20mA input channel 1* 'Sensor 2'
uses 4-20mA input channel 2* Protocol uses values
written to Fieldbus AO Channel 11.
SOS_PRESSURE_INPUT_SELECTION
Unsigned
Char
R/W
Selects the source of the pressure used in GVF
calculations. 'Fixed' uses 'SOS Process Pressure'*
'Sensor 1' uses the 4-20mA input channel 1* 'Sensor 2'
uses 4-20mA input channel 2* Protocol uses values
written to Fieldbus AO Channel 10.
SOS_TEMPERATURE_UNITS
Unsigned
Char
R/W
Selects units used for input of 'SOS Process
Temperature'.
SOS_PRESSURE_UNITS
Unsigned
Char
R/W
Selects units used for input of 'SOS Process Pressure'.
SOS_PROCESS_TEMPERATURE Float
R/W
Constant temperature for GVF calculations when 'Fixed'
is selected for 'SOS Temperature Input Selection'. In
configured units.
SOS_PROCESS_PRESSURE Float
R/W
Constant pressure for GVF calculations when 'Fixed' is
selected for 'SOS Pressure Input Selection'. In
configured units.
ALTITUDE_UNITS
Unsigned
Char
R/W
Selects units used for entry of 'Altitude'.
ALTITUDE Float
R/W
Altitude correction applied to SOS pressure. In
configured units.
DISPLAY
FLOW_VOLUME_UNITS
Unsigned
Char
R/W
Selects units used to display and log flow volume.
FLOW_TIME_UNITS
Unsigned
Char
R/W
Selects units used to display and log flow time.
FLOW_LOW_CUTOFF_PCT Float
R/W
Low flow cutoff as a % of flow measurement range
(defined by 'Flow Min' and 'Flow Max'). Will not display
or output flow reading if flow rate is below this setting.
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