VEGA FLEX52P User Manual
Operating Instructions
PROF I
BUS
PROCESS FIELD BUS
VEGAFLEX 51P and 52P (Profibus PA)
Level and Pressure
Contents
Safety information
Please read this manual carefully, and also take
note of country-specific installation standards
(e.g. the VDE regulations in Germany) as well
as all prevailing safety regulations and accident prevention rules.
For safety and warranty reasons, any internal
work on the instruments, apart from that involved in normal installation and electrical connection, must be carried out only by qualified
VEGA personnel.
2 VEGAFLEX 51P and 52P
Note Ex area
Please note the approval documents (yellow
binder), and especially the included safety
data sheet.
Contents
Contents
Safety information ........................................................................ 2
Note Ex area ................................................................................ 2
1 Product description
1.1 Function ................................................................................. 4
1.2 Application features ............................................................. 5
1.3 Adjustment media ................................................................ 5
1.4 Profibus output signal .......................................................... 6
1.5 Type code ........................................................................... 10
1.6 Bus configuration ............................................................... 11
1.7 Technical data ..................................................................... 14
1.8 Approvals ........................................................................... 17
1.9 Data format of the output signal ........................................ 17
1.10 Dimensions ......................................................................... 18
2 Mounting
2.1 Installation instructions ...................................................... 20
3 Electrical connection
3.1 Connection – Connection cable – Screening ................... 23
3.2 Sensor address ................................................................. 27
3.3 Connection of the sensor .................................................. 29
3.4 Connection of the external indicating instrument ............ 30
4 Setup
4.1 Adjustment media .............................................................. 31
4.2 Adjustment with the adjustment module MINICOM ........ 32
4.3 Adjustment with the PC ...................................................... 38
5 Diagnostics
5.1 Simulation ............................................................................ 43
5.2 Function diagram ............................................................... 43
5.3 Error rectification ................................................................ 48
5.4 PA parameters .................................................................... 49
VEGAFLEX 51P and 52P 3
1 Product description
Product description
1.1 Function
High frequency microwave impulses are
guided along a steel rope. When reaching
the product surface, the microwave impulses
are reflected. The running time of the impulses is processed by the integrated electronics and outputted as level.
The sensors measure the levels of all kinds of
solids. Density, conductivity, dust generation
and dielectric constant of the product do not
influence the measurement. Also, the changing features of a solid do not influence the
measured value.
Lime, cement, cereals, plastic granules, flour,
gravel - VEGAFLEX microwave sensors
solve difficult application problems in solids.
The level is also detected reliably in products
with varying moisture content or fluctuating
dielectric constant. High, narrow vessels or
steep material cones in which non-contact
measuring principles did not deliver optimum
measuring results, can be measured without
problem with VEGAFLEX.
VEGAFLEX 51 and 52 differ mainly in the
thickness of the measuring cable.
VEGAFLEX 51 has a cable with 4 mm diameter and is available up to a length of
10 m.
• Measuring range up to 20 m with low min.
distance.
• Up to 32 sensors (Ex area: 8 sensors) can
be connected via one two-wire cable.
• Two-wire sensor, supply and digital measuring signal via one two-wire cable.
• Unaffected by application conditions such
as:
- dust and noise generation
- humidity changes
- varying products
- buildup
• Adjustment without vessel filling or emptying.
• Unaffected by vessel material, e.g. metal,
concrete, plastic etc.
• Measuring cable or gravity weight must not
be insulated from the vessel.
The cable of VEGAFLEX 52 has a diameter of
8 mm and can have a length of up to 20 m.
Due to the stronger cable it is suitable for
solids subjected to higher extracting forces.
4 VEGAFLEX 51P and 52P
Product description
1.2 Application features
Applications
• Level measurement in solids.
• Measurement also in vacuum.
• All slightly conductive substances and all
products with a dielectric constant er > 1.7
can be measured.
• Measuring ranges
VEGAFLEX 51 0 … 10 m
VEGAFLEX 52 0 ... 20 m
Rugged
• High-resistance materials: PA, 1.4401.
