Siemens SL Technical data

Continuous gas analysis
In situ Laser Gas Analyzers
SITRANS SL
Introduction
1
Description
2
Application planning
3
Installing
4
Explosion protection
5
Commissioning
6
Operation
7
Interfaces to automation
systems
8
Service and maintenance
9
Alarm, error, and system
messages
10
Technical data
11
Dimension drawings
12
Spare parts and accessories
13
Operating Instructions
12/2010
A5E01132948-04
Appendix
A
List of abbreviations
B
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
CAUTION
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
NOTICE
indicates that an unintended result or situation can occur if the corresponding information is not taken into
account.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation for the specific task, in particular its warning notices and
safety instructions. Qualified personnel are those who, based on their training and experience, are capable of
identifying risks and avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be adhered to. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this
publication may be trademarks whose use by third parties for their own purposes could violate the rights of the
owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
order number: A5E01132948
Ⓟ 12/2010
Copyright © Siemens AG 2008,
2009, 2010.
Technical data subject to change
Table of contents
1
2
3
Introduction................................................................................................................................................ 9
1.1
Purpose of this documentation ......................................................................................................9
1.2
History ............................................................................................................................................9
1.3
Product versions ..........................................................................................................................10
1.4
General information .....................................................................................................................11
1.5
Special information and warnings ................................................................................................11
1.6
Warranty conditions .....................................................................................................................12
1.7
Delivery information .....................................................................................................................12
1.8
Standards and regulations ...........................................................................................................12
Description............................................................................................................................................... 13
2.1
Overview ......................................................................................................................................13
2.2
Benefit ..........................................................................................................................................14
2.3
Range of application ....................................................................................................................15
2.4
2.4.1
2.4.2
2.4.3
2.4.4
Design ..........................................................................................................................................16
Transmitter and receiver units .....................................................................................................16
Display and control panel.............................................................................................................19
Cables for connection ..................................................................................................................20
Inputs/outputs...............................................................................................................................21
2.5
2.5.1
2.5.2
2.5.3
2.5.4
Functional description ..................................................................................................................22
Operating principle.......................................................................................................................22
Influences on the measurement...................................................................................................24
Maintenance and fault messages ................................................................................................28
Essential characteristics ..............................................................................................................29
2.6
Product characteristics.................................................................................................................30
Application planning................................................................................................................................. 31
3.1
Cable selection recommendations...............................................................................................31
3.2
3.2.1
3.2.2
3.2.3
3.2.4
Network and system integration...................................................................................................32
Overview ......................................................................................................................................32
Analog I/O and digital I/O system configuration...........................................................................33
PROFIBUS DP system configuration ..........................................................................................35
Modbus system configuration ......................................................................................................37
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5
Table of contents
4
5
6
Installing .................................................................................................................................................. 39
4.1
Safety information ....................................................................................................................... 39
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
Mounting...................................................................................................................................... 40
Mounting conditions .................................................................................................................... 40
Preparations................................................................................................................................ 41
Installation of process flanges..................................................................................................... 43
Installation of the sensors ........................................................................................................... 44
Installation of the purging tubes .................................................................................................. 45
4.3
4.3.1
4.3.2
4.3.3
Electric connections non Ex ........................................................................................................ 46
System set-up (non Ex only) ....................................................................................................... 47
Screw terminals........................................................................................................................... 48
Connecting cables....................................................................................................................... 52
4.4
4.4.1
4.4.2
Alignment of SITRANS SL .......................................................................................................... 57
Alignment kit................................................................................................................................ 58
Alignment procedure ................................................................................................................... 59
4.5
4.5.1
4.5.2
4.5.3
Purging ........................................................................................................................................ 64
Sensor side purging .................................................................................................................... 64
Process side purging................................................................................................................... 65
Purging set-up............................................................................................................................. 66
Explosion protection ................................................................................................................................ 67
5.1
5.1.1
5.1.2
5.1.3
5.1.4
ATEX ........................................................................................................................................... 67
Safety information ....................................................................................................................... 67
Installation ATEX......................................................................................................................... 70
ATEX system set-up ................................................................................................................... 71
Electric connections in the ATEX system ................................................................................... 73
5.2
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
FM ............................................................................................................................................... 78
Introduction ................................................................................................................................. 78
Safety information ....................................................................................................................... 78
Installation of the FM version of SITRANS SL ............................................................................ 81
FM system set-up........................................................................................................................ 82
Electric connections in the FM system........................................................................................ 84
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Table of contents
6
7
8
Commissioning ........................................................................................................................................ 87
6.1
General information for commissioning .......................................................................................87
6.2
6.2.1
6.2.2
Starting SITRANS SL for the first time.........................................................................................88
Defining the path length ...............................................................................................................88
Further input parameters .............................................................................................................89
6.3
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
6.3.6
6.3.7
6.3.8
PROFIBUS configuration for SITRANS SL..................................................................................89
Cyclic data transfer ......................................................................................................................89
System integration .......................................................................................................................90
SIMATIC MPI cable installation ...................................................................................................90
PG/PC interface setting ...............................................................................................................91
Loading GSD file ..........................................................................................................................92
Network configuration with SIMATIC Manager............................................................................95
Creation of a new project with SIMATIC Manager.......................................................................96
Hardware configuration..............................................................................................................101
6.4
6.4.1
6.4.2
6.4.3
Modbus configuration for SITRANS SL .....................................................................................106
Modbus settings.........................................................................................................................106
Byte and word ordering..............................................................................................................106
Supported Modbus functions .....................................................................................................107
Operation............................................................................................................................................... 109
7.1
General ......................................................................................................................................111
7.2
Measurement views ...................................................................................................................114
7.3
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
7.3.7
Menu system..............................................................................................................................115
The menu structure....................................................................................................................115
Configuration..............................................................................................................................116
Diagnostics.................................................................................................................................120
Service .......................................................................................................................................122
Communication ..........................................................................................................................125
Security ......................................................................................................................................127
Language ...................................................................................................................................128
Interfaces to automation systems .......................................................................................................... 129
8.1
8.1.1
8.1.2
8.1.3
8.1.4
8.1.4.1
8.1.4.2
PROFIBUS DP interface............................................................................................................129
PROFIBUS installation...............................................................................................................129
Device data base files (GSD).....................................................................................................131
Technical data............................................................................................................................131
Cyclic data transmission over PROFIBUS.................................................................................132
Cyclic data structure ..................................................................................................................132
Quality byte ................................................................................................................................133
8.2
8.2.1
8.2.2
8.2.3
8.2.4
8.2.4.1
8.2.4.2
8.2.4.3
Modbus interface .......................................................................................................................136
Modbus installation ....................................................................................................................136
SITRANS SL Modbus map for gas measurement .....................................................................137
Quality byte coding ....................................................................................................................138
Modbus adresses.......................................................................................................................141
Standard Modbus.......................................................................................................................141
Enron Modbus............................................................................................................................143
Modbus alarm list.......................................................................................................................146
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
7
Table of contents
9
10
11
Service and maintenance ...................................................................................................................... 149
9.1
9.1.1
9.1.1.1
9.1.1.2
9.1.2
9.1.2.1
9.1.3
Instrument verification ............................................................................................................... 149
Verification with the verification tube......................................................................................... 150
Verification tube ........................................................................................................................ 150
Span verification........................................................................................................................ 151
Verification with a verification cell ............................................................................................. 157
Span verification........................................................................................................................ 157
Verification of systems used in hazardous areas ..................................................................... 159
9.2
Cleaning the optical parts of the sensor.................................................................................... 160
Alarm, error, and system messages ...................................................................................................... 163
10.1
Alarm ......................................................................................................................................... 163
10.2
Alarm list.................................................................................................................................... 170
10.3
10.3.1
10.3.2
PROFIBUS diagnosis and alarms............................................................................................. 177
Diagnosis and alarm handling in PROFIBUS DP ..................................................................... 177
Meaning of the diagnosis information ....................................................................................... 178
Technical data ....................................................................................................................................... 181
11.1
12
Dimension drawings .............................................................................................................................. 187
12.1
13
A
B
Technical data........................................................................................................................... 181
Dimensional drawings ............................................................................................................... 187
Spare parts and accessories ................................................................................................................. 191
13.1
Spare parts................................................................................................................................ 191
13.2
Accessories ............................................................................................................................... 193
Appendix................................................................................................................................................ 195
A.1
Gas flow calculations ................................................................................................................ 195
A.2
ESD (ElectroStatic Discharge) .................................................................................................. 196
A.3
Verification Sheets .................................................................................................................... 198
A.4
Service and support .................................................................................................................. 201
A.5
A.5.1
A.5.2
Returned deliveries ................................................................................................................... 202
Returned deliveries form ........................................................................................................... 203
Decontamination declaration..................................................................................................... 204
List of abbreviations............................................................................................................................... 205
Glossary ................................................................................................................................................ 209
8
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
1
Introduction
1.1
Purpose of this documentation
Before beginning work with this device, please study this manual carefully! It contains
important information and data whose observation ensures proper device function and saves
you servicing costs. The manual will help you to operate the device more easily and
efficiently, allowing you to achieve reliable results.
1.2
History
The following table shows the most important changes in the documentation compared to
each previous edition:
Edition
Remark
01
03/2008
First edition
02
05/2009
Revision of contents and layout
 Illustrations of the device have been changed due to changes of the device
housing.
 All chapters have new enhanced contents, except the following chapters:
– NEW: " Network and system integration""
– NEW: "Process interfacing over an automation system (PLC, PC)"
– NEW: "Spare parts and accessories"
– NEW: "Service and support"
– NEW: "Interfaces to automation systems"
– NEW: "Glossary"
03
07/2010
Revision of contents and layout
 Carbon monoxide (CO) introduced as measuring gas
04
12/2010
Update of contents and layout
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
9
Introduction
1.3 Product versions
1.3
Product versions
The product version number is found under the article number on the nameplate (see
following figure).
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1DPHSODWHVKRZLQJWKHSRVLWLRQRIWKHYHUVLRQQR
10
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Introduction
1.4 General information
1.4
General information
The product described in this manual has left the factory in a high quality and tested
condition. In order to preserve this condition and to operate this product correctly and safely,
it may only be used in the manner described by the manufacturer. Furthermore, proper
transportation, storage, installation, operation and maintenance of the device is vital for
ensuring correct and safe operation.
This manual contains the information required for the intended use of the described product.
It is addressed to technically qualified personnel who are specially trained or who have the
relevant knowledge of automation technology (measuring and control systems).
Knowledge and technically correct implementation of the safety notes and warnings
contained in this manual are required for safe installation and commissioning, as well as for
safety during the operation and maintenance of the described product. Only qualified
personnel have the required professional knowledge for correctly interpreting the generally
valid safety notes and warnings in this manual in each specific case and to act accordingly.
This manual is an inherent part of the scope of delivery, despite the fact that it can be
ordered separately for logistic reasons.
Due to the variety of technical details, it is not possible to consider every single detail for all
versions of the described product and for every conceivable case in the set-up, operation,
maintenance and use in systems. For further information, or in the case of problems which
are not covered in enough detail in this document, please request the required information
from your local or responsible Siemens regional office.
Note
In particular, before using the device for new research and development applications, we
recommend that you first contact your Siemens representative or our application department
to discuss the application in question.
1.5
Special information and warnings
This manual provides you with information on using, installing, operating, and maintaining
the device.
Pay particular attention to all special information and warnings. Information of this type is set
apart from the rest of the text and is marked with the corresponding pictograms. This
information provides you with useful tips and helps to avoid faulty operation.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
11
Introduction
1.6 Warranty conditions
1.6
Warranty conditions
We expressly point out that the product quality is exclusively and conclusively described in
the sales contract. The content of this product documentation is neither a part of a previous
or existing agreement, promise or legal relationship, nor is it intended to modify these. All
obligations on the part of Siemens AG are contained in the respective sales contract, which
also contains the complete and solely applicable liability provisions. The provisions defined
in the sales contract for the responsibility for defects are neither extended nor limited by the
remarks in this document.
1.7
Delivery information
The respective scope of delivery is listed on the shipping documents – enclosed with the
delivery – in accordance with the valid sales contract.
When opening the packaging, please observe the corresponding information on the
packaging material. Check the delivery for completeness and undamaged condition. In
particular, you should compare the Order No. on the rating plates with the ordering data, if
available.
If possible, please retain the packaging material, since you can use it again in case of return
deliveries.
1.8
Standards and regulations
As far as possible, the harmonized European standards were the basis for the specification
and production of this device. If no harmonized European standards have been applied, the
standards and regulations for the Federal Republic of Germany are valid.
When this product is used beyond the scope of these standards and regulations, the valid
standards and regulations of the country of the operating company apply.
12
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
2
Description
2.1
Overview
SITRANS SL is a diode laser gas analyzer with a measuring principle based on the specific
light absorption of different gas components. SITRANS SL is suitable for fast, non-contact
measurement of gas concentrations in process or flue gases. An analyzer consisting of
transmitter and receiver unit (sensors) is used for each measuring point. The hardware for
further processing of the measured signal into a concentration value, as well as the
monitoring, control and communication functions, are integrated in these two main modules.
The sensors are designed for operation under harsh environmental conditions.
