User's Manual
Table Of Contents
- Table of Contents
- SITRANS LR260 Overview
- Specifications
- Installation
- Wiring
- Quick Start via local operation
- Operating via SIMATIC PDM
- Parameter Reference
- Pull-down menus via SIMATIC PDM
- Quick Start Wizard
- 1. Quick Start
- 2. Setup
- 2.1. Device
- 2.2. Input
- 2.2.1. Sensor Calibration (SENSOR CALIB.)
- 2.2.1.1. Antenna
- 2.2.1.2. Sensor Units
- 2.2.1.3. Low Calibration Pt. (LOW CALIB. PT.)
- 2.2.1.4. High Calibration Pt. (HIGH CALIB. PT.)
- 2.2.1.5. Limit Sensor Value
- 2.2.1.6. Unit (Level)
- 2.2.1.7. Low Level Point
- 2.2.1.8. High Level Point
- 2.2.1.9. Level Offset
- 2.2.1.10. Sensor Offset
- 2.2.1.11. Temperature Units (TEMP UNITS)
- 2.2.3. Echo Processing (ECHO PROC)
- 2.2.4. TVT (Auto False Echo Suppression) setup
- 2.2.5. TVT Shaper
- 2.2.6. Rate
- 2.2.7. Transducer Block Values (for diagnostic purposes)
- 2.2.1. Sensor Calibration (SENSOR CALIB.)
- 2.3. Output
- 2.4. Fail-safe
- 3. Diagnostics
- 3.1. Fault Reset
- 3.2. Echo Profile
- 3.3. Measured Values (MEAS. VALUES)
- 3.3.1. Min. Measured Value (MIN. MEAS. VALUE)
- 3.3.2. Max. Measured Value (MAX. MEAS. VALUE)
- 3.3.3. Minimum Output Value - AIFB1 (MIN. OUTPUT FB1)
- 3.3.4. Maximum Output Value - AIFB1 (MAX. OUTPUT FB1)
- 3.3.5. Minimum Output Value - AIFB2 (MIN. OUTPUT FB2)
- 3.3.6. Maximum Output Value - AIFB2 (MAX. OUTPUT FB2)
- 3.3.7. Minimum Internal Temperature (MIN. INTERN. TEMP)
- 3.3.8. Maximum Internal Temperature (MAX. INTERN. TEMP)
- 3.4. Remaining Device Lifetime (REMAIN. DEV. LIFE)
- 3.4.1. Total Device Operating Time (TOTAL OP. TIME)
- 3.4.2. Remaining Device Lifetime (REMAIN LIFETIME)
- 3.4.3. Maintenance Required Limit (MAINT REQ LIMIT)
- 3.4.4. Maintenance Demanded Limit (MAINT DEM LIMIT)
- 3.4.5. Maintenance Alert Activation (ALERT ACTIVATION)
- 3.4.6. Total Expected Device Life (TOTAL EXP. LIFE)
- 3.4.7. Maintenance Status (MAINT STAT)
- 3.4.8. Acknowledge Status (ACK STATUS)
- 3.4.9. Acknowledge (ACK)
- 3.5. Remaining Sensor Lifetime (REMAIN SENS. LIFE)
- 3.5.1. Total Sensor Operating Time (SENS OP. TIME)
- 3.5.2. Remaining Sensor Lifetime (REMAIN LIFETIME)
- 3.5.3. Maintenance Required Limit (MAINT REQ LIMIT)
- 3.5.4. Maintenance Demanded Limit (MAINT. DEM. LIMIT)
- 3.5.5. Maintenance Alert Activation (ALERT ACTIVATION)
- 3.5.6. Total Expected Sensor Life (TOTAL EXP. LIFE)
- 3.5.7. Maintenance Status (MAINT STAT)
- 3.5.8. Acknowledge Status (ACK STATUS)
- 3.5.9. Acknowledge (ACK)
- 3.6. Condensed Status Setup (COND. STAT. SETUP)
- 3.7. Condensed Status
- 4. Service
- 4.1. Device Reset
- 4.2. LCD Fast Mode
- 4.3. LCD Contrast
- 4.4. PROFIBUS Ident Number (PROFIBUS IDENT)
- 4.5. Powered Hours
- 4.6. Power-on Resets
- 4.17. Service Interval
- 4.17.1. Time Last Serviced (TIME LAST SERV)
- 4.17.2. Remaining Lifetime (REMAIN LIFETIME)
- 4.17.3. Maintenance Required Limit (MAINT REQ LIMIT)
- 4.17.4. Maintenance Demanded Limit (MAINT DEM. LIMIT)
- 4.17.5. Alert Activation
- 4.17.6. Service Interval
- 4.17.7. Maintenance Status (MAINT STAT)
- 4.17.8. Acknowledge Status (ACK STATUS)
- 4.17.9. Acknowledge (ACK)
- 4.18. Calibration Interval (CALIB INTERVAL)
- 4.18.1. Time Last Calibrated (TIME LAST CAL.)