Precise and reliable
• Resolution 1 mm.
• Unaffected by noise, steam, dust, gas
compositions and inert gas stratifications.
• Unaffected by varying density.
• Measurements under pressure up to
16 bar and at product temperatures up to
120°C.
Communicative
• Integrated measured value display.
• Optional display and adjustment module
separate from the sensor.
• Adjustment from the PLC level.
Approvals
• StEx Zone 10
• Ex Zone 0
1.3 Adjustment media
Adjustment with the adjustment module
MINICOM
With the 6-key adjustment module MINICOM
(3.2 cm x 6.7 cm) the adjustment can be
carried out in clear text dialogue. The adjustment module can be plugged into the VEGAFLEX or into the external indicating
instrument VEGADIS 50. It also possible to
adjust VEGAFLEX from the external indicating instrument VEGADIS 50.
Tank 1
m (d)
12.345
Pluggable adjustment module MINICOM
Adjustment with PC
The setup and adjustment of the VEGAFLEX
sensors can be done on the PC with the
adjustment program VVO (VEGA Visual Operating) under Windows®.
The software leads quickly through adjustment and parameter setting by means of
pictures, graphics and process
visualisations.
ESC
+
-
OK
The adjustment program VVO from VEGA
makes the full range of functions of VEGA
sensors accessible and, if necessary, can
update the entire sensor software. For this
reason, the adjustment program must be
installed on a PC which is equipped with a
Profibus Master Class 2 interface card
(Softing) (see figure under "1.4 Profibus
output signal").
VEGAFLEX 51P and 52P 5
Product description
The PC with the Profibus interface card can
be connected directly at any location to the
DP bus by means of the standard RS 485Profibus cable.
The adjustment and parameter data can be
saved with the adjustment software on the
PC. On request, the adjustment can be also
transferred to other sensors.
2
......
VEGALOG
VEGALOG
571 CPU
571 EA
1 ... 15
1 … 32
Adjustment with the PC and the standard cable
RS 232 on the VEGALOG processing system
1.4 Profibus output signal
As a process automation bus, Profibus PA
enables power supply over the bus. Up to 32
sensors can be operated on a shielded twowire cable that carries both power supply
and measuring signal. In Ex areas, up to ten
sensors can be connected from the PA level
to one two-wire cable (EEx ia).
Bus structure
The DP and PA bus consists of up to 126
master and slave participants. Data are always exchanged from point to point, with the
data traffic being exclusively controlled and
checked by master devices. Communication
is carried out according to the Token-Passing
procedure. This means that the master holding the token can contact the slaves, give
instructions, enquire data and cause the
slaves to receive and transmit data. After the
work is done or after a predetermined time
interval, the token is passed on by the master to the next master.
Master-Class 1
is the actual automation system, i.e. the process control computer or the PLC that enquires and processes all measured values.
Master-Class 2
One or several Master-Class 2 can operate in
a Profibus network. As a rule, Master-Class 2
devices are engineering, adjustment or visualisation stations. The VEGA adjustment software VVO (VEGA Visual Operating) operates
as Master-Class 2 participant on the DP bus
and can work on an engineering PC, on an
adjustment PC or on the process control
computer and can access any VEGA sensor
on the PA level.
6 VEGAFLEX 51P and 52P
Product description
Profibus adjustment structure
In the Profibus environment, there are different adjustment concepts and adjustment
tools which often differ considerably from
manufacturer to manufacturer. From the user’s point of view, a manufacturer-independent adjustment program which could be
operated directly on the Profibus DP, but also
at a central point (e.g. the engineering station
or the process control), would be ideal.
In the past, only the program "SIMATIC PDM",
based on the HART® adjustment structure,
could fulfil this wish. However, this program
also has the limitations common to HART®. As
with HART®, the availability of an instrumentspecific database for a comprehensive adjustment with PDM (Process Device Managing) is a requirement. Otherwise, only the
basic instrument functions such as adjustment will be available. In the PDM environment, this instrument-specific database is
called EDD (Electronic Device Description),
in complete analogy to the HART® environment which, except for the VEGA-HART
instruments, also requires a DD (Device
Description) for each sensor.
