VEGA FLEX86 User Manual
Operating Instructions
TDR sensor for continuous level and
interface measurement of liquids
VEGAFLEX 86
Modbus and Levelmaster protocol
Coax probe
Document ID: 42288
Quick start
Mounting
Electrical connection
Quick start
The quick start procedure enables a quick setup with many applica-
tions. You can nd further information in the respective chapters of the
operating instructions manual.
Distance from the metallic vessel wall > 300 mm. Distance from
→
non-metallic vessel wall > 500 mm. The probe must not touch any
installations or the vessel wall.
For further information see chapter "Mounting".
1. Make sure that the power supply corresponds to the specica-
tions on the type label.
2. Connect the instrument according to the following illustration
1
USB
MODBUS
)
+
(
power supply
(-)
( )
1345
2off
+
Fig. 1: Connection compartment
1 USB connection
2 Slideswitchforintegratedterminationresistor(120Ω)
For further information see chapter "Connecting to power supply".
(-)
IS GND
D0
D1
2
on
Set parameters
2
For standard applications we recommend selecting the "Quick setup"
in the display and adjustment module.
1. In this menu item you can select the application. You can choose
between level and interface measurement.
2. In the menu item "Medium - Dielectric constant" you can dene
the medium type (medium).
3. Carry out the adjustment in the menu items "Min. adjustment" and
"Max. adjustment".
42288-EN-130314
4. A "Linearization" is required for all vessels in which the vessel volume does not increase linearly with the level - e.g. in a horizontal
cylindrical or spherical tank. Activate the appropriate curve.
VEGAFLEX 86 • Modbus and Levelmaster protocol
Quick start
5. A "False signal suppression" detects, marks and saves the false
signals so that they are no longer taken into account for level
measurement. We generally recommend a false signal suppres-
sion.
Parameterization example
F
urther steps
The sensor measures the distance from the sensor (reference plane)
to the product surface.
1
4
2
Fig. 2: Measuring ranges - VEGAFLEX 86
1 Reference plane
2 Probe length L
3 Measuringrange(defaultsettingreferstothemeasuringrangeinwater)
4 Upperdeadband(inthisareanomeasurementispossible)
5 Lowerdeadband(inthisareanomeasurementispossible)
3
5
For this adjustment, the distance is entered when the vessel is full
and nearly empty. If these values are not known, an adjustment with
other distances, for example, 10 % and 90 % is also possible. Starting
point for these distance specications is always the seal surface of
the thread or ange.
1. In the menu "Additional settings", menu item "Damping" you can
adjust the requested damping of the output signal.
2. Select the parameter of the current output and the output characteristics in the menu item "Current output".
You can nd additional information in chapter "Parameter adjustment".
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VEGAFLEX 86 • Modbus and Levelmaster protocol
3
Contents
Contents
1 About this document
1.1 Function ............................................................................. 6
1.2 Target group ....................................................................... 6
1.3 Symbolism used ................................................................. 6
2 For your safety
2.1 Authorised personnel ......................................................... 7
2.2 Appropriate use .................................................................. 7
2.3 Warning about incorrect use ............................................... 7
2.4 General safety instructions ................................................. 7
2.5 CE conformity ..................................................................... 7
2.6 NAMUR recommendations ................................................ 8
2.7 Environmental instructions ................................................. 8
3 Product description
3.1 Conguration ...................................................................... 9
3.2 Principle of operation ........................................................ 10
3.3 Packaging, transport and storage ..................................... 13
3.4 Accessories and replacement parts ................................. 13
4 Mounting
4.1 General instructions ......................................................... 15
4.2 Instructions for installation ................................................ 15
5 Connecting to power supply and bus system
5.1 Preparing the connection ................................................. 19
5.2 Connection ....................................................................... 20
5.3 Wiring plan ....................................................................... 21
5.4 Switch-on phase ............................................................... 22
6 Set up with the display and adjustment module
6.1 Adjustment volume ........................................................... 23
6.2 Insert display and adjustment module .............................. 23
6.3 Adjustment system ........................................................... 24
6.4 Parameter adjustment - Quick setup ................................ 25
6.5 Parameter adjustment - Extended adjustment .................. 27
6.6 Saving the parameter adjustment data ............................. 43
7 Setting up sensor and Modbus interface with PACTware
7.1 Connect the PC ................................................................ 45
7.2 Parameter adjustment with PACTware .............................. 46
7.3 Set up with the quick setup ............................................... 47
7.4 Saving the parameter adjustment data ............................. 52
8 Set up with other systems
8.1 DD adjustment programs ................................................. 53
8.2 Communicator 375, 475 ................................................... 53
9 Diagnostics and service