Figure 2-1
SITRANS SL, typical setup
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
13
Description
2.2 Benefit
2.2
Benefit
The in-situ SITRANS SL gas analyzer features high operational availability, unique analytical
selectivity, and a wide range of possible applications. SITRANS SL permits measurement of
a gas component directly in the process:
● With high dust load
● In hot, humid, corrosive, explosive, or toxic gases
● In applications showing strong varying gas compositions
● Under harsh environmental conditions at the measuring point
● Highly selective, i.e. mostly without cross-sensitivities
Special features of the SITRANS SL:
● Little installation effort
● Minimum maintenance requirements
● Extremely rugged design
● High long-term stability through built-in, maintenance-free reference gas cell
● Real-time measurements
Moreover, the analyzer provides warning and error messages:
● When maintenance is required
– With large variations in the reference signal
– With poor signal quality
● If the transmission violates an upper or lower limit
14
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Description
2.3 Range of application
2.3
Range of application
Sections
● Chemical and petrochemical plants
● Power plants
● Waste incinerators
● Iron and steel industry
Applications
● Control of combustion processes
● Process optimization
● Plant and operator safety
● Process measurements in all types of power and combustion plants
● Process control
● Explosion protection
● Measurements in corrosive and toxic gases
● Quality control
An overview of standard applications can be obtained from Technical data (Page 181),
section 'Standard applications'.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
15
Description
2.4 Design
2.4
Design
The SITRANS SL gas analyzer consists of a pair of cross-duct sensors - a transmitter unit
and a receiver unit - both with the same dimensions. The complete analyzer is integrated in
these two enclosures (pos. 1 and 7, fig. 2.2). The transmitter unit contains the laser source
which light is transmitted to the receiver through the measurement path. The receiver unit
contains a photodetector including electronics as well as a reference cell. The receiver unit is
connected to the transmitter unit by means of a sensor connection cable. The connection
cable of the receiver is used to connect the power supply and the communication interfaces.
The receiver enclosure contains a local user interface (LUI) with an LC display which can be
read through a window in the lid. The LUI is normally operated via a remote control panel.
2.4.1
Transmitter and receiver units
Special features of the transmitter and receiver units:
● Two in situ cross duct sensors, designed as transmitter and receiver units, connected via
sensor connection cable
● Process interface which
– consists of identical assemblies for transmitter and receiver
– is the interconnection between the transmitter/receiver units and the process
● Powder-coated aluminium; stainless steel
● Degree of protection IP65
● Adjustable flanges
● Suitable for a flange connection to DN50/PN10-40, ANSI 4"/150 lbs
● Purging facilities on the process and the sensor sides, configurable application with
purging gas connections
16
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Description
2.4 Design
Non Ex version and sensor connection cable kit
①
Transmitter housing
⑨
②
Transmitter tube unit
⑩, ⑪
Process interface
Customer flange (not included)
⑬
⑭
Purging tube (accessory)
Sensor connection cable kit (accessory), consisting of
③
④
⑤
⑥
⑦
⑧
Receiver tube unit
Receiver housing
Connection cable (accessory)
Figure 2-2
⑫
⑮
⑯
⑰
Large cable gland (for cables with a diameter of
13 ... 18 mm)
Small cable gland (for cables with a diameter of
8 ... 12 mm)
Reference cell inside the receiver unit
Remote control
Sensor connection cable
Receiver junction box
Receiver junction box cable
Cable gland for Ethernet cable
Connection of a non Ex system with the sensor connection cable kit (accessory)
The sensor connection cable is used to connect the transmitter unit to the receiver unit. This
can be done either directly, or via a receiver junction box (see preceding figure). A sensor
connection cable kit is available as accessory.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
17
Description
2.4 Design
ATEX version
aP
/PD[ P
aP
①
②
③
④
⑤
⑥
⑦
Process interface
⑪
⑫
⑭
Customer flange (not included)
Receiver junction box kit, consisting of
Transmitter housing
Transmitter tube unit
Receiver housing
⑧
⑨
⑳
⑩
Remote control
Ex-e receiver junction box
Receiver junction box cable
Cable gland for Ethernet cable
Transmitter junction box kit, consisting of
⑱
⑲
Connection cable
ATEX cable gland
Connection cable solution - PROFIBUS DP
ATEX cable gland
Sensor connection cable
⑮
⑯
⑰
Purging tube (accessory)
Receiver tube unit
Connection cable solution Analog I/O, Modbus:
Ex-e transmitter junction box
Transmitter junction box cable
Mounting bracket for junction box
Connection cable
ATEX cable gland
Figure 2-3
Design of the ATEX version of the SITRANS SL system
See also
Electric connections in the ATEX system (Page 73)
Electric connections in the FM system (Page 84)
18
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Description
2.4 Design
2.4.2
Display and control panel
Special features of the receiver unit:
● Display for simultaneous output of result and device status.
● LED backlighting of display.
● Menu-driven operation for parameterization and diagnostics.
● Remote operation via infrared interface for safe use in hazardous zones.
● Remote control using membrane keypad and softkeys which are easy to clean.
Figure 2-4
Local user interface (LUI) of SITRANS SL in the receiver unit (display of measured
value)
Figure 2-5
Remote contol keypad for SITRANS SL
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
19
Description
2.4 Design
2.4.3
Cables for connection
● The SITRANS SL is normally delivered without cabling, except for the ATEX version.
● For non-Ex versions the accessory "sensor connection cable kit" is used to connect the
transmitter and receiver unit of the analyzer, while the connection cable is needed to
connect the SITRANS SL electrically to your process control system. All materials used
are flame-retardant.
● A sensor connection cable kit is available as an accessory and provides the sensor
connection cable, i.e. the cable connecting receiver and transmitter of the SITRANS SL.
The sensor connection cable is available in lengths of 5 m, 10 m or 25 m length
according to your order.
● The sensor connection cable kit also provides the possibility of a permanent installation of
an Ethernet cable.
● A protective hose should be used as UV protection for installations in open cable ducts or
channel systems. It is available as an accessory.
● The statutory directives must be observed in the event of installation in hazardous areas.
For cable specifications refer to section Cable selection recommendations (Page 31)
Electric connections in the ATEX system
● The system is delivered with pre-mounted cables. The connections inside the unit
housings are set up in the factory before delivery and modifications can only be done by
certified technicians.
● The junction boxes mounted to the receiver and the transmitter provide connections for
the sensor connection and the Ethernet cables.
● An Ex-e classified junction box is required to install the connection cable to your process
control system. A suitable junction box is available as an accessory (not represented in
the figure above).
● The sensor connection cable (⑫, fig. 2.3) is delivered with unprepared ends. It has to be
prepared according to section Electric connections in the ATEX system (Page 73).
● The ATEX version of the SITRANS SL is delivered with a sensor connection cable of the
ordered length. This sensor connection cable must be connected between the Ex-e
junction boxes mounted on the receiver and the transmitter.
● All cable kits are part of the delivery and can be ordered separately as spare parts.
See also
Transmitter and receiver units (Page 16)
20
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Description
2.4 Design
2.4.4
Inputs/outputs
● 2 analog inputs (4 to 20 mA) for process gas temperature and pressure
● 2 analog outputs (4 to 20 mA) for gas concentration or for concentration and transmission
● 1 configurable binary input for quality information of external sensor
● 2 freely configurable binary outputs (display of faults, maintenance request, function
monitoring, alarms for limit violations of measured value or transmission)
● Optional: 1 PROFIBUS DP interface with:
– Output of gas concentration as cyclic data
– Alarm output, alarm classification
– Input for temperature and/or pressure data for compensation
The PROFIBUS DP protocol provides DPV0, cyclic data. Measured values are provided
with additional quality data.
Note
The PROFIBUS DP hybrid cable provides an unused pair of wires to connect one of the
analog or binary inputs or outputs mentioned above.
● Optional: 1 Modbus interface with:
– Output of gas concentration as cyclic data
– Alarm output, alarm classification
– Input for temperature and/or pressure data for compensation
● 1 Ethernet 10Base-T port, only for service and maintenance. Using Ethernet, the analyzer
supports the following software:
– LDSComm (PC software for service and maintenance engineers)
– SITRANS SL updater (PC software for service engineers)
Note
For the non-Ex version the junction box of the sensor connection cable kit is required
for permanent installation of an Ethernet cable.
WARNING
In hazardous environments, all electric cables may only be connected or
disconnected with the permission of the plant manager (hot work permit)!
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
21
Description
2.5 Functional description
2.5
Functional description
2.5.1
Operating principle
SITRANS SL is a gas analyzer employing single line molecular absorption spectroscopy. A
diode laser emits a beam of infrared light which passes through the process gas and is
detected by a receiver unit. The wavelength of the laser diode output is tuned to a gas
specific absorption line. The laser continuously scans this single absorption line with a very
high spectral resolution (see following figure). The degree of absorption and the line shape
are used for the evaluation. The measurement is free of cross-interferences, since the quasimonochromatic laser light is absorbed very selectively by only one specific line in the
scanned spectral range.
①
②
Absorption line
Laser line
Figure 2-6
Typical spectral bandwidth of an absorption line compared to the bandwidth of the laser
light.
The field design of the SITRANS SL in-situ gas analyzer consists of a transmitter unit and a
receiver unit. The light which is not absorbed by the sample is detected in the receiver. The
concentration of the gas component is determined from the absorption.
The individual dependencies of concentration, pressure and temperature are application
specific.
An internal reference cell is used to constantly check the stability of the spectrometer, thus
assuring a continuous self-calibration of the analyzer.
The self-calibration of the analyzer is therefore valid for the time period specified in the
technical data without the necessity for external recalibration using calibration gases.
22
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Description
2.5 Functional description
Configuration
The main feature of the in-situ analytical procedure is that the physical measurement takes
place directly in the stream of process gas and directly in the actual process gas line. All
process parameters such as gas matrix, pressure, temperature, moisture, dust load, flow
velocity and mounting orientation can influence the measuring properties of the SITRANS SL
and therefore must be considered for each new application.
The standard applications listed in the ordering data for the SITRANS SL are distinguished in
that the typical process conditions are adequately well-known and documented. If you
cannot find your application among the standard applications, please contact Siemens AG.
We will be pleased to check your possible individual application of the SITRANS SL.
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Figure 2-7
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Typical cross-duct arrangement of the SITRANS SL
Purging gas flow is used to prevent contamination of the sensor optics on the process side.
Purging tubes on the sensor heads, which slightly extend into the process gas stream, define
the effective measuring path length.
See also
Technical data (Page 181)
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
23
Description
2.5 Functional description
2.5.2
Influences on the measurement
Dust load
As long as the laser beam is able to generate a suitable detector signal, the dust load in the
process gas does not influence the analytical result. By applying a dynamic background
correction, measurements can be carried out without any negative impact.
The influence of a high dust load is extremely complex, and depends on the optical path
length and particle size. The optical damping increases exponentially at longer path lengths.
Smaller particles also have a very large influence on the optical damping. With high dust
load, long path length and small particle size, the technical support at Siemens AG should be
consulted.
Temperature
The temperature influence on the absorption line is compensated by the software. A
temperature signal should be fed into the analyzer from an external temperature sensor. The
signal is then used for mathematical correction of the influence of the temperature on the
observed line strength. If the process gas temperature remains constant, a static correction
can be carried out as an alternative. Without temperature compensation, the relative error
caused by changes in the gas temperature has an extensive effect on the measurement.
An external temperature signal is recommended in most cases.
Pressure
The process gas pressure can affect the line shape of the molecular absorption line. For
known pressure values, the SITRANS SL uses a special algorithm to adapt the line shape.
Additionally, an external pressure signal can be fed to the analyzer to provide complete
mathematical compensation for the pressure influence including the density effect
(depending on application and gas).
An external pressure signal is recommended in most cases.
Interferences
The SITRANS SL is able to measure the desired gas components very selectively. In special
cases, the composition of the process gas might have an influence on the shape of the
absorption lines. This influence is compensated by analyzing the full shape of the detected
signal curve applying specific algorithms.
24
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Description
2.5 Functional description
Optical path length
As a result of Beer-Lambert's law, the absorption of laser light depends on the optical path
length within the gas. Therefore the precision of the optical path length measurement has an
effect on the precision of the total measurement.
Since the sensor optics on the process side usually have to be purged to keep them clean
for a longer period, the extent of the mixed zone between the purging medium and the
process gas as well as the concentration distribution of the latter must be considered. In a
typical in-situ installation with an optical path length of several meters, the influence of the
purging gas on the effective path length can be ignored.
The path length and dust load are mutually influencing: the higher the dust load in the
process, the shorter the max. possible path length.
The transmitter and receiver units are mounted on process flanges provided by the
customer. Correct alignment of these flanges must be guaranteed, e.g. by using the optional
sensor alignment kit.
Adjustment of the sensor pair
The process flanges of the SITRANS SL must be correctly aligned so that the laser beam
generated by the transmitter hits the photodetector in the receiver unit. This is guaranteed in
that the transmitter and receiver units have a curved surface integrated in the flanges. The
adjustment is carried out by shifting the flanges on these surfaces, through which the
symmetry axis is aligned. The axis can be offset by ±1 degree, which means that the
process flanges must be welded onto the process wall with at least this accuracy - see
following figure.
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Process wall
Figure 2-8
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Process flange
Installation adjustment requirements for the pair of cross-duct sensors
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
25
Description
2.5 Functional description
Purging
The easiest way to avoid condensation and dust deposits on the sensor windows is to purge
them, e.g. with air. Purging must be selected depending on the application. The transmittedlight sensors can therefore be configured for the respective situation.
The purging gas must not contain any concentrations of the measurement component. The
presence of the gas in the sensor heads or the purging tubes may influence the measured
concentration.
Recommendations for suitable purging and quality requirements of the purging gases can be
obtained from chapter Technical data (Page 181)
①
②
③
④
Purging tube
Process flange (customer)
Inlet for purging on the process side
Outlet for purging on sensor side
if applicable
Figure 2-9
26
⑤
⑥
⑦
⑧
Transmitter or receiver unit: optics tube
Transmitter or receiver unit: sensor head
Inlet for purging on sensor side if applicable
Process interface
Arrangement for purging on the sensor side of the SITRANS SL
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Description
2.5 Functional description
Purging on process side
For purging on the process side, the flow of purging gas can be adjusted between 0 and
approx. 50 l/min at each sensor head using a needle valve (included in delivery).