®
VEGAFLEX 51P and 52P 7
Product description
Adr. 21
SPS
Adr. 22
VVO
3
PA-
Adr. 23
Master-Class 1
Adr. 1
DP-Bus
Adr. 24
DP interface card as MasterClass 2 (e.g. Softing)
Adr. 10
3
Adr. 57
Segment coupler
Adr. 25 … 56
2
(max. 32 participants)
Adr. 58
Adr. 60
Adr. 59
Adjustment of the VEGAFLEX sensors from the process control via a Profibus interface card in the process
control computer or in an additional PC. The adjustment software VEGA Visual Operating (VVO) accesses via
the interface (interface card) the sensors bidirectionally.
8 VEGAFLEX 51P and 52P
Product description
Adjustment with adjustment module
MINICOM
With the small (3.2 cm x 6.7 cm) 6-key adjustment module with display in the sensor,
the sensor-relevant adjustments can be carried out directly on the sensor.
Tank 1
m (d)
12.345
Detachable adjustment module MINICOM
The adjustment module can be plugged into
the sensor or into the optional, external indicating instrument.
ESC
+
-
Tank 1
m (d)
12.345
OK
2
PA-Bus
ESC
+
-
OK
Adjustment with the SIMA TIC PDM adjustment program
For adjustment of all essential functions of the
VEGA sensor with the adjustment station
SIMATIC PDM from Siemens, a so-called
EDD is required. Without this EDD, only the
basic functions such as min./max. adjustment
or the integration time can be adjusted with
the PDM adjustment program. Further important adjustment functions, such as input of
measuring environment data or false echo
storage, are not available without EDD. After
integration of the EDD files in the Simatic PDM
adjustment software, all important adjustment
functions are accessible. If it is not at hand,
the obligatory GSD (instrument master file)
as well as the EDD (Electronic Device Description) necessary for PDM can be
downloaded from the VEGA-Homepage
(http://www.vega.com).
ESC
+
-
Tank 1
m (d)
12.345
OK
4
max. 25 m
Adjustment with detachable adjustment module. The
adjustment module can be plugged into the sensor or
the external indicating instrument VEGADIS 50.
The sensor can be adjusted with the adjustment module MINICOM and basic functions
can be set. Beside the measuring conditions
and the simulation mode, the Profibus address can also be adjusted and a false echo
storage can be carried out, see "4.2 Adjustment with MINICOM".
VEGAFLEX 51P and 52P 9
1.5 Type code
The second figure of the type name, e.g.
VEGAFLEX 5[1]… distinguishes the instruments acc. to the stability of the cable.
The letter, e.g. VEGAFLEX 51[P] indicates
the output signal:
K stands for an analogue 4 … 20 mA output
signal (compact instrument)
V stands for a digital output signal (VBUS).
P stands for a digital output signal with Profibus PA
VEGAFLEX XX P EXS.X G
G - Connection to segment coupler Profibus PA
Dust Ex approved
P - Digital output signal for connection to
Profibus PA
Type 51: Instrument series with 4 mm cable
Type 52: Instrument series with 8 mm cable
Measuring technology (FLEX for guided microwave)
Product description
10 VEGAFLEX 51P and 52P
Product description
1.6 Bus configuration
The type of sensor you use depends on the
process requirements and mounting conditions, as well as on the requirements of your
control, regulative, or process control system.
VEGAFLEX 51P and 52P Profibus sensors
are sensors for use in Profibus PA environment. Profile 3 has been implemented in the
sensors. A measuring system consists of
one or several sensors, one or several segment couplers and one DP master computer,
such as e.g. a S7 PLC with Profibus interface
or a process control system with Profibus
DP-Master-Slot. The processing unit, e.g. the
PLC, evaluates the level-proportional, digital
measuring signals in a number of evaluation
routines and puts them to use process-specifically.
On the following two pages you will find a
schematic of the bus configuration.