9.1 Maintenance .................................................................... 54
9.2 Diagnosis memory ........................................................... 54
9.3 Status messages .............................................................. 55
9.4 Rectify faults ..................................................................... 59
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4
VEGAFLEX 86 • Modbus and Levelmaster protocol
9.5 Exchanging the electronics module .................................. 61
9.6 Software update ............................................................... 62
9.7 How to proceed in case of repair ...................................... 62
10 Dismounting
10.1 Dismounting steps ............................................................ 63
10.2 Disposal ........................................................................... 63
11 Supplement
11.1 Technical data .................................................................. 64
11.2 Basics Modbus ................................................................. 71
11.3 Modbus register ............................................................... 72
11.4 Modbus RTU commands ................................................. 75
11.5 Levelmaster commands ................................................... 78
11.6 Conguration of typical Modbus hosts.............................. 81
11.7 Dimensions ...................................................................... 85
Contents
Safety instructions for Ex areas
Please note the Ex-specic safety information for installation and operation in Ex areas. These safety instructions are part of the operating
instructions manual and come with the Ex-approved instruments.
42288-EN-130314
Editing status: 2013-03-11
VEGAFLEX 86 • Modbus and Levelmaster protocol
5
1 About this document
1 About this document
1.1 Function
This operating instructions manual provides all the information you
need for mounting, connection and setup as well as important instructions for maintenance and fault rectication. Please read this information 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 Symbolism 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.
1 Sequence
Numbers set in front indicate successive steps in a procedure.
Battery disposal
This symbol indicates special information about the disposal of batteries and accumulators.
42288-EN-130314
6
VEGAFLEX 86 • Modbus and Levelmaster protocol
2 For your safety
2 For 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
VEGAFLEX 86 is a sensor for continuous level measurement.
You can nd detailed information on the application range in chapter
"Product description".
Operational reliability is ensured only if the instrument is properly
used according to the specications in the operating instructions
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-specic hazards, e.g. vessel overll or damage to system
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
technically awless and reliable condition. The operator is responsible
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 national 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. Arbitrary conversions or modications are explicitly forbidden.
The safety approval markings and safety tips on the device must also
be observed.
2.5 CE conformity
The device fullls the legal requirements of the applicable EC guidelines. By axing the CE marking, we conrm successful testing of the
product.
You can nd the conformity certicate in the download section of our
homepage.
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
7
2 For your safety
Electromagnetic compatibility
Instruments with plastic housing as well as 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 a
class A instrument according to EN 61326-1. If the instrument is used
in a dierent environment, the electromagnetic 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
accepted as the standard in eld instrumentation.
The device fullls the requirements of the following NAMUR recom-
mendations:
NE 21 – Electromagnetic compatibility of equipment
•
NE 43 – Signal level for malfunction information from measuring
•
transducers
NE 53 – Compatibility of eld devices and display/adjustment
•
components
NE 107 – Self-monitoring and diagnosis of eld devices
•
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 protection. The environment management system is certied according
to DIN EN ISO 14001.
Please help us fulll this obligation by observing the environmental
instructions in this manual:
Chapter "Packaging, transport and storage"
•
Chapter "Disposal"
•
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8
VEGAFLEX 86 • Modbus and Levelmaster protocol
Type plate
3 Product description
3 Product description
3.1 Conguration
The nameplate contains the most important data for identication and
use of the instrument:
1
2
3
4
5
6
7
8
9
10
Fig.3:Layoutofthetypelabel(example)
1 Instrument type
2 Product code
3 Approvals
4 Power supply and signal output, electronics
5 Protection rating
6 Probe length
7 Process and ambient temperature, process pressure
8 Material, wetted parts
9 Hardware and software version
10 Order number
11 Serial number of the instrument
12 Symbol of the device protection class
13 ID numbers, instrument documentation
14 Note to observe the instrument documentation
15 NotiedauthorityforCEmarking
16 Approval directive
16
15
14
13
12
11
Serial number
Electronics design
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
With the serial number of the instrument on the type label you have
access to the following data on our homepage:
Article number of the instrument (HTML)
•
Delivery date (HTML)
•
Order-specic instrument features (HTML)
•
Operating instructions at the time of shipment (PDF)
•
Order-specic sensor data for an electronics exchange (XML)
•
Test certicate "Measuring Accuracy" (PDF)
•
For this purpose, move to www.vega.com and "VEGA Tools".
