705-5100-F21 datasheet(23/52 Pages) MAGNETROL

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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.

57-645 Eclipse Guided Wave Radar Transmitter - PROFIBUS PA™

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