157
Reference Manual
00809-0100-4021, Rev GC
Section 4: FOUNDATION fieldbus Configuration
April 2014
Foundation™ fieldbus configuration
L_TYPE is Indirect
When an inferred measurement is made based on the sensor measurement, set the XD_SCALE
to represent the operating range that the sensor will see in the process. Determine the inferred
measurement values that correspond to the XD_SCALE 0 and 100% points and set these for the
OUT_SCALE.
Note
To avoid configuration errors, only select Engineering Units for XD_SCALE and OUT_SCALE that
are supported by the device. The supported units are:
When the engineering units of the XD_SCALE are selected, this changes the engineering units of
the PRIMARY_VALUE_RANGE in the Transducer Block to the same units.
THIS IS THE ONLY WAY TO CHANGE THE ENGINEERING UNITS IN THE SENSOR TRANSDUCER
BLOCK, PRIMARY_VALUE_RANGE PARAMETER.
Configuration examples
Sensor Type: 4-wire, Pt 100 = 385.
Desired measurement process temperature in the –200 to 500 °F range. Monitor the
transmitter electronics temperature in the –40 to 185 °F range.
Transducer block
If host system supports methods:
1. Click on Methods.
2. Choose Sensor Connections.
(1)
3. Follow on-screen instruction to setup Sensor 1 as a 4-wire, Pt 100 = 385.
If host system does not support methods:
1. Put transducer block into OOS mode.
a. Go to MODE_BLK.TARGET.
b. Choose OOS (0x80).
Temperature (channel 1 and 2) Terminal (body) temperature
°C °C
°F °F
K K
°R R
mV
(1) Some choices may not be available due to the current configuration of the device.
Examples:
a) Sensor 2 cannot be configured at all if Sensor 1 is set up as a 4-wire sensor
b) If Sensor 2 is configured, Sensor 1 can not be set up as a 4-wire sensor (and vise-versa)
c) When selecting a thermocouple as the sensor type, a 3- or 4-wire connection cannot be selected.
In this situation, configure the other sensor as “Not used.” This will clear the dependencies that are preventing the configuration of the desired
sensor.
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