The instrument contains two dierent electronics in its housing cham-
bers:
The Modbus electronics for power supply and communication with
•
the Modbus-RTU
The sensor electronics for the actual measuring tasks
•
9
3 Product description
Scope of this operating
instructions manual
Versions
Scope of deliver
y
1
Fig. 4: Position of Modbus and sensor electronics
1 Modbus electronics
2 Sensor electronics
This operating instructions manual applies to the following instrument
versions:
Hardware from 1.0.0
•
Software from 1.0.0
•
Only for instrument versions without SIL qualication
•
The respective 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
– Test certicate measuring accuracy (optional)
– Operating instructions manual "Display and adjustment mod-
ule" (optional)
– Supplementary instructions "GSM/GPRS radio module"
(optional)
– Supplementary instructions manual "Heating for display and
adjustment module" (optional)
– Supplementary instructions manual "Plug connector for con-
tinuously measuring sensors" (optional)
– Ex-specic "Safety instructions" (with Ex versions)
– if necessary, further certicates
2
Application area
Functional principle level measurement
10
3.2 Principle of operation
The VEGAFLEX 86 is a level sensor with coax probe for continuous
level or interface measurement, suitable for applications in liquids
with high temperatures up to 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. The running time is evaluated by the instrument and output-
ted as level.
VEGAFLEX 86 • Modbus and Levelmaster protocol
42288-EN-130314
3 Product description
1
d
h
Fig. 5: Level measurement
1 Sensorreferenceplane(sealsurfaceoftheprocesstting)
d Distancetotheinterface(HARTvalue1)
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
uidized vessels.
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 continued 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.
Functional principle - inter
face measur
ement
High frequency microwave impulses are guided along a steel cable or
rod. Upon reaching the product surface, a part of the microwave impulses is reected. The other part passes through the upper product
and is reected by the interface. The running times to the two product
layers are processed by the instrument.
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VEGAFLEX 86 • Modbus and Levelmaster protocol
11
3 Product description
L3
L2
1
d2
d1
TS
Prerequisites for interface measurement
h2
h1
Fig. 6: Interface measurement
1 Sensorreferenceplane(sealsurfaceoftheprocesstting)
d1 Distancetotheinterface(HARTvalue1)
d2 Distancetothelevel(HARTvalue3)
TSThicknessoftheuppermedium(d1-d2)
h1 Height - Interface
h2 Height - Level
L1 Lower medium
L2 Upper medium
L3 Gas phase
Upper medium (L2)
The upper medium must not be conductive
•
The dielectric constant of the upper medium must be known (input
•
required). Min. dielectric constant: rod version 1.6. You can nd a
list of dielectric constants on our home page: www.vega.com
The composition of the upper medium must be stable, no varying
•
products or mixtures
The upper medium must be homogeneous, no stratications
•
within the medium
Min. thickness of the upper medium 50 mm (1.97 in)
•
Clear separation from the lower medium, no emulsion phase, no
•
mull layer
If possible, no foam on the surface
•
L1
Output signal
12
Lower medium (L1)
The dielectric constant must be 10 higher than the dielectric
•
constant of the upper medium, preferably electrically conductive.
Example: upper medium dielectric constant 2, lower medium at
least dielectric constant 12.
Gas phase (L3)
Air or gas mixture
•
Gas phase - dependent on the application, gas pahse does not
•
always exist (d2 = 0)
The instrument is always preset to the application "Level measure-
ment".
VEGAFLEX 86 • Modbus and Levelmaster protocol
42288-EN-130314
Packaging
T
ranspor
3 Product description
For the interface measurement, you can select the requested output
signal with the setup.