The automation system as Master-Class 1
takes over the complete bus control. It reads
out all signals cyclically and, if necessary,
gives instructions to the participants (e.g.
sensors). In addition, further master systems
(e.g. visualisation systems or adjustment
tools) can be connected to the DP bus.
These systems operate as so-called MasterClass 2 participants. Like the Master-Class 1
system, they can read out signals, give instructions and operate in acyclical mode.
A DP bus does not allow power supply via
signal cable, whereas the PA bus does. Both,
DP and PA, require at least one screened
two-wire cable. The DP bus can additionally
have up to 8 cores (screened), some of
which can be supply cables.
Each participant on the bus must have an
address. The addressing covers both bus
levels. A Profibus DP system can have max.
126 participants, including all participants on
the PA level. In practice, each Master-Class 1
computer gets address 1 and the MasterClass 2 computers address 10 … 20. As a
rule, the slaves or participants get the addresses 21 … 126. On the Profibus PA level,
max. 32 sensors are possible on one PA
segment coupler.
Ex environment
In Ex environment, intrinsically safe (EEx ia)
PA sensors are used with Ex segment couplers. Generally, the number of PA sensors
on a segment coupler (Ex or non Ex) depends on the current requirement of the
sensors and on the current supplied by the
segment coupler. Segment couplers for
EEx ia environment provide 90 … 110 mA.
The number of sensors results from the sum
of:
- the basic current intake of all sensors
- plus 9 mA communication signal
- plus the leakage currents of all sensors
- plus a recommended current reserve
(approx. 10 mA)
The min. basic current has been set at 10 mA
according to the Profibus specification.
VEGA Profibus sensors constantly consume
a basic current of 10 mA and operate without
leakage current requirement, so that in Ex
environment, up to ten VEGA sensors can be
operated on one segment coupler.
VEGAFLEX 51P and 52P 11
Address 1
Product description
2…8
Segment
coupler
PLC/DCS
Address
21...52
3
2
Profibus PA
21 22 52
1 … 32 sensors
(Ex: 1 … 10)
Master-Class 2
interface card
12 VEGAFLEX 51P and 52P
Address 10
Product description
Profibus DP
Segment
coupler
Address
53...84
M
Address
85
3~M
Address
86
2
Profibus PA
53 54 84
Address
87
1 … 32 sensors
VEGAFLEX 51P and 52P 13
Technical data
1.7 Technical data
Power supply
Supply voltage 9 … 32 V DC)
(output voltage UO of the segment dependent on the segment coupler used
coupler) see PA specification, e.g.
- non Ex e.g. 22 V DC (nominal voltage of the segment
- Ex 13.5 V DC nominal voltage of the segment
Current consumption constant 10 mA (no leakage current output)
Cable load dependent on the segment coupler, see
Measuring range
VEGAFLEX 51 0.3 … 10 m
VEGAFLEX 52 0.3 … 20 m
Output signal
digital (Profibus) two-wire technology:
Integration time 0 … 999 seconds (adjustable)
coupler) max. 32 sensors on one two-wire
cable
coupler max. 10 sensors on one two-wire
cable (typical 8 sensors)
technical data of the segment couplers and
Profibus specification
the digital output signal (meas. signal is
modulated onto the power supply and is further
processed in the PLC or in the process control
Adjustment
- adjustment software VEGA Visual Operating on Master-Class 2 PC
- adjustment module MINICOM in the sensor or in the external indicating instrument
(optional)
- process adjustment interface PACTwareTM (VVO as subprogram)
- SIMATIC PDM in conjunction with Electronic Device Description (EDD)
Accuracy
1)
(under reference conditions acc. to IEC 770 - relating to the max. measuring range)
Linearity error < 0.1 %
Temperature drift 0.015 %/10 K
Characteristics linear
Deviation in characteristics including
linearity, reproducibility and
hysteresis (determined acc. to the
limit point method) better than 0.05 %
Average temperature coefficient of the
zero signal 0.06 %/10 K
Resolution general max. 1 mm
Resolution of the output signal 0.005 % or 1 mm
1)
Similar to DIN 16 086, reference conditions according to IEC 770, e.g.
temperature 15°C … 35°C; moisture 45 % … 75 %; pressure 860 mbar … 1060 mbar
3)
The adjustment time (also actuating time, response time or adjustment period) is the time the sensor
requires to output the correct level (with max. 10% deviation) after a quick level change.