Purging tubes
The purging media used on the process side flows through the purging tubes into the
process gas stream. The tubes extend into the process area by a few centimeters, usually
perpendicular to the process gas stream. The effective measuring path in the process gas is
defined as the distance between the ends of the two purging tubes. The standard length of
the purging tubes is 340 mm. To enable sufficient pivoting, the process wall should be max.
150 mm thick.
O
①
②
Purging tube
l
Path length
Process wall
Figure 2-10
Measurement of the optical path length between the ends of the purging gas tubes
Purging on sensor side
Purging of sensors is always required for applications with oxygen as gas to be measured.
The sensors are then continuously purged with nitrogen. The flow of purging gas required in
this case is stated in the Technical data (Page 181).
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
27
Description
2.5 Functional description
2.5.3
Maintenance and fault messages
The SITRANS SL carries out continuous self-monitoring, and outputs alarms and warnings
to indicate maintenance requirements or a system fault. The information is output as plain
text on the LUI display, where symbols identify the category and the severity of the fault.
Alarm categories:
● Maintenance (system must be cleaned or repaired)
● Process value (problem with external sensor, or process conditions outside the
permissible range for SITRANS SL)
● Configuration (SITRANS SL is not correctly configured)
Severity:
● Fault (measurements could not be carried out)
● Warning (measurements may be inaccurate, or the system will soon shut down
measuring mode if an intervention is not made)
● Advanced warning/information (measurements are carried out)
The two binary (relay) outputs can be configured freely for the alarm output.
The response of the analog outputs in the event of an alarm is configurable; possible actions
are:
● Off (current measured value is displayed)
● Last measured value (freezing of last value displayed)
● Standard level (setting to predefined value)
● 3 mA (Namur NE43 fault status)
In addition, the transmission is available as an output variable.
Note
Specific requirements for the measuring point might require the utilization of special sensor
equipment. The possibilities for adapting the sensors are:
 Special materials for purging tubes (on request)
 Various types/sizes of sensor flanges
 Ex-proof sensor configurations
28
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Description
2.5 Functional description
2.5.4
Essential characteristics
● Long-term stability through use of an internal reference cell; calibration interval at least
one year.
● Dynamic background correction for varying dust loads.
● Isolated analog signal outputs of 4 to 20 mA.
● Menu-driven operation.
● Selectable time constants (integration time).
● Password-protected user interface.
● I/O operation in accordance with NAMUR recommendations.
● Monitoring of overall optical transmission.
● Sensor enclosure resistant to wear and corrosion.
● Local operation using remote-control unit with numeric keypad and menu prompting.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
29
Description
2.6 Product characteristics
2.6
Product characteristics
Device-specific characteristics
SITRANS SL is designed for measurement of various gases. Details can be obtained from
chapter Technical Data, standard applications section
Transmission
The system will have full performance when the transmission is within the range of
1 to 100 %.
Dust load
The characteristics of the dynamic changes of optical visibility due to dust including
turbulences is defined by the measurement situation. The influence of dust on the
measurement is very complex and depends on the path length and particle size distribution,
which in many cases is not known. Therefore no general limit for dust load can be given.
However, the SITRANS SL is designed to function without interruptions even at low optical
transmission. The experience indicates that the SITRANS SL systems can measure even at
quasi-static changes of the received optical power of at least 30 dB. This corresponds under
certain conditions to dust loads of up to 100 g/Nm3 at a path length of 1 m.
Gas analyzer functions
The SITRANS SL can be operated as an independent unit providing the following functions:
● Output signals
The analyzer can output two measurement values:
– gas concentration and
– optical transmission level (through the measuring volume).
● Alarm functions
The analyzer provides alarms/warnings for:
– Transmission drop-off
– Signal quality (if transmission is not sufficient as quality indicator)
– Warnings for system deviations before actual error occurs
– Alarms at system failure.
● Measurement inputs
The analyzer needs to use readings from other sensors to compensate the measured
concentration for varying temperature and pressure. If needed for future applications, it is
also possible to compensate for interference from another gas component.
● Local User Interface (LUI)
The LUI display is located in the receiver housing unit with a back light LCD visible
through a window in the housing lid. It is operated using the IR remote control. The
remote control is safe to use even in a hazardous environment.
30
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
3
Application planning
3.1
Cable selection recommendations
Cable selection recommendations
Note
 For a normal (non Ex) setup of SITRANS SL the cables are not part of the standard
delivery and should be ordered as an accessory.
 An Ethernet cable may be permanently connected via the receiver junction box. Ethernet
is needed for service and maintenance work. A permanently connected cable is
recommended when the SITRANS SL is located at an inconvenient physical location.
 With the receiver junction box mounted, the Ethernet jack inside the receiver unit may not
be used, unless the wires connected to the Ethernet screw terminals inside the receiver
housing have first been disconnected.
You can select your cable according to your requirements from the following table for
standard non-Ex analyzers SITRANS SL.
● Suitable connection cables shall be selected depending on the electric interface used.
● The connection cable must provide both power and ground to the analyzer.
● Ethernet cables shall be of type CAT-5, or better, with a shield (FTP or STP).
Cabling guidelines
Sensor connection cable
Connection cable
Shield
Yes, required
Yes, required
Configuration
Twisted Pairs
Twisted Pairs recommended
Number of conductors


4 x 2 or

2x2+3
(2 pairs for comm. & synch + 3 for

power and ground)

Full connection;
analog + Modbus: 10x2 (twisted
pair)
PROFIBUS: 1 x 2 + 4
(PROFIBUS DP hybrid cable)
Modbus: 1 x 2 + 3 or
3 x 2 (twisted pair)
Conductor cross
section
Minimum 0.34 mm2
Minimum 0.34 mm2
(Consider voltage drop for too long
cables)
Cable diameter
8 ... 12 mm with provided cable gland


SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
8 ... 12 mm with provided small
cable gland
13 ... 18 mm with provided large
cable gland
31
Application planning
3.2 Network and system integration
3.2
Network and system integration
3.2.1
Overview
The communication interface of SITRANS SL can be configured for transfer and processing
of the measurement data as follows:
● Analog I/O and digital I/O system configuration;
● PROFIBUS DP system configuration;
● Modbus system configuration.
The system configuration of the SITRANS SL is defined according to the communication
code within its order number.
Note
Setup of the SITRANS SL can be done via the local user interface LUI, or for service
engineers, via the LDSComm software. LDSComm communicates with SITRANS SL via
Ethernet using the TCP/IP protocol. The connection can be established locally or via modem
dial-in using the remote service kit which is available as accessory.
See also
Cable selection recommendations (Page 31)
32
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Application planning
3.2 Network and system integration
3.2.2
Analog I/O and digital I/O system configuration
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Example of a system configuration with analog I/O and digital I/O
System features:
● The SITRANS SL is controlled by the automation system via analog I/O and digital I/O.
● The measurement results of the SITRANS SL are output to the automation system via
analog output.
● The digital outputs can be used to indicate warnings and alarms and the digital input can
be used to evaluate errors of external pressure or temperature sensors.
● When external sensors are to be connected the first choice is to use analog input of the
automation system although direct connection via the analog input of SITRANS SL is also
possible.
● A PC/PG used for the configuration of the automation system is connected to an
automation system via an MPI cable.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
33
Application planning
3.2 Network and system integration
Necessary equipment
Hardware
Name
Comment
SITRANS SL
Analyzer
PLC (e.g. S7-315-2DP)
Automation system
Analog configuration
From automation system to analyzer
Siemens SIMATIC MPI Cable
For PLC configuration
I/O-module (e.g. SM374) – in/out16 (optional)
For connecting external sensors
External sensors (optional)
For process gas temperature and pressure
Software
34
Name
Comment
Automation system software (e.g. SIMATIC
Manager Step 7)
For automation system configuration
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Application planning
3.2 Network and system integration
3.2.3
PROFIBUS DP system configuration
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Example of a system configuration with PROFIBUS DP
System features:
● The SITRANS SL is controlled by the automation system via PROFIBUS DP.
● The measurement results from the SITRANS SL are output to the automation system via
PROFIBUS DP.
● When external sensors are to be connected the first choice to do so is to use PROFIBUS
DP although connection via analog input of the automation system is also possible.
● A PC/PG used for the configuration of the automation system is connected to this
automation system via an MPI cable.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
35
Application planning
3.2 Network and system integration
Necessary equipment
Hardware
Name
Comment
SITRANS SL
PROFIBUS Slave
PLC (e.g. S7-315-2DP)
PROFIBUS Master
PROFIBUS Cable
For PROFIBUS Master – Slave configuration
Siemens SIMATIC MPI Cable
For PLC configuration
External sensors (optional)
For process gas temperature and pressure
Software
36
Name
Comment
PROFIBUS system software (e.g. SIMATIC
Manager Step 7)
For automation system configuration
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Application planning
3.2 Network and system integration
3.2.4
Modbus system configuration
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Example of a system configuration with modbus
System features:
● The SITRANS SL is controlled by the automation system via Modbus.
● The measurement results of the SITRANS SL are output to the automation system via
Modbus.
● When external sensors are to be connected the first choice is to use Modbus although
connection via the analog input of SITRANS SL is also possible.
● A PC/PG used for the configuration of the automation system is connected to this
automation systemvia an MPI cable.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
37
Application planning
3.2 Network and system integration
Necessary equipment
Hardware
Name
Comment
SITRANS SL
Modbus Slave
PLC (e.g. S7-315-2DP)
Automation system
Modbus module CP442-5
Modbus Master
Modbus Cable
For Modbus Master – Slave configuration
Siemens SIMATIC MPI Cable
For PLC configuration
External sensors (optional)
For process gas temperature and pressure
Software
Name
Comment
Modbus system software (e.g. SIMATIC Manager For automation system configuration
Step 7)
See also
Screw terminals (Page 48)
38
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
4
Installing
4.1
Safety information
Electric safety
WARNING
It is essential that you observe the given information and warnings!
Failure to do may result in death, severe injuries, and/or damage to equipment and
environment.
The analyzer SITRANS SL meets all regulations specified in the present EU regulations
(LVD regulation 2006/95/EC and EMC regulation 2004/108/EC) as well as those of the
American market (FM approved version available).
Laser safety
SITRANS SL is classified as a class 1 laser product. The emitted laser light is invisible (near
infrared) and not hazardous to the unprotected eye. SITRANS SL has warning labels at
appropriate positions according to EN 60825-1:2007.
WARNING
Heat safety
Some metal parts and piping placed near the sensors might be at elevated temperatures
due to high temperature purging - either from steam or from air.
To avoid severe burns these parts must either be isolated or equipped with protective metal
sheets. Always use protective gloves in the vicinity of such hot parts.
WARNING
Pressure safety
It is possible to mount the SITRANS SL to processes with elevated pressure. Although the
window of the process interface is burst-tested up to 8 MPa (80 bar), the customer should
define a safety factor appropriate to his application.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
39
Installing
4.2 Mounting
Outdoor cabling
Note
If cables are to be installed outdoors an UV protection shall be considered. A UV protective
hose for outdoor use is available as accessory (see list of accessories in chapter
(Page 193))
Liability
Following commissioning, the total responsibility is with the owner.
4.2
Mounting
4.2.1
Mounting conditions
During operation the permissible ambient temperature as stated in the must not be
exceeded. If the unit is exposed to direct solar radiation ensure that the total temperature will
not exceed the maximum permitted temperature. If these conditions cannot be fulfilled the
SITRANS SL must be installed in a cabinet with a controlled environment.
CAUTION
Avoid condensation
As condensation is normally a problem when moving the device from outdoor to the inside
of a building, the device should be adapted to the new ambient conditions for a couple of
hours before starting it.
NOTICE
The front (lid) side of the units must be accessible. To facilitate maintenance and service
there shall be at least 60 cm of free space in front of SITRANS SL transmitter and receiver
respectively. To meet the safety requirements for air convection and cooling there must be
a free space of at least 10 cm around the SITRANS SL.
Supply voltage
When the supply voltage is interrupted for more than 20 ms the unit performs an automatic
restart. 120 sec after the restart the unit works properly again.
With a slow rise of supply voltage the unit may stop working. A manual restart may be
necessary.
40
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.2 Mounting
4.2.2
Preparations
CAUTION
Risk of damage due to high temperature
The temperature on the process side of the wedge window must not exceed 200 °C
(392 °F).The maximum permissible temperature of the flange is 70 °C (158 °F). For these
applications we recommend a process-side purging with a permanent temperature
monitoring.
Before the sensor can be installed at the measurement point, process flanges have to be
welded onto the measuring site. The flanges must be compatible with DN50/PN10-40 or
ANSI 4"/150 lb with a minimum inner diameter of 50 mm. The flanges must protrude at least
150 mm from the wall and 0-30 mm into the furnace or funnel. Flange tubes should never be
longer than the purge tube which has a standard length of 340 mm.