3.3 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE
foil is also used. Dispose of the packaging material via specialised
recycling companies.
t
Transport must be carried out under consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
Transport inspection
Storage
Storage and transport
temperature
Display and adjustment
module
Interface adapter
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
Not in the open
•
Dry and dust free
•
Not exposed to corrosive media
•
Protected against solar radiation
•
Avoiding mechanical shock and vibration
•
Storage and transport temperature see chapter "Supplement -
•
Technical data - Ambient conditions"
Relative humidity 20 … 85 %
•
3.4 Accessories and replacement parts
The display and adjustment module PLICSCOM is used for measured
value indication, adjustment and diagnosis. It can be inserted into the
sensor or the external display and adjustment unit and removed at
any time.
You can nd further information in the operating instructions "Display
and adjustment module PLICSCOM" (Document-ID 27835).
The interface adapter VEGACONNECT enables the connection of
communication-capable instruments to the USB interface of a PC. For
parameter adjustment of these instruments, an adjustment software
such as PACTware with VEGA-DTM is required.
You can nd further information in the operating instructions "Interface
adapter VEGACONNECT" (Document-ID 32628).
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VEGAFLEX 86 • Modbus and Levelmaster protocol
13
3 Product description
External display and
adjustment unit
External display and adjustment unit with HAR
protocol
External radio unit
Protective cover
Flanges
VEGADIS 61 is an external display and adjustment unit for sensors
with single chamber housing and Ex-d double chamber housing.
It is suitable for measured value indication and adjustment of plics
sensors and is connected to the sensor with a four-wire standard
cable up to 50 m (164 ft) long.
You can nd further information in the operating instructions "VE-
GADIS 61" (Document-ID 27720).
VEGADIS 62 is suitable for measured value indication and adjustment
T
of sensors with HART protocol. It is looped into the 4 … 20 mA/HART
signal cable.
You can nd further information in the operating instructions "VEGADIS 62" (Document-ID 36469).
The PLICSMOBILE T61 is an external GSM/GPRS radio unit for
transmission of measured values and for remote parameter adjustment of plics
®
sensors. The adjustment is carried out via PACTware/
DTM by using the integrated USB connection.
You can nd further information in the supplementary instructions
"PLICSMOBILE T61" (Document-ID 36849).
The protective cover protects the sensor housing against soiling and
intense heat from solar radiation.
You will nd additional information in the supplementary instructions
manual "Protective cover" (Document-ID 34296).
Screwed anges are available in dierent versions according to the
following standards: DIN 2501, EN 1092-1, ANSI B 16.5, JIS B 22101984, GOST 12821-80.
You can nd additional information in the supplementary instructions
manual "Flanges according to DIN-EN-ASME-JIS" (Document-ID
31088).
®
Electronics module
Electronics module,
Modbus
Display and adjustment
module with heating
14
The electronics module VEGAFLEX series 80 is a replacement part
for TDR sensors of VEGAFLEX series 80. There is a dierent version
available for each type of signal output.
You can nd further information in the operating instructions manual
"Electronics module VEGAFLEX series 80".
The electronics module Modbus is a replacement part for TDR sensors of VEGAFLEX series 80.
You can nd further information in the operating instructions manual
"Electronics module Modbus VEGAFLEX series 80".
The display and adjustment module can be optionally replaced by a
display and adjustment module with heating function.
You can hence use the display and adjustment module in an ambient
temperature range of -40 … 70 °C.
You can nd further information in the operating instructions "Display
and adjustment module with heating" (Document-ID 31708).
VEGAFLEX 86 • Modbus and Levelmaster protocol
42288-EN-130314
Screwing in
4 Mounting
4 Mounting
4.1 General instructions
With instruments with threaded process tting, suitable tools must be
applied for tightening the hexagon.
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Moisture
Protective caps
Suitability for the process
conditions
Installation position
Use the recommended cables (see chapter "Connecting to power
supply") and tighten the cable gland.
You can give your instrument additional protection against moisture
penetration by leading the connection cable downward in front of the
cable entry. Rain and condensation water can thus drain o. This ap-
plies mainly to:
outdoor mounting
•
installations in areas where high humidity is expected (e.g. through
•
cleaning processes)
installations on cooled or heated vessels
•
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
openings for the cable glands are therefore covered with red protec-
tive caps as transport protection.
Prior to setup you have to replace these protective caps with approved cable glands or close the openings with suitable blind plugs.
The suitable cable glands and blind plugs come with the instrument.
