Description Of The Blocks - Siemens SITRANS LR260 Operating Instructions Manual
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Also See for SITRANS LR260:
- Quick start manual (225 pages) ,
- Operating instructions manual (184 pages) ,
- Application manual (2 pages)
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Description of the blocks
Transducer block function groups
The figure below shows the signal flow of measured values from the sensor through the
Transducer block into the output value:
•
Primary Value (PV): Level
•
Secondary Value 1 (SV1): Level/Volume
•
Secondary Value 2 (SV2): Distance
The Level TB implements all of the basic parameters.
Level Transducer Block
Sensor Value
Sensor
Sensor
technology
Sensor
Offset
How the LTB works
1.
The sensor technology block selects the proper echo. For an explanation of sensor
technology, see
The sensor value (in sensor units) is checked to see if it is within its measuring limits.
If the limit is exceeded, this results in a Bad status and the error message Failure in
measurement. The sensor value is stored in Sensor Value.
The analog signal from the sensor is transformed into a digital signal.
A Sensor Offset (default 0) provides compensation if necessary for changes in the
sensor.
Page 116
SITRANS LR260 (PROFIBUS PA) – OPERATING INSTRUCTIONS
Level
Level
calibration
Level
Offset
Low
High
Calibration
Calibration
Point
Point
Low Level
High Level
Point
Point
Calibration
Type
Appendix D: Technical Reference
Primary Value
Level
(level units)
PV
Linearization
Linearization
Type
SV1
Secondary Value 1
[Level]
(Level Units)
SV2
Secondary Value 2
[Distance]
(Sensor Units)
, page 105 onwards.
AIFB1
(Analog
Input)
AIFB2
(Analog
Input)
A5E32337685
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