If longer flange tubes are needed for any reason customized purging tubes (longer) have to
be used. If you require further information, you can request the required information from
your Siemens contact person. You will find details of your local contact persons over the
Internet. For details see Service and support (Page 201)
①
②
③
④
⑤
⑥
⑦
Customer flange
SITRANS SL flange
In-line reference cell
Gas outlet for the sensor purging
SITRANS SL body (TTU - Transmitter Tube Unit or RTU - Receiver Tube Unit)
SITRANS SL housing (THU - Transmitter Housing Unit or RHU - Receiver Housing Unit)
SITRANS SL lid
Figure 4-1
Receiver unit exploded
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
41
Installing
4.2 Mounting
At installation of the SITRANS SL, the laser and the photo-detector have to be aligned to the
optical axis of the sensor pair. Note that each sensor has an optical axis of its own which is
its axis of symmetry. In addition the sensor body is at an angle to this axis. The reason for
this is that the laser beam passes a wedged window before exiting. This wedge window will
refract the beam approximately 1.5°. The following figure illustrates this.
º
ar
①
②
Axis of symmetry for sensor (optical axis)
Axis of symmetry for sensor body
Figure 4-2
Symmetry axes
The sensors are equipped with a flange pair called process interface to align both optical
axes to one another. In this way an angle error of up to ± 1° on each side can be
compensated.
See also
Service and support (Page 201)
42
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.2 Mounting
4.2.3
Installation of process flanges
Preparation
The amount to which the axis can be adjusted is ± 1° which means that the process flanges
must be welded on the process wall to each other with this accuracy or better - see the
following figure.
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Process wall
Process flange
Figure 4-3
Flange alignment
To be able to set the correct path length in SITRANS SL the dimension A in the 'Flange
alignment' figure has to be measured after the flanges are mounted. The total length of the
purging tube (dimension B), including the process flange must also be known.
The path length can now be calculated as A - 2B.
CAUTION
Failure to weld the process flanges within ±1° of the symmetry axis of the flange pair will
result in the impossibility to align the sensor pair.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
43
Installing
4.2 Mounting
4.2.4
Installation of the sensors
Device position
The SITRANS SL may be mounted in any direction.
When mounting the sensors the large springs of the alignment flanges must face
downwards.
Proceed as follows:
1. Check that the flanges are installed properly.
2. Mount the receiver and transmitter, both with gaskets on the flanges and cross-tighten
the bolts.
3. Align the sensors as described in section Alignment of SITRANS SL (Page 57).
CAUTION
Do not install sensors that require purging before the purging media is accessible. Never
leave a purged sensor with the purging media switched off since the process windows
can be easily damaged.
Note
The stability of the sensor alignment depends on the stability of the construction to which
the customer’s flange is mounted. If the incinerator wall or smoke duct is subject to
movements due to, for instance, thermal changes the sensors will need repeated
realignment. This can be avoided by mounting the sensor pair on an external, more
stable base, such as a concrete or steel support.
See also
Technical data (Page 181)
44
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.2 Mounting
4.2.5
Installation of the purging tubes
Note
The purging tubes are unsymmetrical with slanted ends and must be mounted such that the
larger side of the tube end points against the direction of the process flow.
The purging tubes ① are mounted by clamping the purging tube flange ⑤ between the
customer flange ② and the SITRANS SL process interface ④. The sealing is accomplished
by the two process gaskets ③ as shown in the following figure.
When using an ANSI 4"/150 lbs process interface the purging tubes ① have to be clamped
between the ANSI 4" adapter flange delivered with the system and the process interface ④.
①
②
③
④
⑤
Purging tube
Customer flange
Process gaskets
Process interface
Purging tube flange
Figure 4-4
Purge tube mounting
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
45
Installing
4.3 Electric connections non Ex
4.3
Electric connections non Ex
EMC and NAMUR
The following must be observed regarding EMC and NAMUR:
CAUTION
This is a Class A product. In a domestic environment this product may cause radio
interferences in which case the user may be required to take adequate remedial measures
Operating SITRANS SL
Since the device is delivered without cabling the user must provide this. An appropriate cable
layout is described in section 3.1.
The cables have to be connected according to the table in section 4.5.3.
The following must be observed when operating SITRANS SL:
WARNING
Never switch on or operate an analyzer with the lid open.
The protective earth terminal of the SITRANS SL needs to be connected to the local
potential equalization system.
See also
Connecting cables (Page 52)
Cable selection recommendations (Page 31)
46
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.3 Electric connections non Ex
4.3.1
System set-up (non Ex only)
Install the cables in the transmitter sensor and receiver sensor according to the following
figures.
Non Ex version with sensor connection cable kit
①
Transmitter housing
⑨
②
Transmitter tube unit
Customer flange (not included)
⑩,
⑪
⑬
⑭
Purging tube (accessory)
Sensor connection cable kit (accessory) consisting of
③
④
⑤
⑥
⑦
⑧
Process interface
Receiver tube unit
Receiver housing
Connection cable (accessory)
Figure 4-5
Large cable gland (for cables with a diameter of
13 ... 18 mm)
Small cable gland (for cables with a diameter of
8 ... 12 mm)
Reference cell inside the receiver unit
Remote control
⑫ Sensor connection cable
⑮ Receiver junction box
⑯ Receiver junction box cable
⑰ Cable gland for Ethernet cable
Connection of a non Ex system using a sensor connection cable kit
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
47
Installing
4.3 Electric connections non Ex
4.3.2
Screw terminals
Receiver housing
CAUTION
Damage to the equipment
Damage to the equipment may result from short-circuit. No conductors of a cable may be
left unconnected inside the SITRANS SL receiver or transmitter. Any unused conductor
must be connected to the analyzer housing.
NOTICE
No Ethernet connection possible
If Ethernet is connected to a permanently installed cable, the Ethernet jack inside the
receiver may not be used. Before using the Ethernet jack inside the receiver, ensure that no
cable conductors are connected to the Ethernet screw terminal in the receiver.
48
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.3 Electric connections non Ex
①
Infrared receiver for remote control
④
②
③
Diagram circuit terminals
Buttons for LUI navigation
⑤
⑥
Figure 4-6
Terminals
Ethernet connection
Control panel with switch for termination resistor in receiver housing
',*287
',*287
9,1
',*,1
&RP
9287
Switch for termination resistor for
PROFIBUS und Modbus
&RP
6\QF
6\QF
7[
&20081,&$7,21
7[
5[
(7+(51(7
$1$287 $1$287
352),%86
136KLHOG
5[
$1$,1
$1$,1
*1' *1'
6HQVRUFRQQHFWLRQFDEOH
Figure 4-7
Diagram circuit terminals
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
49
Installing
4.3 Electric connections non Ex
Transmitter housing
①
Terminals
Figure 4-8
1&1&
66
Figure 4-9
50
Transmitter board with terminals
66 66
Transmitter circuit terminals
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.3 Electric connections non Ex
①
Receiver junction box cable
Figure 4-10
8 9 10 11
7
6
5
4
2
1
3
2
1
3
4
5
6
7
8 9 10 11
Receiver junction box
②
Junction box
Receiver junction box cable and junction box
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
51
Installing
4.3 Electric connections non Ex
4.3.3
Connecting cables
Sensor connection cable
The sensor connection cable connects the receiver and the transmitter of the SITRANS SL.
The sensor connection cable is used to transfer:
● 100 kbps RS-485 communication and synchronization
● power for the transmitter
● ground.
Table 4- 1
Electric connections for sensor connection cable, valid for non Ex product versions
Screw terminals on junction board
52
Function / Power
Receiver
Transmitter
L1
S1
+
L2
S2
-
L3
S3
Com+
L4
S4
Com-
L5
S5
Sync+
L6
S6
Sync-
Chassis
Chassis
Ground
Chassis
Chassis
Ground
24 V DC power supply to transmitter unit
RS485 communication
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.3 Electric connections non Ex
Receiver junction box Ex-e
Note
The junction box of the receiver unit is the same for both ATEX applications and sensor
connection cable kit for non Ex applications.
Table 4- 2
Electric connections for receiver junction box cable of sensor connection cable kit
(accessory)
Conductor color
Connector position in
junction box
Remarks
Red
1
+
Blue
2
-
Pink
3
Com +
Grey
4
Com -
White
5
Sync+
Brown
6
Sync -
-
7
NC
Grey-Pink
8
Tx +
Red-Blue
9
Tx -
Black
10
Rx +
Violet
11
Rx -
Green
PE terminal
Yellow
PE terminal
Shield
Gland
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
24 V DC power supply for
transmitter unit
RS485 communication
Ethernet connection
53
Installing
4.3 Electric connections non Ex
Connection cable
Table 4- 3
Electric connections for analog I/O and Modbus connection cable, valid for non Ex
product versions
Terminals in receiver junction board
+
2
-
3
Closed when energized 4)
Digital OUT 0 (relay)
30 V, 0.5 A 3)
Closed when energized 4)
Digital OUT 1 (relay)
30 V, 0.5 A 3)
7
+
8
-
Digital IN 0
0 ... 30 V DC 2)
9
+
10
-
11
+
12
-
13
Modbus D1 (RxD/TxD_N - data
inverted))
14
Modbus D0 (RxD/TxD_P - data not
inverted)
15
Modbus Shield
16
Tx+
5
6
17
Tx-
18
Rx+
19
Rx-
20
+
21
-
22
+
23
-
Ethernet cable
Supply voltage
19 ... 30.2 V DC, 10 VA 1)
1
4
54
Function/Power
Analog OUT 0 (Measurement)
30 V DC, 24 mA 3)
Analog OUT 1 (Measurement)
30 V DC, 24 mA 3)
RS-485 Modbus
- 7 ...+ 12 V DC
White/Orange
Ethernet 5)
Orange
White/Green
Green
Analog IN 0 (Temperature)
0 .. 30mA 2)
Analog IN 1 (Pressure)
0 ... 30 mA 2)
24
Ground
25
Ground
Chassis
Ground
Chassis
Ground
Shield
1)
Maximum possible power consumption.
2)
Maximum input values.
3)
Maximum output values. The following figures show how the outputs are used.
4)
Supported relay modes: "Normally Energized" (default), "Normally De-Energized". For
configuration, see Configuration (Page 116).
5)
We recommend not to connect the connection cable directly to Ethernet connectors.
Instead the sensor connection cable kit should be used for this purpose.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.3 Electric connections non Ex
Table 4- 4
Electric connection for PROFIBUS connection cable (accessory)
Conductor color/no.
Connector position
(Receiver junction board)
Remarks
Function
1 (black)
1
+
Supply voltage
19 ... 30.3 VDC, 10 VA
2 (black)
Chassis
Red
13
A line
RS 485
Green
14
B line
communication
3 (black)
2
-
Supply voltage
19 ... 30.3 VDC, 10 VA
4 (black)
Chassis
Shield wire
15
PROFIBUS DP
shield
Details to PROFIBUS connection and operation can be obtained from Section (Page 129)
Example: Digital out 0
&XVWRPHUVLGH
,PHDV
9
5ORDG
Figure 4-11
!6,75$166/
Using digital output
● V0 can be maximum 30 V DC.
● Rload must be minimum 60 Ω (max. 0.5 A in the relay).
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
55
Installing
4.3 Electric connections non Ex
Example: Analog out 0
&XVWRPHUVLGH
,PHDV
9
5ORDG
Figure 4-12
!6,75$166/
Using analog output
● V0 must be minimum 7.5 V and maximum 30 V DC.
● Rload can be maximum ((V0 – 7.5 V)/0.025 A) Ω.
Note
SITRANS SL provides no supply voltage for the analog outputs, i.e. the analog outputs of
the SITRANS SL are passive and thus must be powered externally!
56
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.4 Alignment of SITRANS SL
4.4
Alignment of SITRANS SL
Both sensors of the SITRANS SL have to be aligned such that the laser beam from the
transmitter hits the photo detector in the receiver. To facilitate this both transmitter and
receiver have a spherical surface incorporated in the flanges. The alignment is done by
adjusting the position of the flanges on this surface by means of two adjustment screws and
thus pointing the axis of symmetry - see following figure.
①
③
Center of alignment
Flange with concave spherical surface
Figure 4-13
②
④
Flange with convex spherical surface
Spherical surface
Alignment sphere
WARNING
Danger of explosion
The SITRANS SL alignment kit is not suitable for use in hazardous areas. Therefore it must
never be used in a hazardous area except with an approval of the plant manager (hot work
permit)!
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
57
Installing
4.4 Alignment of SITRANS SL
4.4.1
Alignment kit
Note
The alignment kit is not part of the delivery. If you commission the analyzer yourself, you
need to order the alignment kit additionally.
The alignment kit is necessary to align SITRANS SL. It consists of:
● a light source
● an alignment tool consisting of
– aiming tool base
– fine aligning unit
● an coarse alignment unit
● a lens hood
● an Allen key for the alignment of the sensors
● two wrenches to secure/release the clamp ring:
– one for the clamp ring,
– one to prevent the adapter on the process interface to get loose when the clamp ring
is secured
● a tube of lubricant for the threads to prevent them form getting stuck.
①
②
③
④
Thread lubricant
Alignment tool
Hook wrenches
Light source
Figure 4-14 Alignment kit
⑤
⑥
⑦
⑧
4 Batteries LR 6 1.5 V
Allen key
Coarse alignment unit
Lens hood
See also
Accessories (Page 193)
58
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.4 Alignment of SITRANS SL
4.4.2
Alignment procedure
CAUTION
Alignment procedure
Correct alignment is crucial for proper operation of the analyzer. The alignment procedure
has to be carried out with utmost care.
1. Before mounting the alignment kit, make sure that the contact surface between flange
and the alignment kit is clean.
2. During the adjustment procedure make sure that you have obtained the smallest
possible focal spot and that it is positioned at the very center of the crosshair.
3. Before remounting the sensors make sure that the contact surfaces between sensors
and flanges are clean.
The aim of the alignment procedure is to provide a collinear optical axis of both receiver unit
and transmitter unit. To do so first align the receiver to the transmitter and then align the
transmitter to the receiver.