Make sure that all parts of the instrument exposed to the process, in
particular the active measuring component, process seal and process
tting, are suitable for the existing process conditions. These include
above all the process pressure, process temperature as well as the
chemical properties of the medium.
You can nd the specications in chapter "Technical data" and on the
nameplate.
4.2 Instructions for installation
Mount VEGAFLEX 86 in such a way that the distance to vessel installations or to the vessel wall is at least 300 mm (12 in). In non-metallic
vessels, the distance to the vessel wall should be at least 500 mm
(19.7 in).
During operation, the probe must not touch any installations or the
vessel wall. If necessary, fasten the probe end.
In vessels with conical bottom it can be advantageous to mount the
sensor in the center of the vessel, as measurement is then possible
nearly down to the lowest point of the bottom. Keep in mind that
measurement all the way down to the tip of the probe may not be pos-
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
15
4 Mounting
sible. The exact value of the min. distance (lower dead band) is stated
in chapter "Technical data".
Fig. 7: Vessel with conical bottom
Welding work
Inowingmedium
Measuring range
Before beginning the welding work, remove the electronics module
from the sensor. By doing this, you avoid damage to the electronics
through inductive coupling.
Do not mount the instruments in or above the lling stream. Make sure
that you detect the product surface, not the inowing product.
Fig.8:Mountingofthesensorwithinowingmedium
42288-EN-130314
The reference plane for the measuring range of the sensors is the
sealing surface of the thread or ange.
Keep in mind that a min. distance must be maintained below the reference plane and possibly also at the end of the probe - measurement
in these areas is not possible (dead band). These dead bands are
16
VEGAFLEX 86 • Modbus and Levelmaster protocol
4 Mounting
listed in chapter "Technical data". Keep in mind for the adjustment that
the default setting for the measuring range refers to water.
Pressure
Mounting in the vessel
insulation
The process tting must be sealed if there is gauge or low pressure in
the vessel. Before use, check if the seal material is resistant against
the measured product and the process temperature.
The max. permissible pressure is specied in chapter "Technical
data" or on the type label of the sensor.
Instruments for a temperature range up to 280 °C or up to 450 °C
have a distance piece between process tting and electronics housing. Ths distance piece is used for thermal decoupling of the electron-
ics against high process temperatures.
Information:
The distance piece must only be incorporated up to max. 50 mm (2 in)
in the vessel isolation. Only then, a reliable temperature decoupling is
guaranteed.
2
1
Fig. 9: Mounting of the instrument on insulated vessels.
1 Temperature insulation
2 Ambient temperature on the housing
Steam boiler applications
Vapours, superimposed gases, high pressures and temperature differences can change the spreading speed of radar impulses.
There are two possibilities to correct these deviations.
Corrective value in the process control system
In the technical data under "Inuence of superimposed gas and pressure on accuracy" you can nd a table with deviation values in some
typical gases or in steam.
In the control system (DCS) you can correct the measurement results
of the VEGAFLEX 86 with these values.
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VEGAFLEX 86 • Modbus and Levelmaster protocol
17
4 Mounting
The prerequisite is constant temperature and pressure in the vessel.
Automatic correction via the reference distance
The VEGAFLEX 86 can be equipped optionally with a running time
correction via reference distance. The probe can carry out an automatic running time correction with it.
The reference point must hence not be overlled. The upper dead
band is hence 450 mm (17.7 in).
1
7
2
Fig. 10: Measuring ranges - VEGAFLEX 86 with steam compensation
1 Reference plane
2 Probe length L
3 Measuring range
4 Upper dead band
5 Lower dead band
6 Additional upper dead band by steam compensation
7 Reference measurement distance to steam compensation
6
4
3
5
18
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
Safety instructions
5 Connecting to power supply and bus system
5 Connecting to power supply and bus
system
5.1 Preparing the connection
Always keep in mind the following safety instructions:
Connect only in the complete absence of line voltage
•
If overvoltage surges are expected, overvoltage arresters should
•
be installed
Voltage supply
Connection cable
Cable gland ½ NPT
Cable screening and
grounding
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
The instrument requires an operating voltage of 8 … 30 V DC. Operating voltage and digital bus signal are carried on separate two-wire
connection cables.
