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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20958-01 Rev 02