To align a sensor, a point light source is mounted to the flange on the opposite side of the
sensor to be aligned, and the alignment optics is mounted to the flange of the sensor. This
flange is aligned by centering the projected image of the point source to the center of the
cross hair of the alignment tool.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
59
Installing
4.4 Alignment of SITRANS SL
The complete procedure for the alignment is described as follows starting with the receiver
side.
Note
It is also possible to start with the transmitter side but it is always necessary to align both
sides.
1.
Release the clamp ring on
the RTU (receiver tube unit)
using the wrenches.
Support the receiver when
releasing.
60
2.
Remove the receiver unit
3.
Attach the light source and
switch it on
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.4 Alignment of SITRANS SL
Now go to the transmitter
side!
4.
Release the clamp ring on
the TTU (transmitter tube
unit) using the wrenches.
Support the transmitter when
releasing.
5.
Remove the TTU.
6.
Remove the fine aligning unit
from the aiming tool base by
loosening the securing screw
without taking it off. Carefully
slide the fine aligning unit out.
Attach the aiming tool base.
Orient the screw of the
aiming tool towards the
purging inlet such that they
form one line (arrows in
adjacent figure).
7.
Start with the coarse aligning
unit. Slide it into the aiming
tool base.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
61
Installing
4.4 Alignment of SITRANS SL
8.
Now you will see a light spot
from the light source,
provided it is turned on.
Focus by moving the outer
part as indicated in the
adjacent figure until you get
the smallest and sharpest
possible spot. The size of the
square spot depends on the
distance between the
receiver and the transmitter;
the longer the path the
smaller the spot.
Use the lens hood to
suppress ambient light for a
better visibility of the focused
light.
9.
Align the transmitter using the
supplied Allen key by turning
the two screws without
springs until the focused spot
appears in the center of the
crosshair.
Do not turn the screws with
the springs!
10. Remove the coarse aligning
unit and replace it with the
fine aligning unit.
Verify if the target of the fine
alignment unit is orientated
such that the "B" axis points
to the purging inlet of the
flange.
62
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.4 Alignment of SITRANS SL
11. Now you will see a bigger
light spot from the light
source. Focus by moving the
outer part as indicated in the
adjacent figure until you get
the sharpest possible spot.
12. Align the transmitter using
the supplied Allen key until
the focused spot appears in
the center of the crosshair
corresponding to your
SITRANS SL variant in the
following table:
MLFB no.
Target
7MB6221-?AB..
7MB6221-?AC..
7MB6221-?AD..
7MB6221-?JC..
B
B
B
A
13. Change places of the aiming
tool and the light source and
repeat the procedure with the
receiver starting at step 7.
If this is done correctly the sensor pair is now aligned and should stay so even when the
sensor bodies are removed and put back again. The system is designed to stay aligned even
if a new receiver/transmitter unit is installed as replacement of an existing one.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
63
Installing
4.5 Purging
4.5
Purging
The easiest way to avoid condensation and dust deposits on the sensor windows or
excessively high thermal load of the windows and the sealing material as well as the sensor
electronics is to purge them, e.g. with air. Purging must be selected depending on the
application. The sensors can therefore be configured for the respective situation.
There are two different types
● Purging of optical process interfaces
● Purging of sensors.
Note
Not all purging options are available to all applications. Please refer to the specification of
each application for details.
4.5.1
Sensor side purging
For some applications (e. g. oxygen) purging of the sensors is necessary. In this case a
needle valve and an exit aperture must be mounted on the sensors. The exit aperture is
used to build up a slight overpressure inside the sensor to enable the purging gas to
penetrate all relevant areas within a short time during all measurements.
The purging gas must not contain any concentrations of the measurement component. The
presence of the gas in the sensor heads or the purging tubes may influence the measured
concentration. In oxygen measurements it is necessary to purge the sensor with an oxygen
free gas, such as nitrogen.
When measuring CO also purging of the sensor may be considered. Normally the CO
content in standard air is lower than the detection limit of SITRANS SL. Nevertheless, the
CO content may be higher inside buildings and industrial plants due to exhalation or
combustion processes. In this case sensor purging is necessary.
CAUTION
When the sensor purging is connected to the process purging, it may be necessary to use
non-return valves to ensure no process gas can enter the purging gas line in the event of
failure of the purging gas supply. This applies especially in the case of cascaded process
and sensor purging where there is otherwise the danger that, for example, corrosive
process gases could enter the sensor enclosure.
64
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Installing
4.5 Purging
Note
When continuous purging is needed, make sure that the purging gas rate is 3 to 5 l/min. This
rate assures that there is time enough to flush all measurement components out of the
sensor. Purging with nitrogen on the sensor side is almost always necessary for O2
applications to avoid an offset caused by the oxygen of the air present in the unit. The cells
in the sensor head are then continuously purged with nitrogen. Particularly when (re)starting
the SITRANS SL O2, a sufficiently high flow of purging gas of approx. 3 to 5 l/min must be
provided for several minutes to ensure that all residues of oxygen are displaced. The flow of
sensor purging gas can subsequently be set to a lower value using the needle valve
(included in delivery).
4.5.2
Process side purging
This function is optional. With this option a needle valve is supplied with the analyzer. It is up
to the customer to mount it on the process interface.
WARNING
Observe that the use of this needle valve opens up into the process. The process must be
permanently monitored if it is under pressure. If any danger for personnel or equipment can
arise from the over pressurized process we recommended to mount a check valve on the
process interface to prevent flow out from the process.
Make sure that under no circumstances the process gas will intrude into the purging
system. This applies particularly to a cascaded sensor and process purging which
otherwise may lead to ingress of corrosive process gases.
CAUTION
Always install the purging system before you install the sensors to avoid damage to the
optics during the rest of the installation process. For optimal results use sensors equipped
for the specific purging type, supplied by Siemens AG.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
65
Installing
4.5 Purging
4.5.3
Purging set-up
Mount the purging connectors according to the following procedure (see the following figure):
1. Remove the plugs from the RTU/TTU and the process flange.
2. Mount the needle valves and the exit aperture.
3. Attach a piece of 6 mm tubing to the needle valves and route it to an appropriate purging
gas source.
CAUTION
Make sure that the purge gas quality is sufficient to avoid rapid degradation of the
visibility in the optical path.
①
②
③
④
Purging tube
Process flange
Process purging input
⑤
⑥
⑦
⑧
RTU or TTU (Receiver or transmitter tube unit)
RHU or THU (Receiver or transmitter house unit))
Needle valves
Sensor purging output
PI (Process interface)
Figure 4-15 Sensor purging input with needle valve
Note
When using a plastic tube for connecting the purge gas supply, be sure to use the supplied
rigid metal insert.
66
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.1
ATEX
5.1.1
Safety information
5
Electric Safety
The SITRANS SL ATEX version is delivered with an approval for use in hazardous
environments in which explosive gases are in use.
WARNING
Observe the specifications of the examination certificate valid in your country. Observe the
laws and regulations valid in your country for the electric installation in hazardous areas
with risk of explosion. In Germany these are for example:
-- Regulations for installation of electric equipment in hazardous areas, DIN EN 60079-14.
Check whether the available power supply is compliant with the power supply specified on
the type plate and specified in the examination certificate valid in your country.
WARNING
Open cable inlet or incorrect cable gland
Danger of explosion.
Close the cable inlets for the electric connections. Only use cable glands or plugs which are
approved for the type of protection "Flameproof enclosure Ex d".
When using a conduit system, you must provide an ignition lock-out at a maximum distance
of 46 cm (18") from the device inlet. Screw in the conduit with at least four turns of the
thread.
Observe the specifications and laws with regard to the installation location of the device.
WARNING
Fix the safety mechanism for the lid.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
67
Explosion protection
5.1 ATEX
WARNING
Never switch on or operate an analyzer with lid open.
Before opening the device wait at least two minutes after de-energizing. Make sure that
externally powered signals also shall be de-energized.
For secure disconnection of all signals the device should be operated in hazardous areas
only via a switch-off unit placed outside the hazardous area.
WARNING
Never repair the device on site!
Any components not mentioned in the spare parts list must be replaced or repaired by
certified field service technicians. Failure to do so will also result in loss of Ex approval.
WARNING
Before switching on the analyzer make sure that the housing is closed and grounded.
The protective earth terminal of the SITRANS SL needs to be connected to the local
potential equalization system.
Death, personal injury and/or damage to property may result if this is not observed.
WARNING
The use of the alignment kit (A5E01000740) for aligning the sensors is not covered by the
ATEX certificate of the SITRANS SL analyzer.
Never use the kit in the ATEX zone without permission of the plant manager (hot work
permit).
WARNING
Never open the lid of an energized SITRANS SL system in the ATEX zone without
permission of the plant manager (hot work permit).
Death, personal injury and/or damage to property may result if this is not observed.
SITRANS SL ATEX meets all regulations specified in the present EU regulations (LVD
regulation 2006/95/EEC and EMC regulation 2004/108/EEC). The sensors may be used in
explosive areas as described in ATEX certificate PTB 08 ATEX 1008 X following regulation
94/9/EC.
68
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.1 ATEX
Materials in the sensor pair
The sensor pair (transmitter and receiver) is built mainly using stainless or surface treated
steel and Aluminium 231 (maximum magnesium content 0.5%). The O-rings and gaskets
used are made of FKM (fluorine-polymer) or FFKM (perfluoro elastomer). The process
interface consists of a borosilicate glass window and an O-ring made of FKM. If the gas
purging of the sensor will fail the O-rings will be the limiting component for the temperature.
They can withstand 215 °C/420 °F (FKM).
Pressure Safety
In some applications the process can be over pressurized. Normally this is not a situation
where the measurements will be adequate.
WARNING
The high pressure glass in the sensors must not be subject to any mechanical impact which
might cause damage to the glass (scratch, gash etc.). Only use a soft cloth for cleaning of
the glass. Make sure that it is safe to dismount the sensor before cleaning.
WARNING
Make sure all plugs and tube fittings are sealed with the enclosed pipe thread Sealant
(Swagelok MS-PTS-6). (Instructions given on the sealant tube must be carefully followed).
Approval
The concept of the ATEX approval is that the system is not modified and that special ATEX
approved cables and bushings are used. An absolute condition for the approval is that the
equipment is setup according to ATEX system set-up (Page 71) .
Liability
Following commissioning, the total responsibility is with the owner.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
69
Explosion protection
5.1 ATEX
5.1.2
Installation ATEX
The installation of the ATEX sensors can be performed by the customer provided the
instructions given in the certificate are fully observed.
CAUTION
The ATEX certificate is a system certificate and is only valid if SITRANS SL is installed
according to the instructions given in the certificate.
Note
SITRANS SL must be shut off and disconnected before reconnections are done.
①
Sensor housing lid locking screw
Figure 5-1
SITRANS SL ATEX installation
WARNING
The locking screw must be tightened or the ATEX approval will be violated
See also
Alignment procedure (Page 59)
70
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.1 ATEX
5.1.3
ATEX system set-up
The figure below shows the cabling of the transmitter and receiver sensors.
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Figure 5-2
Overview of the ATEX version of SITRANS SL
SITRANS SL is delivered with the cables already connected in the receiver and the
transmitter. The cable to the customer side is approximately 3 meters long and must be
connected in a junction box (not part of the delivery) in which the customer cable is joined to
the system. The sensor connection cable ⑮ is delivered in a standard length (5 m, 10 m or
25 m) and can be cut to a convenient length. The sensor connection cable is then connected
to two junction boxes which are mounted to the receiver and transmitter respectively.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
71
Explosion protection
5.1 ATEX
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
Manufacturer
CE marking
Datamatrix code
Country of origin
Measuring range
Figure 5-3
Serial number
Product version
Article number
Product name
Example: ATEX label SITRANS SL
NG
NI
R
A
W
Figure 5-4
Ex marking with Ex data
AIT
-W
IN
2M
BEFORE
OPENING A
FTE
R
DE
-EN
ER
GI
ZI
N
G
Warning label SITRANS SL
1/2" NPT
Figure 5-5
72
Thread size label SITRANS SL
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.1 ATEX
5.1.4
Electric connections in the ATEX system
The electric connections are done in two junction boxes between the receiver and the
transmitter and in one junction box connecting the customer cable. The connections inside
the unit housings are done in the factory before delivery and work here can only be done by
certified technicians.
The tables below illustrate the connections in the main junction box providing all in- and
output connectors to the SITRANS SL. The terminals as well as their assignment are
described in chapter Screw terminals (Page 48) .
Sensor connection cable
The sensor connection cable connects the junction boxes at the receiver and transmitter of
the SITRANS SL. This cable is used to transfer:
● 100 kbps RS-485 communication
● power for the transmitter
● ground.