The instrument is connected with standard two-wire, twisted cable
suitable for RS 485. If electromagnetic interference is expected which
is above the test values of EN 61326 for industrial areas, screened
cable should be used.
For instruments with housing and cable gland, use cable with round
cross-section. To ensure the seal eect of the cable gland (IP protection rating), you have to check for which cable outer diameter the
cable gland is suitable.
5 … 9 mm (0.20 … 0.35 in)
•
6 … 12 mm (0.24 … 0.47 in)
•
10 … 14 mm (0.40 … 0.55 in)
•
Use a cable gland tting the cable diameter.
Make sure that the entire installation is carried out according to the
Fieldbus specication. In particular, make sure that the bus is terminated with suitable terminating resistors.
With plastic housing, the NPT cable gland or the Conduit steel tube
must be screwed without grease into the threaded insert.
Max. torque for all housings see chapter "Technical data".
With systems with potential equalisation, connect the cable screen
directly to ground potential at the power supply unit, in the connection
box and at the sensor. The screen in the sensor must be connected
directly to the internal ground terminal. The ground terminal outside
on the housing must be connected to the potential equalisation (low
impedance).
In systems without potential equalisation, connect the cable screen
directly to ground potential at the power supply unit and at the sensor.
In the connection box or T-distributor, the screen of the short stub to
the sensor must not be connected to ground potential or to another
cable screen. The cable screens to the power supply unit and to the
next distributor must be connected to each other and also connected
to ground potential via a ceramic capacitor (e.g. 1 nF, 1500 V). The
low frequency potential equalisation currents are thus suppressed,
but the protective eect against high frequency interference signals
remains.
19
5 Connecting to power supply and bus system
5.2 Connection
Connection technology
The voltage supply and signal output are connected via the springloaded terminals in the housing.
The connection to the display and adjustment module or to the inter-
face adapter is carried out via contact pins in the housing.
Information:
The terminal block is pluggable and can be removed from the electronics. To do this, lift the terminal block with a small screwdriver and
pull it out. When inserting the terminal block again, you should hear it
snap in.
Connection procedure
Proceed as follows:
1. Unscrew the housing cover
2. If a display and adjustment module is installed, remove it by turning it slightly to the left.
3. Loosen compression nut of the cable entry
4. Remove approx. 10 cm (4 in) of the cable mantle, strip approx.
1 cm (0.4 in) of insulation from the ends of the individual wires
5. Insert the cable into the sensor through the cable entry
Fig. 11: Connection steps 5 and 6
6. Insert the wire ends into the terminals according to the wiring plan
Information:
Solid cores as well as exible cores with wire end sleeves are
inserted directly into the terminal openings. In case of exible cores
without end sleeves, press the terminal head with a small screwdriver;
the terminal opening is freed. When the screwdriver is released, the
terminal closes again.
You can nd further information on the max. wire cross-section under
"Technical data/Electromechanical data"
7. Check the hold of the wires in the terminals by lightly pulling on
them
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20
VEGAFLEX 86 • Modbus and Levelmaster protocol
Overview
5 Connecting to power supply and bus system
8. Connect the screen to the internal ground terminal, connect the
outer ground terminal to potential equalisation
9. Tighten the compression nut of the cable entry. The seal ring must
completely encircle the cable
10. Place probably existing display and adjustment module back on
11. Screw the housing cover back on
The electrical connection is hence nished.
5.3 Wiring plan
Electronics compartment
1
Fig.12:Positionofconnectioncompartment(Modbuselectronics)andelectronicscompartment(sensorelectronics)
1 Connection compartment
2 Electronics compartment
2
2
4...20mA
+
( )
(-)
1
2
567
8
11
Fig. 13: Electronics compartment, double chamber housing
1 Internal connection to the connection compartment
2 For display and adjustment module or interface adapter
Information:
The connection of an external display and adjustment unit is not possible with this double chamber housing.
