705-5100-F21 Datasheet, PDF (23/52 Pages) Magnetrol International, Inc. – Enhanced Model 705 with PROFIBUS PA™ Digital Output

4.3 GWR Transducer Block
The GWR TRANSDUCER block is a custom block
containing parameters that support the Enhanced Eclipse
Model 705 level transmitter. It contains the GWR probe
configuration, diagnostics, and calibration data, and outputs
level with status information.
The TRANSDUCER block parameters are grouped in a
useful configuration. There are both read-only parameters
and read-write parameters within the TRANSDUCER block.
• The read-only parameters report the block status and
operation modes.
• The read-write parameters affect the function block basic
operation, level transmitter operation, and calibration.
The Transducer Block remains in AUTO mode even when
the local interface (keypad) is used to change a parameter
online.
4.3.1 GWR Transducer Block Parameters
The first eight parameters in the GWR TRANSDUCER
block are the standard block parameters discussed in section
4.1.1. The standard parameters are followed by these addi-
tional required parameters for a Level Transducer Block:
Corresponding parameter names from Profile specification
are shown parenthetically if different from parameter names
used by Model 705.
LEVEL (PRIMARY_VALUE): The process value Level is
Probe Level + Level Offset and an associated status.
LEVEL_UNIT (PRIMARY_VALUE_UNIT): Unit of
measurement for level process variable (primary value).
PROBE_LEVEL (LEVEL): Level on the probe relative to
the end of the probe in Probe Level units.
PROBE_LEVEL_UNIT (LEVEL_UNIT): Unit of meas-
urement for probe level parameters: Level Offset, Probe
Level, Probe Level Hi, and Probe Level Lo.
SENSOR_VALUE: Sensor Value is the physical value of
the sensor (distance).
SENSOR_UNIT: Unit of measurement for sensor parameters.
SENSOR_OFFSET: Distance from the sensor reference
point to the top of the tank in sensor units.
CAL_TYPE: Defines type of calibration. Dry indicates that
sensor value has no influence on the level calibration.
SENSOR_CAL_LO (CAL_POINT_LO): Sensor Cal Lo
is the lower calibrated point of Sensor Value in sensor units.
It refers to Probe Level Lo.
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