Table 5- 1
Electric connection sensor connection cable, valid for ATEX product versions
Conductor color
Connector position
(Receiver junction box)
Connector position
(Transmitter junction box)
Remarks
Function
Red
1
1
+
Blue
2
2
-
24 V DC power supply to
transmitter unit
Pink
3
3
Com+
Grey
4
4
Com-
White
5
5
Sync+
Brown
6
6
Sync-
Green
PE terminal
PE terminal
Yellow
PE terminal
PE terminal
Shield
Gland
Gland
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
RS 485 communication
73
Explosion protection
5.1 ATEX
Receiver junction box cable
Table 5- 2
Electric connections for receiver junction box cable, valid for ATEX product versions
Conductor color
Connector position
(Receiver junction
board)
Connector position
(Receiver junction box)
Remarks
Function
Red
L1
1
+
24 V DC power supply to
transmitter unit
Blue
L2
2
-
Pink
L3
3
Com+
Grey
L4
4
Com-
White
L5
5
Sync+
Brown
L6
6
Sync-
Green
Chassis
PE terminal
Yellow
Chassis
PE terminal
Grey - pink
16
8
Tx+
Red - blue
17
9
Tx-
Black
18
10
Rx+
Violet
19
11
Rx-
Shield
Gland
Gland
RS 485 communication
Ethernet connection
Transmitter junction box cable
Table 5- 3
Electric connections for transmitter junction box cable, valid for ATEX product versions
Conductor color
Connector position
(Transmitter junction
board)
Connector position
(Transmitter junction box)
Remarks
Function
Red
L1
1
+
24 V DC power supply to
transmitter unit
Blue
L2
2
-
Pink
L3
3
Com+
Grey
L4
4
Com-
White
L5
5
Sync+
Brown
L6
6
Sync-
Green
Chassis
PE terminal
Yellow
Chassis
PE terminal
Shield
Gland
Gland
74
RS 485 communication
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.1 ATEX
Connection cable
Table 5- 4
Electric connections for connection cable analog and Modbus, valid for ATEX product versions
Conductor color
Connector position
(Receiver junction board)
Remarks
Function
Red
1
+
Supply voltage
Blue
2
-
19 ... 30,2 V DC, 10 VA 1)
Pink
3
Closed when
Digital Out 0 (relay)
Grey
4
energized 4)
30 V DC, 0.5 A 3)
White
5
Closed when
Digital Out 1 (relay)
Brown
6
energized 4)
30 V DC, 0.5 A 3)
Green
7
+
Digital In 0
Yellow
8
-
0 ... 30 V DC 2)
Black
9
+
Analog Out 0
Violet
10
-
30 V DC, 24 mA 3)
Grey - pink
11
+
Analog Out 1
Red - blue
12
-
30 V DC, 24 mA 3)
White - green
13
Modbus D1
(RxD/TxD_N)
Brown - green
14
Modbus D0
(RxD/TxD_P)
RS 485 (Modbus)
White - yellow
15
Shield Modbus
White - grey
20
+
Analog In 0
Grey - brown
21
-
0 ... 30 mA 2)
White - pink
22
+
Analog In 1
Pink - brown
23
-
0 ... 30 mA 2)
Yellow - brown
Chassis
PE
Shield
Gland
PE
1)
-7 ... + 12 V DC
Maximum possible power consumption.
2)
Maximum input values.
3)
Maximum output values. The following figures show how the outputs are used.
4)
Supported relay modes: "Normally Energized" (default), "Normally De-Energized".
For configuration, see section Configuration (Page 116).
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
75
Explosion protection
5.1 ATEX
Table 5- 5
Electric connection for PROFIBUS connection cable
Conductor color/no.
Connector position
(Receiver junction board)
Remarks
Function
1 (black)
1
+
Supply voltage
19 ... 30.3 VDC, 10 VA
2 (black)
Chassis
Red
13
A line
RS 485
Green
14
B line
communication
3 (black)
2
-
Supply voltage
19 ... 30.3 VDC, 10 VA
4 (black)
Chassis
Shield wire
15
PROFIBUS shield
Example: Digital out 0
&XVWRPHUVLGH
,PHDV
9
5ORDG
Figure 5-6
!6,75$166/
Using digital output
● V0 can be maximum 30 V DC.
● Rload must be minimum 60 Ω (max. 0.5 A in the relay).
76
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.1 ATEX
Example: Analog out 0
&XVWRPHUVLGH
,PHDV
9
5ORDG
Figure 5-7
!6,75$166/
Using analog output
● V0 must be minimum 7.5 V DC and maximum 30 V DC.
● Rload can be maximum ((V0 – 7.5 V)/0.025 A) Ω.
Note
The analog outputs of the SITRANS SL are passive and thus must be powered
externally!
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
77
Explosion protection
5.2 FM
5.2
FM
5.2.1
Introduction
The basic principles of explosion protection are the same all over the world. However,
technologies have developed in North America in the field of explosion protection for electric
equipment and installations which are considerably different from those of the IEC
(International Electrotechnical Commission). The differences from IEC technologies are
among others the classification of hazardous locations, the construction of devices and the
installation of electric systems.
WARNING
The FM certificate is a system certificate and is only valid if SITRANS SL is installed
according to the instructions given in the certificate.
5.2.2
Safety information
Electric safety
The SITRANS SL FM version is delivered with an approval for use in hazardous
environments in which explosive gases are in use.
WARNING
Open cable inlet or incorrect cable gland
Danger of explosion
Close the cable inlets for the electric connections. Only use cable glands or plugs which are
approved for the type of protection "Flameproof enclosure Ex d".
When using a conduit system, you must provide an ignition lock-out at a maximum distance
of 46 cm (18") from the device inlet. Screw in the conduit with at least four turns of the
thread.
Observe the specifications and laws with regard to the installation location of the device.
WARNING
Fix the safety mechanism for the lid.
78
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.2 FM
WARNING
Before opening the device wait at least two minutes after de-energizing. Make sure that
externally powered signals are also de-energized.
WARNING
Never repair the device on site!
Any components not mentioned in the spare parts list must be replaced or repaired by
certified field service technicians. Failure to do so will also result in loss of FM approval.
WARNING
Before switching on the analyzer make sure that the housing is closed and grounded.
The protective earth terminal of the SITRANS SL needs to be connected to the local
potential equalization system.
Death, personal injury and/or damage to property may result if this is not observed.
WARNING
The use of the alignment kit (A5E01000740) for aligning the sensors is not covered by the
FM certificate of the SITRANS SL analyzer.
Never use the kit in the hazardous area without permission of the plant manager (hot work
permit).
WARNING
Never open the cover of an energized SITRANS SL system in the hazardous area without
permission of the plant manager (hot work permit).
Death, personal injury and/or damage to property may result if this is not observed.
SITRANS SL FM meets all regulations specified in the present EU regulations (LVD
regulation 2006/95/EEC, EMC regulation 2004/108/EEC, ATEX regulation 94/9/EC) as well
as the regulations of the American market (FM).
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
79
Explosion protection
5.2 FM
Materials in the sensor pair
The sensor pair (transmitter and receiver) is built mainly using stainless or surface treated
steel and aluminium 231 (maximum magnesium content 0.5%). The O-rings and gaskets
used are made of FKM (fluoro polymer) or FFKM (perflour elastomer). The process interface
window is a made of borosilicate glass and contains an O-ring made of FKM. In the case that
gas purging of the sensor fails the O-rings will be the limiting component for the temperature.
They can withstand 215 °C/420 °F (FKM).
Pressure Safety
In some applications the process can be overpressurized. Normally this is not a situation
where the measurements will be adequate.
WARNING
The high pressure glass in the sensors must not be subject to any mechanical impact which
might cause damage to the glass (scratch, gash etc.). Only use a soft cloth for cleaning of
the glass. Make sure that it is safe to dismount the sensor before cleaning.
WARNING
Make sure all plugs and tube fittings are sealed with the enclosed pipe thread Sealant
(Swagelok MS-PTS-6). (Instructions given on the sealant tube must be carefully followed).
Approval
The concept of the FM approval is that the system is not modified and that special FM
approved cables and bushings are used. An absolute condition for the approval is that the
equipment is set up according to FM system set-up (Page 82).
Liability
Following commissioning, the total responsibility is with the owner.
80
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.2 FM
5.2.3
Installation of the FM version of SITRANS SL
The installation of the FM sensors can be performed by the customer provided the
instructions given in the certificate are fully observed.
CAUTION
The FM certificate is a system certificate and is only valid if SITRANS SL is installed
according to the instructions given in the certificate.
Note
SITRANS SL must be shut off and disconnected before reconnections are done.
①
Sensor housing lid locking screw
Figure 5-8
SITRANS SL FM installation
WARNING
The locking screw must be tightened.
Failure to do so will also result in a loss of the FM approval.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
81
Explosion protection
5.2 FM
5.2.4
FM system set-up
Note
The FM version of the SITRANS SL is delivered without cables.
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Overview of the FM version of SITRANS SL
CAUTION
Make sure that the receiver junction box cable between the junction box and the receiver
has a minimum length of 1.5 meter (5 ft) since it will be used as sensor connection cable
when the calibration of SITRANS SL is verified. In this process the end in the junction box
will be mounted in the transmitter and the cable length must be sufficient to mount the
sensors and the calibration verification module as described in the FM verification section.
82
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.2 FM
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
Manufacturer
FM marking
Datamatrix code
Country of origin
Measuring range
Figure 5-10
2M
AIT
W
-
Product version
Article number
Product name
FORE OPENING AFT
IN BE
ER
DE
-EN
ER
GI
ZI
N
G
Warning label
6(
Figure 5-12
Serial number
Example: FM label SITRANS SL
G
IN
N
AR
W
Figure 5-11
FM data
&
$//
$/
21'8,76:,7+,1,1
&+(
6
Note label SITRANS SL
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
83
Explosion protection
5.2 FM
1/2" NPT
Figure 5-13
Thread size label SITRANS SL
Verification of systems used in hazardous areas (Page 159)
5.2.5
Electric connections in the FM system
The electric connections are done in the receiver and transmitter respectively. The tables
below illustrate the connections in the receiver and the transmitter for the non PROFIBUS
version. The terminals as well as their assignments are described in section Screw terminals
(Page 48).
Sensor connection
The sensor connection connects receiver and the transmitter of the SITRANS SL. The
sensor connection is used to transfer:
● 100 kbps RS-485 communication
● power for the transmitter
● ground.
Table 5- 6
Electric connections for sensor connection, valid for FM product versions
Screw terminals on junction board
84
Function / Power
Receiver
Transmitter
L1
S1
+
L2
S2
-
L3
S3
Com+
L4
S4
Com-
L5
S5
Sync+
L6
S6
Sync-
Chassis
Chassis
Ground
Gland
Gland
Ground
24 V DC power supply to transmitter unit
RS 485 communication
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Explosion protection
5.2 FM
Connection cable
Table 5- 7
Electric connections for connection cable analog and Modbus, valid for FM product
versions
Terminals in receiver junction board
Function/Power
Supply voltage
19 ... 30.2 V, 10 VA 1)
1
+
2
-
3
Closed when energized 4)
Digital OUT 0 (relay)
30 V, 0.5 A 3)
Closed when energized 4)
Digital OUT 1 (relay)
30 V, 0.5 A 3)
7
+
8
-
Digital IN 0
0 ... 30 V 2)
9
+
10
-
11
+
12
-
13
PROFIBUS A-Line Modbus D1
(RxD/TxD_N - data (RxD/TxD_N - data
inverted)
inverted))
4
5
6
Ethernet cable
Analog OUT 0 (Measurement)
30 V, 24 mA 3)
Analog OUT 1 (Measurement)
30 V, 24 mA 3)
RS-485
PROFIBUS B-Line Modbus D0
(PROFIBUS 5) / Modbus)
(RxD/TxD_P - data (RxD/TxD_P - data - 7 ...+ 12 V DC
not inverted)
not inverted)
14
15
PROFIBUS / Modbus shield
16
Tx+
17
Tx-
18
Rx+
19
Rx-
20
+
21
-
22
+
23
-
White/Orange
Orange
Ethernet 6)
Green
Analog IN 0 (Temperature)
0 .. 30 mA 2)
Analog IN 1 (Pressure)
0 ... 30 mA 2)
24
Ground
25
Ground
Chassis
Ground
Gland
Ground
1)
Maximum possible power consumption.
2)
Maximum input values.
White/Green
Shield
3)
Maximum output values. The following figures show how the outputs are used.
4)
Supported relay modes: "Normally Energized" (default), "Normally De-Energized". For configuration, see
section Configuration (Page 116).
5)
Certified PROFIBUS wiring recommended, see section PROFIBUS DP interface (Page 129)
6)
We recommend not to connect the connection cable directly to Ethernet connectors. Instead the sensor
connection cable kit should be used for this purpose.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
85
Explosion protection
5.2 FM
Example: Digital out 0
&XVWRPHUVLGH
,PHDV
9
5ORDG
Figure 5-14
!6,75$166/
Using digital output
● V0 can be maximum 30 V DC.
● Rload must be minimum 60 Ω (max. 0.5 A in the relay).
Example: Analog out 0
&XVWRPHUVLGH
,PHDV
9
5ORDG
Figure 5-15
!6,75$166/
Using analog output
● V0 must be minimum 7.5 V DC and maximum 30 V DC.
● Rload can be maximum ((V0 – 7.5 V)/0.025 A) Ω.
Note
SITRANS SL provides no supply voltage for the analyzer outputs, i.e. the analog outputs
of the SITRANS SL are passive and thus must be powered externally!
See also
Screw terminals (Page 48)
86
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Commissioning
Commissioning
6.1
6
General information for commissioning
Device position
The SITRANS SL may be mounted in any direction.
When mounting the sensors the large springs of the alignment flanges must face
downwards. All purging outlets must face downwards.
Operation
WARNING
Dangerous voltage
Certain parts in the analyzer carry dangerous voltages which can become accessible as a
result of an open cover.
 Before you commission the device make sure that it is properly closed.
 Never open the device during operation
Before connecting and switching on the device, the operator must be familiar with the device
operation.