14 VEGAFLEX 51P and 52P
Technical data
Characteristics
Min. span between full and empty adjustment
- digital output signal 10 mm
Adjustment time
2)
> 1 s (depending on the parameter setting)
Measuring range begin 300 mm below the seal surface
Measuring range end upper edge of the gravity weight or
the cable loop
Ambient conditions
Vessel pressure -1 … 16 bar
Ambient temperature on the housing -40°C … +60°C
Process temperature -40°C … +120°C
Storage and transport temperature -60°C … +80°C
Protection IP 66/IP 67 (meets both protections)
Protection class
- two-wire sensor II
Overvoltage category III
Max. tensile load
- cable ø 4 mm 5 KN
- cable ø 8 mm 20 KN
Ex technical data
StEx Zone 10
Ex Zone 0
The permissible operating data of VEGAFLEX sensors for StEx areas are stated in the
certificate.
Process connections
VEGAFLEX 51 and 52 G 11/2 A, 11/2" NPT
chromized steel or 1.4301 (stainless steel)
Connection cables
Two-wire sensors power supply and signal via one
Wire cross-section generally 2.5 mm
two-wire cable
Ground connection max. 4 mm
2
2
Cable entry 2 x M20 x 1.5 (cable entry 5 … 9 mm)
Materials
Housing PBT (Valox) or Aluminium (powder-coated)
Cable 1.4401 (stainless steel, 316) or
galvanized steel/PA coated
VEGAFLEX 51P and 52P 15
Product description
CE conformity
VEGAFLEX sensors meet the protective regulations of EMC (89/336/EWG) and NSR (73/
23/EWG). Conformity has been judged acc. to the following standards:
EMC Emission EN 50 081 - 1: 1992
Susceptibility EN 50 082 - 2: 1995
NSR EN 61 010 - 1: 1993
Display indication
Display scalable analogue and digital
display of measured values (option)
An external measured value display powered by the sensor can be mounted at a distance
of up to 25 m from the sensors.
Signal output
Signal output digital output signal in two-wire technology
(Profibus)
Two-wire technology:
The digital Profibus output signal (measuring signal) is superimposed on the power supply
and further processed in the signal conditioning instrument or in the processing system.
16 VEGAFLEX 51P and 52P
Product description
1.8 Approvals
VEGAFLEX sensors are approved for StEx Zone 10.
Please note the attached approval documents if you want to use a sensor in Ex environment.
1.9 Data format of the output signal
Byte4 Byte3 Byte2 Byte1 Byte0
Status Meas. value (IEEE-754 format, see below)
Status byte:
The status byte corresponds to the profile 3.0 "Profibus PA Profile for Process Control Devices" coded. The status "Meas. value OK" is coded as 80 (hex) (Bit7 = 1, Bit 6 … 0 = 0).
Measured value:
The meas. value is transferred as 32 Bit floating point number in the IEEE-754 format.
Byte n Byte n+1
Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit
7654321076543210
VZ 27262524232221202-12-22-32-42-52-62
Sign
Exponent Mantissa
-7
Byte n+2 Byte n+3
Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit Bit
7654321076543210
2-82-92
-102-112-122-132-142-152-162-172-182-192-202-212-222-23
Mantissa Mantissa
Formula: Meas. value = (-1)VZ • 2
Examples: 41 70 00 00 (hex) = 0100 0001 0111 0000 0000 0000 0000 0000 (bin)
Meas. value = (-1)0 • 2
(Exponent - 127)
(130 - 127)
• (1 + 2-1 + 2-2 + 2-3)
• (1 + Mantissa)
= 1 • 23 • (1 + 0.5 + 0.25 + 0.125)
= 1 • 8 • 1.875
= 15.0
VEGAFLEX 51P and 52P 17
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