- 4.18.2. Remaining Lifetime (REMAIN LIFETIME)
- 4.18.3. Maintenance Required Limit (MAINT REQ LIMIT)
- 4.18.4. Maintenance Demanded Limit (MAINT DEM LIMIT)
- 4.18.5. Alert Activation
- 4.18.6. Total Calibration Interval (TOTAL CALIB. INTRV)
- 4.18.7. Maintenance Status (MAINT STAT)
- 4.18.8. Acknowledge Status (ACK STAT)
- 4.18.9. Acknowledge (ACK)
- 5. Communication
- 6. Security
- 7. Language
- Appendix A: Alphabetical Parameter List
- Appendix B: Troubleshooting
- Appendix C: Maintenance
- Appendix D: Technical Reference
- Appendix E: Application Example
- Appendix F: PROFIBUS PA Profile Structure
- Appendix G: Communications via PROFIBUS PA
- Appendix H: Firmware Revision History
- Glossary
- Index
- LCD menu structure
Page 106 SITRANS LR260 (PROFIBUS PA)– OPERATING INSTRUCTIONS A5E32337685
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D: Technical Reference
Far Range
In applications where the base of the vessel is conical or parabolic, a reliable echo may
be available below the vessel empty distance, due to an indirect reflection path.
Increasing the range extension to 30% or 40% can provide stable empty vessel readings.
Measurement Response
The measurement response (Response Rate (1.2.)) limits the maximum rate at which the
display and output respond to changes in the measurement. Once the real process fill/
empty rate (m/s) is established, a response rate can be selected that is slightly higher
than the application rate. The response rate automatically adjusts the filters that affect
the output response rate.
There are three preset options: slow, medium, and fast.
Damping
A damping filter smooths out the response to a sudden change in level. This is an
exponential filter and the engineering unit is always in seconds. The setting can be
modified in Filter Time Constant (FILTER TIME CONST) (2.3.1.4.).
Loss of Echo (LOE)
A loss of echo (LOE) occurs when the calculated measurement is judged to be unreliable
because the echo confidence value has dropped below the echo confidence threshold.
Response
Rate (1.2.)
Fill Rate (FILL RATE/
MIN) (2.2.6.2.)/
Empty rate (EMPTY
RATE/MIN) (2.2.6.3.)
Filter Time
Constant (FILTER
TIME CONST)
(2.3.1.4.)
a)
a)
Numbering depends on AIFB selected.
Shots (2.2.3.3.1.)
Slow 0.1 m/min 60 s 25
Medium 1 m/min 10 s 10
Fast * 10 m/min 0 s 10
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
1234567
Series1 Series2
Level (m)
Time (s)
smoothed output
input (level)
Damping example
time constant = 2 seconds
input (level) change = 2 m
In 5 time constants the output rises
exponentially:
from 63.2% of the change in the
first time constant, to almost 100%
of the change by the end of the 5th
time constant.