The user must also be familiar with the connection and operation of:
● Analog and digital pressure and temperature sensors, e.g SITRANS P or SITRANS T
● PROFIBUS DP and SIMATIC Manager when using the PROFIBUS-enabled SITRANS SL
analyzer;
● Modbus protocol and Modbus system configuration when using the Modbus-enabled
SITRANS SL analyzer
Temperature influence
During operation, make sure that the permissible ambient temperature of -20 °C to 55 °C
(-4 °F to 131 °F) is observed.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
87
Commissioning
6.2 Starting SITRANS SL for the first time
6.2
Starting SITRANS SL for the first time
6.2.1
Defining the path length
It is recommended that the open ends of the purging tubes represent the reference points
from which the path length is determined. When the flanges are permanently installed,
measure the distance between the outside of the flanges with an accuracy of at least ±10
mm (±0.4"). This distance is used to calculate the path length by subtracting the length of the
flange tubes and will later be used in the analyzer for the calculation of the gas
concentration. In the area where the purging gas and the measurement gas are mixed there
will be a zone of uncertainty. This zone will depend on the purging flow and the flow of the
measurement gas.
The path length is entered into SITRANS SL, preferably using the remote control. The path
length is the distance (l) according to the following figure. For measuring the path length (l)
refer also to Installation of process flanges (Page 43).
O
①
②
Purging tube
l
Path length
Process wall
Figure 6-1
88
Defining the path length
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
6.2.2
Further input parameters
Input of process temperature
The process temperature can either be input using an external sensor or entered as a fixed
value using the remote control, see also Electric connections non Ex (Page 46) and General
(Page 111) .
Input of process pressure
The process pressure can either be input using an external sensor or entered as a fixed
value using the remote control, see also Electric connections non Ex (Page 46) and General
(Page 111).
6.3
PROFIBUS configuration for SITRANS SL
Information on the input and output range as well as the consistency of cyclically transmitted
data is defined in the device master data file (GSD file). Using the configuration package,
this information is checked by the device and declared valid. During projection phase the
data to be transmitted in cyclical operation will be determined. This enables an optimal
quantity of the data to be transmitted. In the Siemens control system, the GSD files of all
commonly used devices are already available. These GSD files are also available on the
Internet for a subsequent import.
6.3.1
Cyclic data transfer
Cyclic data transmission is used to transfer data necessary for process automation between
the control or automation system (class 1 master) and the SITRANS SL device.
Setting the PROFIBUS address
The PROFIBUS address is factory-set to 126. It can be changed by the user
● using LUI (see section Menu - Communication (Page 125))
or
● using the configuration tool LDSComm.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
89
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
6.3.2
System integration
The user data which are provided over the PROFIBUS line to the process control system are
based on the target configuration.
The following example is from a Siemens STEP7 project, and demonstrates how to
configure the cyclic DPV0 data exchange.
Overview of installation and configuration steps
1. SIMATIC MPI cable installation
2. PG/PC Interface setting
3. Loading GSD file
4. Network configuration with the SIMATIC Manager
5. Creation of a new project with the SIMATIC Manager
6. Hardware configuration
6.3.3
SIMATIC MPI cable installation
● SIMATIC Manager uses SIMATIC MPI cable for loading configuration data to the PLC via
its SIMATIC MPI connector.
● SIMATIC MPI cable consists of a PCMCIA card and a serial cable for connecting to the
MPI port of the PLC.
● SIMATIC MPI cable is ready to use after its driver has been installed successfully.
90
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
6.3.4
PG/PC interface setting
The SIMATIC MPI cable setting has to be made using the "Set PG/PC Interface" window
from the Options menu.
Prerequisite:
The connection between the PC and SITRANS SL has been established. The SIMATIC
Manager is installed on the PC and the Windows XP operating system has been started.
Procedure:
Start the operating program "Set PG/PC Interface" (start bar Start ➜ Programs ➜ SIMATIC
➜ Options ➜ Set PC-PG Interface).
1. Select one of the following options in the list "Interface Parameter Assignment Used":
– CP5512 (MPI) must be chosen for the connection to the MPI port of the PLC
– CP5512 (PROFIBUS) must be chosen for the connection to the PROFIBUS connector
of the PLC
– CP5613 2A
– CP5611 PCMCIA
2. The interface properties such as transmission rate can be selected from properties
window.
SITRANS SL
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91
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
6.3.5
Loading GSD file
You use the SIMATIC Manager to load the GSD file of SITRANS SL.
Procedure:
Start the operating program "SIMATIC Manager" (start bar Start ➜ Programs ➜ SIMATIC ➜
SIMATIC Manager).
1. Select the "Open" command in the menu "File".
2. Select the project of SITRANS SL.
3. Double click on "Hardware" for opening "HW Config".
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SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
4. Select the "Install GSD file..." in the menu "Options".
5. Close the opened project in HW Config.
SITRANS SL
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93
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
6. Navigate to the corresponding GSD file using the button "Browse" on your hard drive.
7. Mark in the selection list the GSD file and press the button "Install".
8. Finish the installation of the GSD file by pressing the button "Close".
94
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
6.3.6
Network configuration with SIMATIC Manager
The SIMATIC Manager Step7 is the network configuration tool that will be used to configure
the PROFIBUS DP network.
SIMATIC Manager uses GSD files in order to know the properties of the devices in the
network configuration. The configuration is then loaded to the PLC for informing the PLC
about the PROFIBUS slaves in the network.
After the network configuration is loaded to the PLC, the PROFIBUS communication will be
started by the PLC with the configured slaves.
The steps for creating and loading a Step7 project are:
1. Create the project by selecting CPU and organization blocks.
To do so use the 'New Project Wizard'.
2. Build the network configuration in hardware configuration window and compile.
3. Write the application software for the organization blocks in STL, LAD or FBD.
4. Adjust the PG/PC interface.
5. Download hardware configuration, system data and the organization blocks to the PLC
6. Wait for the PLC to restart.
7. Check the status LEDs on the PLC for a proper PROFIBUS communication. The Red SF
and BF LEDs must be off and the green RUN LED must be on.
SITRANS SL
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95
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
6.3.7
Creation of a new project with SIMATIC Manager
You create a new STEP 7 project using the SIMATIC Manager.
Procedure:
1. Start the operating program "SIMATIC Manager" (Start bar Start ➜ Programs ➜
SIMATIC ➜ SIMATIC Manager).
2. Create a new project in the SIMATIC Manager with the File ➜ "New Project" Wizard
menu command. Reaction: The STEP 7 Wizard: "New Project" opens.
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6.3 PROFIBUS configuration for SITRANS SL
3. Click the button "Next". Reaction: The STEP 7 Wizard: "New Project" opens a dialog box
for selecting the CPU.
SITRANS SL
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97
Commissioning
6.3 PROFIBUS configuration for SITRANS SL
4. Pick your required CPU from the selection list and click the button "Next". Reaction: The
STEP 7 Wizard: "New Project" opens a dialog box for selecting the blocks.
5. In the selection list mark the check boxes for OB1 (program cycle execution block),
OB100 (complete restart) and OB35.
Note
 OB1 is the block which is continuously active in the background.
 OB100 is the block which is called once during the startup of the PLC.
 OB35 is the block that is called periodically with a timer interrupt. Its period can be
changed. SFC14 and SFC15 are the system functions that are used in OB35
organization block.
 OB80 to OB88 are the organization blocks that are used for error situations.
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Commissioning
6.3 PROFIBUS configuration for SITRANS SL
6. Click the button "Next". Reaction: The STEP 7 Wizard: "New Project" opens a dialog box
for setting the project name. Type the name or pick an existing one.
7. Click the button "Finish". Reaction: The STEP 7 project is created with the organization
blocks OB1, OB100 and OB35.
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Commissioning
6.3 PROFIBUS configuration for SITRANS SL
● Optionally you can add the organization blocks from OB80 to OB88 with the menu
command Insert ➜ S7 Block ➜ Organization Block.
100
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Commissioning
6.3 PROFIBUS configuration for SITRANS SL
6.3.8
Hardware configuration
Creating PROFIBUS Network
Procedure:
1. Double click on "Hardware" for opening "HW Config" in the selection list on the left hand
side of the project window SIMATIC 300 Station.
2. In the selection list mark "(0)UR" DP item.
3. Click with the right mouse button on the DP item and then click on "Add Master System".
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Commissioning
6.3 PROFIBUS configuration for SITRANS SL
PROFIBUS Network Configuration
1. Mark in the selection list "PROFIBUS(1): DP master system (1)" with the right mouse
button.
2. Enter the dialog box 'Network Settings' in "Properties -PROFIBUS"
3. In the selection lists pick your object properties.
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Commissioning
6.3 PROFIBUS configuration for SITRANS SL
SITRANS SL Configuration
Prerequisite:
● SITRANS SL is selected from the hardware catalog and placed into PROFIBUS DP
master system.
● The appropriate measurement type telegram is selected and placed into SITRANS SL
slots starting from the first empty slot.
Procedure:
Modify the I/O addresses of the modules to your needs.
1. ´Select the measurement type from the selection list "Selection of the Present
Configuration", e. g. O2 Measurement.
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Commissioning
6.3 PROFIBUS configuration for SITRANS SL
2. Select the subnet type from the selection list "Properties - PROFIBUS interface
SITRANS SL".
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Commissioning
6.3 PROFIBUS configuration for SITRANS SL
3. In the HW Config window you can check the number of blocks and the address
assignment.
Measurement Type Selection
● Concentration measurement output
First input module in the first slot. Consists of 4 byte float value and 1 byte status value.
● Transmission value (absolute transmission) output
Third input module in the third slot. Consists of 4 byte float value and 1 byte status value.
● Temperature input:
First output module in the fifth slot. Consists of 4 byte float value and 1 byte status value.
● Pressure input:
Second output module in the sixth slot. Consists of 4 byte float value and 1 byte status
value.
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Commissioning
6.4 Modbus configuration for SITRANS SL
6.4
Modbus configuration for SITRANS SL
6.4.1
Modbus settings
Modbus settings are configurable via LUI. Detailed information about the parameters can be
found in the Generic Modbus device specification.
Default values of the Modbus settings are stored in the ModbusConfig.xml. If these
parameters are modified by customers, the modified paramters will be stored in the
EEPROM and then be effective.
Table 6- 1
Modbus settings
Setting parameter
Slave ID
Baud Rate
Parity
Transmission mode
LUI
1 to 247
1
X
300 – 115200
19200
X
None, Even, Odd
None
X
RTU + ASCII
RTU
X
RTU frame timeout
0 - 600000 ms
50 ms
X
ASCII frame timeout
50 - 600000 ms
1000 ms
X
Application answer
timeout
50 - 10000 ms
1000 ms
X
5 - 1000 ms
20 ms
X
Data Bits
7, 8
8
X
Stop Bits
1, 2
1
X
Minimum answer delay
time
6.4.2
Default
Byte and word ordering
● The interpretation of the data field within the Modbus RTU protocol is according to the
original Modbus Application Protocol Specification "big endian Mode".
● Given that the Modbus RTU message protocol is "big endian", in order to successfully
exchange a 32 bit data type via a Modbus RTU message, the endianness of both master
and slave must be ensured. SITRANS SL allows specific selection of byte orders, so you
must take care that both units are set to the same byte order.
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Commissioning
6.4 Modbus configuration for SITRANS SL
6.4.3
Supported Modbus functions
Modbus defines a set of data and control functions to perform data transfer and slave
diagnostic.
The following Modbus functions are implemented:
● 0x01 Read Coils
● 0x02 Read Discrete Inputs
● 0x03 Read Holding Registers
● 0x04 Read Input Registers
● 0x05 Write Single Coil
● 0x06 Write Single Register
● 0x08 Diagnostics, Echo Only (sub function 0)
● 0x0F Write Multiple Coils
● 0x10 Write Multiple Registers
● Enron Modbus Support
– Support for 32-bit registers via codes 0x03 and 0x10
– Optional support for offset 0 between frame and application
See also
Modbus interface (Page 136)
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Commissioning
6.4 Modbus configuration for SITRANS SL
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SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
7
Operation
The following description contains an overview of the operating functions which you can
perform on the device. You can operate the device using the remote control or the local user
interface (LUI). This includes the setup of PROFIBUS, Modbus, analog and digital inputs and
outputs.
WARNING
Dangerous voltage
Certain parts in the analyzer carry dangerous voltages which can become accessible as a
result of an open cover.
 Before you switch on the device make sure that it is properly closed.
 Never open the device during operation
Local user interface (LUI)
The local user interface consists of a digital display and four buttons.
①
②
③
Digital display (measurement view)
Buttons
Receiver for remote control signals
Figure 7-1
Digital display and buttons
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109
Operation
CAUTION
During operation only use remote control
To operate the device directly via the buttons on the LUI PCB you have to unscrew the lid.
Doing so airborne substances may intrude into the device thus leading to a possible
damage. To avoid this always operate the device using the remote control.
Operations via the buttons on the LUI PCB are only allowed for test and service purposes.
Remote control
SITRANS SL can be operated at site with an infrared remote control.
This device is intrinsically safe and certified:
according to ATEX
according to CSA/FM
II 1 G EEx ie IIC T4
SIRA 01ATEX2147
CLASS I, DIV 1,
GROUPS A,B,C,D
The following figure shows the keypad layout of the remote control.
Figure 7-2
110
Keypad of the remote control for SITRANS SL
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Operation
7.1 General
7.1
General
NOTICE
Dynamic behaviour of the Local User Interface LUI
The LUI will time out, exit the current menu and return to measurement view when no key
has been pressed for 10 minutes. Password-protected functions will be relocked.
Navigating in the menu system
The LUI can be operated either by means of the buttons on the PCB, or preferably by means
of the enclosed remote control. To enter the menu, press the right key.
