Siemens SITRANS LG270 Manuale utente
Operating Instructions • 03/2014
Guided Wave Radar
SITRANS LG270
Modbus and Levelmaster protocol
Rod and cable probe
2PBD-51041066SITRANS LG270 - Operating Instructions
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PBD-51041066 SITRANS LG270 - Operating Instructions
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Contents
1About this document
1.1 Function ........................................................................................................................... 5
1.2 Target group ..................................................................................................................... 5
1.3 Symbols used................................................................................................................... 5
2For your safety
2.1 Authorised personnel ....................................................................................................... 6
2.2 Appropriate use................................................................................................................ 6
2.3 Warning about incorrect use............................................................................................. 6
2.4 General safety instructions............................................................................................... 6
2.5 CE conformity................................................................................................................... 6
2.6 NAMUR recommendations .............................................................................................. 7
2.7 Environmental instructions ............................................................................................... 7
3Product description
3.1 Conguration.................................................................................................................... 8
3.2 Principle of operation........................................................................................................ 9
3.3 Packaging, transport and storage................................................................................... 12
3.4 Accessories and replacement parts ............................................................................... 12
4Mounting
4.1 General instructions ....................................................................................................... 14
4.2 Mounting instructions ..................................................................................................... 15
5 Connecting to power supply and bus system
5.1 Preparing the connection ............................................................................................... 23
5.2 Connecting..................................................................................................................... 24
5.3 Wiring plan ..................................................................................................................... 26
5.4 Double chamber housing with DIS-ADAPT .................................................................... 27
5.5 Supplementary electronics............................................................................................. 28
5.6 Switch-on phase............................................................................................................. 28
6 Set up the sensor with the display and adjustment module
6.1 Adjustment volume......................................................................................................... 29
6.2 Insert display and adjustment module............................................................................ 29
6.3 Adjustment system......................................................................................................... 30
6.4 Parameter adjustment - Quick setup .............................................................................. 31
6.5 Parameter adjustment - Extended adjustment................................................................ 33
6.6 Saving the parameter adjustment data........................................................................... 52
7 Setting up sensor and Modbus interface with PACTware
7.1 Connect the PC.............................................................................................................. 54
7.2 Parameter adjustment with PACTware............................................................................ 55
7.3 Set up with the quick setup............................................................................................. 56
7.4 Saving the parameter adjustment data........................................................................... 61
8 Diagnostics and service
8.1 Maintenance .................................................................................................................. 62
8.2 Diagnosis memory ......................................................................................................... 62
8.3 Status messages............................................................................................................ 63
8.4 Rectify faults................................................................................................................... 67
8.5 Exchanging the electronics module................................................................................ 69
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8.6 Exchange or shorten cable/rod ...................................................................................... 70
8.7 Software update ............................................................................................................. 72
8.8 How to proceed if a repair is needed.............................................................................. 72
9 Dismounting
9.1 Dismounting steps.......................................................................................................... 73
9.2 Disposal ......................................................................................................................... 73
10 Supplement
10.1 Technical data ................................................................................................................ 74
10.2 Basics Modbus............................................................................................................... 84
10.3 Modbus register ............................................................................................................. 86
10.4 Modbus RTU commands ............................................................................................... 88
10.5 Levelmaster commands ................................................................................................. 91
10.6 CongurationoftypicalModbushosts ........................................................................... 95
10.7 Dimensions .................................................................................................................. 100
Safety instructions for Ex areas
PleasenotetheEx-specicsafetyinformationforinstallationandop-
eration in Ex areas. These safety instructions are part of the operating
instructions manual and come with the Ex-approved instruments.
Editing status: 2014-03-17
5
PBD-51041066 SITRANS LG270 - Operating Instructions
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1About this document
1.1 Function
This operating instructions manual provides all the information you
need for mounting, connection and setup as well as important instruc-
tionsformaintenanceandfaultrectication.Pleasereadthisinforma-
tion before putting the instrument into operation and keep this manual
accessible in the immediate vicinity of the device.
1.2 Target group
This operating instructions manual is directed to trained specialist
personnel. The contents of this manual should be made available to
these personnel and put into practice by them.
1.3 Symbols used
Information, tip, note
This symbol indicates helpful additional information.
Caution: If this warning is ignored, faults or malfunctions can result.
Warning: If this warning is ignored, injury to persons and/or serious
damage to the instrument can result.
Danger: If this warning is ignored, serious injury to persons and/or
destruction of the instrument can result.
Ex applications
This symbol indicates special instructions for Ex applications.
•List
The dot set in front indicates a list with no implied sequence.
→ Action
This arrow indicates a single action.
1Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Battery disposal
This symbol indicates special information about the disposal of bat-
teries and accumulators.
6PBD-51041066SITRANS LG270 - Operating Instructions
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2For your safety
2.1 Authorised personnel
All operations described in this operating instructions manual must
be carried out only by trained specialist personnel authorised by the
plant operator.
During work on and with the device the required personal protective
equipment must always be worn.
2.2 Appropriate use
SITRANS LG270 is a sensor for continuous level measurement.
Youcannddetailedinformationabouttheareaofapplicationin
chapter "Product description".
Operational reliability is ensured only if the instrument is properly
usedaccordingtothespecicationsintheoperatinginstructions
manual as well as possible supplementary instructions.
2.3 Warning about incorrect use
Inappropriate or incorrect use of the instrument can give rise to
application-specichazards,e.g.vesseloverllordamagetosystem
components through incorrect mounting or adjustment.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and guidelines. The instrument must only be operated in a
technicallyawlessandreliablecondition.Theoperatorisresponsible
for the trouble-free operation of the instrument.