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
21
5 Connecting to power supply and bus system
Connection compartment
1
USB
MODBUS
)
+
(
power supply
(-)
IS GND
D0
D1
2
(-)
( )
1345
2off
+
on
Fig. 14: Connection compartment
1 USB connection
2 Slideswitchforintegratedterminationresistor(120Ω)
Terminal Function Polarity
1 Voltage supply +
2 Voltage supply -
3 Modbus-Signal D0 +
4 Modbus-Signal D1 -
5 Function ground with installa-
tion according to CSA
5.4 Switch-on phase
After VEGAFLEX 86 is connected to the bus system, the instrument
carries out a self-test for approx. 30 seconds. The following steps are
carried out:
Internal check of the electronics
•
Indication of the instrument type, hardware and software version,
•
measurement loop name on the display or PC
Indication of the status message "F 105 Determine measured
•
value" on the display or PC
Status byte goes briey to fault value
•
As soon as a plausible measured value is found, it is outputted to the
signal cable. The value corresponds to the actual level as well as the
settings already carried out, e.g. factory settings.
22
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
6 Set up with the display and adjustment module
6 Set up with the display and adjustment
module
6.1 Adjustment volume
The display and adjustment module is only used for parameter adjustment of the sensor, i.e. for adaptation to the measurement task.
The parameter adjustment of the Modbus interface is carried out via
a PC with PACTware. You can nd the procedure in chapter "Set up
sensor and Modbus interface with PACTware".
6.2 Insert display and adjustment module
The display and adjustment module can be inserted into the sensor
and removed any time. Four positions displaced by 90° can be selected. It is not necessary to interrupt the power supply.
Proceed as follows:
1. Unscrew the housing cover
2. Place the display and adjustment module in the requested position onto the electronics and turn to the right until it snaps in
3. Screw housing cover with inspection window tightly back on
Removal is carried out in reverse order.
The display and adjustment module is powered by the sensor, an ad-
ditional connection is not necessary.
Fig. 15: Insertion of the display and adjustment module with single chamber
housing
Note:
If you intend to retrot the instrument with a display and adjustment
module for continuous measured value indication, a higher cover with
an inspection glass is required.
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
23
6 Set up with the display and adjustment module
6.3 Adjustment system
Fig. 16: Display and adjustment elements
1 LC display
2 Adjustment keys
Key functions
[OK] key:
•
– Move to the menu overview
– Conrm selected menu
– Edit parameter
– Save value
[->] key:
•
– Presentation change measured value
– Select list entry
– Select editing position
[+] key:
•
– Change value of the parameter
[ESC] key:
•
– interrupt input
– Jump to next higher menu
1
2
Adjustment sy
Switch-on phase
24
stem
The sensor is adjusted via the four keys of the display and adjustment module. The LC display indicates the individual menu items. The
functions of the individual keys are shown in the above illustration.
Approx. 10 minutes after the last pressing of a key, an automatic reset
to measured value indication is triggered. Any values not conrmed
with [OK] will not be saved.
After switching on, the VEGAFLEX 86 carries out a short self-test
where the device software is checked.
The output signal transmits a fault signal during the switch-on phase.
The following information is displayed on the display and adjustment
module during the startup procedure:
Instrument type
•
Device name
•
VEGAFLEX 86 • Modbus and Levelmaster protocol
42288-EN-130314
Software version (SW-Ver)
•
Hardware version (HW-Ver)
•
6 Set up with the display and adjustment module
Measured value indication
Quick setup
General information
With the [->] key you can move between three dierent indication
modes.
In the rst view, the selected measured value and a respective bargraph presentation are displayed.
In the second view, the selected measured value as well as a second
selectable value, e.g. the temperature value are displayed.
In the third view, the selected measured value is displayed in large
letters.
6.4 Parameter adjustment - Quick setup
To quickly and easily adapt the sensor to the application, select
the menu item "Quick setup" in the start graphic on the display and
adjustment module.
You can nd "Extended adjustment" in the next sub-chapter.
Measurement loop name
In the rst menu item you can assign a suitable measurement loop
name. You can enter a name with max. 19 characters.
Product type
In the next menu item you can see which product type the instrument
is suitable for. If your instrument is only suitable for a certain medium,
this menu item is not visible.
Application
In this menu item, you can select the application. You can choose
between level measurement and interface measurement. You can
also choose between measurement in a vessel or in a bypass or
standpipe.
evel measurement
L
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
Medium - dielectric constant
In this menu item, you can dene the medium type (product).
Max. adjustment
In this menu item, you can enter the max. adjustment for the level.
25
6 Set up with the display and adjustment module
Enter the appropriate distance value in m (corresponding to the
percentage value) for the full vessel. The distance refers to the sensor
reference plane (seal surface of the process tting). Keep in mind that
the max. level must lie below the dead band.