During the entire duration of use, the user is obliged to determine the
compliance of the necessary occupational safety measures with the
current valid rules and regulations and also take note of new regula-
tions.
The safety instructions in this operating instructions manual, the na-
tional installation standards as well as the valid safety regulations and
accident prevention rules must be observed by the user.
For safety and warranty reasons, any invasive work on the device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbi-
traryconversionsormodicationsareexplicitlyforbidden.
The safety approval markings and safety tips on the device must also
be observed.
2.5 CE conformity
ThedevicefulllsthelegalrequirementsoftheapplicableECguide-
lines.ByaxingtheCEmarking,weconrmsuccessfultestingofthe
product.
YoucanndtheCECerticateofConformityinthedownloadsection
of our homepage.
7PBD-51041066 SITRANS LG270 - Operating Instructions
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Electromagnetic compatibility
Instruments in four-wire or Ex-d-ia version are designed for use in an
industrial environment. Nevertheless, electromagnetic interference
from electrical conductors and radiated emissions must be taken into
account, as is usual with class A instruments according to EN 61326-
1.Iftheinstrumentisusedinadierentenvironment,theelectromag-
netic compatibility to other instruments must be ensured by suitable
measures.
2.6 NAMUR recommendations
NAMUR is the automation technology user association in the process
industry in Germany. The published NAMUR recommendations are
acceptedasthestandardineldinstrumentation.
ThedevicefulllstherequirementsofthefollowingNAMURrecom-
mendations:
•NE 21 – Electromagnetic compatibility of equipment
•NE 43 – Signal level for malfunction information from measuring
transducers
•NE53–Compatibilityofelddevicesanddisplay/adjustment
components
•NE107–Self-monitoringanddiagnosisofelddevices
For further information see www.namur.de.
2.7 Environmental instructions
Protection of the environment is one of our most important duties.
That is why we have introduced an environment management system
with the goal of continuously improving company environmental pro-
tection.Theenvironmentmanagementsystemiscertiedaccording
to DIN EN ISO 14001.
Pleasehelpusfulllthisobligationbyobservingtheenvironmental
instructions in this manual:
•Chapter "Packaging, transport and storage"
•Chapter "Disposal"
8PBD-51041066SITRANS LG270 - Operating Instructions
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3Product description
3.1 Conguration
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
2
1
5
3
6
4
7
8
11
12
13
10
9
1
Fig. 1: Layout of the type label (example)
1 Instrument type
2 Product code
3 Process and ambient temperature, process pressure
4 Process pressure
5 Signal output electronics
6 Voltage supply
7 Protection rating
8 Order number
9 Identicationcode
10 Serial number of the instrument
11 Symbol of the device protection class
12 Reminder to observe the instrument documentation
13 ID numbers, instrument documentation
Theinstrumentcontainstwodierentelectronicsinitshousingcham-
bers:
•The Modbus electronics for power supply and communication with
the Modbus-RTU
•The sensor electronics for the actual measuring tasks
2
1
Fig. 2: Position of Modbus and sensor electronics
1 Modbus electronics
2 Sensor electronics
Type label
Electronics design
9PBD-51041066 SITRANS LG270 - Operating Instructions
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This operating instructions manual applies to the following instrument
versions:
•Hardware from 1.0.0
•Software from 1.0.0
•OnlyforinstrumentversionswithoutSILqualication
This electronics version can be determined via the product code on
the type label as well as on the electronics.
•Standard electronics: Type FX80HK.-
The scope of delivery encompasses:
•Sensor
•Documentation
– this operating instructions manual
– Testcerticatemeasuringaccuracy(optional)
– Operating instructions manual "Display and adjustment mod-
ule"(optional)
– Supplementary instructions manual "Plug connector for con-
tinuously measuring sensors"(optional)
– Ex-specic"Safety instructions"(withExversions)
– ifnecessary,furthercerticates
3.2 Principle of operation
The SITRANS LG270 is a level sensor with cable or rod probe for
continuous level or interface measurement, particularly suitable for
applicationsinhightemperaturesupto+450°C(842°F).
High frequency microwave pulses are guided along a steel cable or
a rod. Upon reaching the product surface, the microwave pulses are
reected.Therunningtimeisevaluatedbytheinstrumentandoutput-
ted as level.
Scope of this operating
instructions manual
Versions
Scope of delivery
Application area
Functional principle -
level measurement
10 PBD-51041066SITRANS LG270 - Operating Instructions
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d
h
1
Fig. 3: Level measurement
1 Sensorreferenceplane(sealsurfaceoftheprocesstting)
d Distance to the interface (HART value 1)
h Height - Level
Probe end tracking
To increase sensitivity, the probe is equipped with probe end tracking.
In products with a low dielectric constant, this function is very helpful.
This is the case, for example, in plastic granules, packing chips or in
vesselswithuidizedproducts.
Between a dielectric constant of 1.5 and 3, the function switches on, if
required. As soon as the level echo can no longer be detected, probe
end tracking is automatically activated. The measurement is contin-
ued with the last calculated dielectric constant.
The accuracy thus depends on the stability of the dielectric constant.
If you measure a medium with a dielectric constant below 1.5, probe
end tracking is always active. In this case, you have to enter the
dielectric constant of the medium. A stable dielectric constant is very
important here.
High frequency microwave impulses are guided along a steel cable or
rod. Upon reaching the product surface, a part of the microwave im-
pulsesisreected.Theotherpartpassesthroughtheupperproduct
andisreectedbytheinterface.Therunningtimestothetwoproduct
layers are processed by the instrument.
Functional principle - in-
terface measurement
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