Min. adjustment
In this menu item, you can enter the min. adjustment for the level.
Enter the suitable distance value in m for the empty vessel (e.g.
distance from the ange to the probe end) corresponding to the percentage value. The distance refers tot he sensor reference plane (seal
surface of the process tting).
Interface measurement
Dielectric constant - upper medium
In this menu item, you can dene the medium type (product).
Max. adjustment
In this menu item, you can enter the max. adjustment for the level.
Enter the appropriate distance value in m (corresponding to the
percentage value) for the full vessel. The distance refers to the sensor
reference plane (seal surface of the process tting). Keep in mind that
the max. level must lie below the dead band.
Min. adjustment
In this menu item, you can enter the min. adjustment for the level.
Enter the suitable distance value in m for the empty vessel (e.g.
distance from the ange to the probe end) corresponding to the percentage value. The distance refers tot he sensor reference plane (seal
surface of the process tting).
Max. adjustment - Interface
Carry out the max. adjustment for the interface.
To do this, enter the percentage value and the suitable distance value
in m for the full vessel.
Min. adjustment - Interface
Carry out the min. adjustment for the interface.
To do this, enter the percentage value and the suitable distance value
in m for the empty vessel.
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26
VEGAFLEX 86 • Modbus and Levelmaster protocol
6 Set up with the display and adjustment module
Linearization
Linearization
A linearization is necessary for all vessels in which the vessel volume
does not increase linearly with the level - e.g. a horizontal cylindri-
cal or spherical tank, when the indication or output of the volume is
required. Corresponding linearization curves are preprogrammed
for these vessels. They represent the correlation between the level
percentage and vessel volume.
The linearization applies for the measured value indication and the
current output. By activating the suitable curve, the percentage vessel
volume is displayed correctly.
False signal suppression
High sockets and internal vessel installations cause interfering reections and can inuence the measurement.
A false signal suppression detects, marks and saves these false
signals so that they are no longer taken into account for the level and
interface measurement. We generally recommend carrying out a false
signal suppression to achieve the best possible accuracy. This should
be done with the lowest possible level so that all potential interfering
reections can be detected.
Enter the actual distance from the sensor to the product surface.
All interfering signals in this section are detected by the sensor and
stored.
The instrument carries out an automatic false signal suppression
as soon as the probe is uncovered. The false signal suppression is
always updated.
6.5 Parameter adjustment - Extended adjustment
For technically demanding measurement loops you can carry out
extended settings in "Extended adjustment".
Main menu
42288-EN-130314
VEGAFLEX 86 • Modbus and Levelmaster protocol
The main menu is divided into ve sections with the following functions:
Setup: Settings, e.g. measurement loop name, medium, vessel,
adjustment, signal output, device unit, false signal suppression,
linearization curve
Display: Settings, e.g., for language, measured value display, lighting
Diagnosis: Information, e.g. on instrument status, pointer, measure-
ment reliability, simulation, echo curve
Additional adjustments: Reset, date/time, reset, copy function
27
6 Set up with the display and adjustment module
Info: Instrument name, hardware and software version, calibration
date, instrument features
Note:
For optimum adjustment of the measurement, the individual submenu
items in the main menu item "Setup" should be selected one after
the other and provided with the correct parameters. If possible, go
through the items in the given sequence.
The procedure is described below.
Setup - Measurement
loop name
Setup - Units
Setup - Probe length
Here you can assign a suitable measurement loop name. Push the
"OK" key to start the processing. With the "+" key you change the sign
and with the "->" key you jump to the next position.
You can enter names with max. 19 characters. The character set
comprises:
Capital letters from A … Z
•
Numbers from 0 … 9
•
Special characters + - / _ blanks
•
In this menu item you select the distance unit and the temperature
unit.
With the distance units you can choose between m, mm and ft and
with the temperature units betwenn °C, °F and K.
In this menu item you can enter the probe length or have the length
determined automatically by the sensor system.
Setup - Application Product type
28
When choosing "Ye s ", then the probe length will be determined
automatically. When choosing "No", you can enter the probe length
manually.
42288-EN-130314
In this menu item you can select which type of medium you want to
measure. You can choose between liquid or bulk solid.
VEGAFLEX 86 • Modbus and Levelmaster protocol
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