Table 7- 1
Key functions of the menu system
Key functions in the menus
Menu action
Enter menu system
Navigate in menu
Key on remote control
(right key) or
(up key) or
(Return key)
(down key)
Select highlighted radio button
or toggle highlighted checkbox
(right key) or
(Return key)
Exit current menu
(move up in the tree)
(left key) or Esc key
Key on PCB (lid open)
(right key)
(up down keys)
(right key)
(left key)
Editing settings
A number of parameter settings can be displayed and edited via the LUI. When a setting is
selected the first display shows the current setting of the parameter value or in some cases
the pair of values. To change a value, select edit and press the right key. The edit display
shows:
● The current value
● The editing row, where the new value can be typed in
● Upper and lower limits for the parameter value
NOTICE
To enter the Edit display, the LUI must first be unlocked. Any entries of values outside
the allowed range are discarded.
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111
Operation
7.1 General
Examples
Path length
Edit path length
Scaling
Edit lower value
Table 7- 2
Key functions when editing
Edit action
Key on remote control
Move to digit
and
and
Alter digit
Press digit number key
Delete digit
C
Use
to select #
Insert
*)
Use
to select >
Decimal point
.
Use
to select .
+/-
Press +/(not dependent on cursor
position)
Move to the leftmost position,
Use
to select + or -
Cancel editing
Esc
Move to the leftmost position,
then press
Confirm edited value
*)
112
Key on PCB (lid open)
Move to the rightmost position,
then press
Can not be done with the remote control. The input must be rewritten.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Operation
7.1 General
Saving settings
When a change has been made to a setting the new value is immediately used by the
analyzer. The value is however not yet stored permanently, i.e. after a power failure the old
value(s) will be used.
To store the new value(s), press left key or Esc key repeatedly to move back to the main
menu, then press left key or Esc key once more to exit the menu.
The LUI will now inform that changes have been made and display the save settings
dialogue.
CAUTION
After changing the settings exit the menu system and select OK when asked to save the
settings.
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Operation
7.2 Measurement views
7.2
Measurement views
Measurement view
Gas component, e.g. O2
Pressure
Temperature
Transmission
When not being edited, the SITRANS SL LUI displays the Measurement view containing the
following information:
● Present measured components with corresponding Value and Unit.
● Alarm status icon or icons, if multiple alarms are trigged.
● Alarm text. If multiple alarms are trigged only the most severe is presented by text, while
the icon toggles through the list of active alarms.
● To read through the list of active alarms, press the Left Key repeatedly.
The following key functions are available:
● Up/Down – select component to view
● Right – enter menu
● Left – view next active alarm
114
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Operating Instructions, 12/2010, A5E01132948-04
Operation
7.3 Menu system
7.3
Menu system
7.3.1
The menu structure
The main menu is entered by pressing
To exit press
Changes are saved when the main menu is exited.
In the following menu structures white boxes indicate selection screens, grey boxes indicate
edit screens, and black (inverted) boxes represent displays without any user interactions.
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Operation
7.3 Menu system
7.3.2
Configuration
Main Menu
Configuration
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116
The setup menu
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Operation
7.3 Menu system
Path length
View/edit path length in meters with three decimal digits.
Temperature correction
This menu is dynamic; at first level you're asked to "Set source" which then displays a list of
all available temperature inputs.
The example in the following display sequence shows the steps to change the source from
analog input to manual input.
Parameter "Temperature correction" for
analog input
Parameter "Set source" in a PROFIBUS device
configuration
Parameter "Set source" in a Modbus
device configuration
Paramater "Temperature correction" for manual
input
Pressure correction
Settings, sequences, and parameters are similar to those of the temperature correction
menu.
Integration time
This menu is dynamic and depends on the application. Integration time settings are possible
for the following components:
● Measurement component (e.g. O2, CO)
● Absolute transmission
● Temperature
● Pressure
An averaging filter is connected to each component. For each component the filter
parameter "integration time" can be used to balance the needs of response time and noise
reduction.
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Operation
7.3 Menu system
Digital outputs
The digital outputs are realized as relays providing the following functions:
● Assign alarm(s) from the alarm list to a digital output. Possible settings are:
– M(aintenance) fault
– M demanded
– M required
– P(rocess) V(alue) fault
– PV warning
– PV tolerance
– No data exchange
– Local override
– Configuration warning
– Data exchange
– Device unlocked
To assign or cancel an alarm use the
(right arrow) button.
● Select state of relay in normal operation
– "Normally energized" - relay contact for the alarm signal is closed.
– "Normally de-energized" - relay contact for the alarm signal is open.
"Normal" refers to the normal state of operation of the analyzer. The system is powered and
running without any problems, no error signal is generated and displayed.
"Normally Energized" refers to the state of the relay in normal operation. The relay contact
for the alarm signal is closed in normal state of operation when checked.
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Operating Instructions, 12/2010, A5E01132948-04
Operation
7.3 Menu system
Output configuration
The analyzer produces several measurements, referred to as components. Each component
can have several outputs. The measurement view of the LUI is also an output.
The outputs are arranged by components.
After selecting component a list of all output channels for this component is displayed.
After selecting an output, the settings for this output are displayed. The number of settings
available depends on the type of output. In the pictures above an analog output is selected
and the parameters 'Scaling' and 'Suppress negative values' can be edited. Before you can
start editing the LUI must be unlocked.
Analog output settings
Set scale
Suppress negative values
LUI output settings
Suppress negative values
PROFIBUS output settings
Suppress negative values
Modbus output settings
Suppress negative values
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Operation
7.3 Menu system
7.3.3
Diagnostics
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The diagnostics menu
View log book
The condition monitoring functions of the analyzer generates status messages, warnings and
alarms. In this text the severity level of the alarm is disregarded and all status information is
referred to as alarms. An alarm can go active at a certain time and then passive if the
erroneous condition disappears. In the following text an alarm event refers to when an alarm
changes state.
When the log book is opened the groups screen is first displayed, it gives an overview of the
analyzers status. To get detailed technical information for a group, highlight the group and
press Right key.
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SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Operation
7.3 Menu system
The log book groups screen
The alarms are arranged in groups. The first screen of the logbook displays all groups that
have had an alarm event since the logbook last was cleared.
Example
+
G
1
0
0
3
8
1
:
0
Seconds
Minutes
Hours
Days
Group name
+ (active) - (inactive)
The groups are displayed in a compact format; each row contains the current status, the
group name and a time-stamp for the last change.
8
:
1
2
:
3
4
In the example above; an alarm related to a measurement being out of range went active
after 381 days, 8 hours, 12 minutes and 34 seconds of runtime. Note that the time refers to
systems total run time; the SITRANS SL does not have a real time clock.
The groups are sorted by the time for the last event. The group which last had a change of
status is on top of the list. Each group will only appear once in the list, so the group view will
not display the entire history.
The log book details screen
When "details" is opened for a group the underlying alarm log is displayed. The "details"
screen gives technical information of the exact cause for the problem.
The alarm events are displayed in the same format as the groups are; with status event,
alarm name and the time-stamp of the event.
The two possible events for an alarm are:
● Went active (+)
● Went inactive (-)
The size of the log book is limited and can store 4 events for each individual alarm.
Note that when one alarm within a group goes active the group is active. The group is
inactive when all of the underlying alarms are inactive. For this reason there can be alarms
within a group that are more recent than indicated by the group’s time-stamp, i.e. when an
alarm within a group becomes active while the group contains active alarms.
Log book groups and alarms are defined in chapter Alarm, error, and system messages
(Page 163).
Clear log book
Clears the log book.
Before you use this function the LUI must be unblocked.
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121
Operation
7.3 Menu system
7.3.4
Service
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Service menu
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Operation
7.3 Menu system
About SITRANS SL
Informative display informs about the following system parameters:
● Analyzer serial number
● Analyzer revision
● Application name
● Software Version
● MLFB (order) number
● Transmitter FPGA
● Receiver FPGA
● Transmitter PLD
● Junction PLD
Calibrate
CAUTION
Never use this function without having contacted Siemens service first!
Inappropriate use of this function may seriously affect the accuracy of the analyzer.
After selecting one of the gas components to be calibrated the calibration menu is displayed
providing the following options:
● Measured value - displays currently measured value
● Setpoint – edit setpoint
● Calibrate – perform (or cancel) calibration
Reset
Reset the analyzer
This action requires confirmation before it is started.
Analog output test
Select output to test:
● Analog out 0
● Analog out 1
Once an output has been selected a confirmation is requested before test mode is entered.
After confirmation the output current is displayed and can be edited.
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123
Operation
7.3 Menu system
Analog input test
Select input to monitor
● Analog temperature input
● Analog pressure input
The current reading for the selected input is displayed and continuously updated.
Digital input test
Sitrans SL provides one configurable binary input for quality information of external sensors.
This binary input is mapped within the application software to input 0 and input 1. Both inputs
are displayed and continuously updated.
Relay test
The test mode will override the actual output values of the analyzer. The user is asked for a
confirmation before test mode is entered.
The two relays are represented by check boxes, where X represents an active signal on the
relay (i.e. relay de-energizes)
View spectrum
Displays the spectrum as a graph
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Operating Instructions, 12/2010, A5E01132948-04
Operation
7.3 Menu system
7.3.5
Communication
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The communication menu
Note
You can configure only Modbus or PROFIBUS parameters when SITRANS SL has been
setup with the respective communication interface.
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Operating Instructions, 12/2010, A5E01132948-04
125
Operation
7.3 Menu system
TCP/IP
Menu leads to editing screens for the setting of
● IP Address
● Subnet Mask
● Gateway
PROFIBUS
Menu leads to the editing screen for the setting of
● PROFIBUS address
After changing the parameter the analyzer must be reset before the new setting takes effect.
Modbus
see Modbus settings (Page 106)
126
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Operating Instructions, 12/2010, A5E01132948-04
Operation
7.3 Menu system
7.3.6
Security
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The security menu
Unlock
Enter password "111" to unlock write protection. This enables editing of the settings
available in the LUI.
Lock
Locks the LUI. Settings can be viewed but not edited.
Indicator
The state of the menu (locked/unlocked) is indicated by a symbol in the upper left corner of
the display ( means locked, means unlocked).
Operating hours
Operate the LUI using the buttons of the remote control:
● Press
to open the menu
● Select Security, unlock and enter the password.
● Now select Diagnostics and open the log book.
● Select G6
● The alarm E61 (LUI unlocked) is now active.
● The time stamp for this alarm is the system run time, Operating hours
(DDDD HH:MM:SS).
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127
Operation
7.3 Menu system
7.3.7
Language
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The language menu
Select language from the list of available languages.
After change of language the analyzer must save settings (user confirmation) and then
restart (user confirmation) before the new setting takes effect.
128
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Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
Interfaces to automation systems
8.1
8
PROFIBUS DP interface
Note
You can obtain further information from the PROFIBUS user organization or on the Internet
at (www.profibus.com).
8.1.1
PROFIBUS installation
When you use the PROFIBUS DP interface then use the designated PROBIBUS DP cable,
e.g. the PROFIBUS DP hybrid cable which includes instrument power and ground
conductors.
Cable requirements
Type-A PROFIBUS hybrid cable with conductors for supply voltage and protective earth. The
ATEX variant is delivered with 3m of PROFIBUS hybrid cable mounted.
Connecting to the bus
To install the SITRANS SL as the single or as the last device of a PROFIBUS segment:
1. Ensure that the termination resistor is turned on.
2. Connect the PROFIBUS hybrid cable to the SITRANS SL receiver.
3. Use a junction box to connect PROFIBUS network and power to the PROFIBUS hybrid
cable.
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Interfaces to automation systems
8.1 PROFIBUS DP interface
To install the SITRANS SL as a device in-between other devices on a PROFIBUS segment:
1. Ensure that the termination resistor is turned off.
2. Connect the PROFIBUS hybrid cable to the SITRANS SL receiver.
3. Use a junction box to connect supply voltage to the PROFIBUS hybrid cable.
4. For connecting the SITRANS SL to the PROFIBUS segment there are two options:
– Active bus tap-off: Use a bus terminal, repeater or an active cable to make the Tconnection. In an Ex environment the repeater used must either be certified for use in
an Ex environment, or be placed in a safe zone.
– Passive bus tap-off (stub-wire): Connect the SITRANS SL directly to the PROFIBUS
segment.
Note
Note that the hybrid cable will become a stub-wire of the PROFIBUS segment.
This solution should only be considered by experienced PROFIBUS users, and if the
network segment is known to have good quality. According to the PROFIBUS
standard, the total length of stub-wires in a PROFIBUS segment must be less than
6.6 m at 1.5 Mbits/s provided that Type A cable is used. For higher bit-rates, stubwires shall not be used.
Reference Voltage
● Grounded reference voltage system
This is the standard arrangement for PROFIBUS DP devices, where the shield of the
PROFIBUS cable is connected to protective earth (PE) at every device.
To achieve this in the SITRANS SL, connect screw terminal 15 (PROFIBUS shield) to
screw terminal 24 (Ground) in the SITRANS SL Receiver.
● Non-Grounded reference voltage system
To achieve this in the SITRANS SL, ensure that screw terminal 15 (PROFIBUS shield) is
connected only to the shield of the PROFIBUS cable. Ensure that the shield of the
PROFIBUS cable is not connected to the chassis at the cable gland.
The SITRANS SL is equipped with a standard R/C circuit between PROFIBUS shield and
protective earth (PE) in order to improve interference immunity for non-grounded
reference voltage systems.
130
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Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
8.1 PROFIBUS DP interface
Safe operation
For safe operation of PROFIBUS DP note the following points:
● Observe the general PROFIBUS guidelines for installation.
● When installing the SITRANS SL as the only analyzer, or as the last analyzer in a
PROFIBUS DP network:
– Ensure to switch on the terminal resistor on. The switch is found next to the screw
terminals in the receiver unit.
● When installing the SITRANS SL on a PROFIBUS DP network, where there are
subsequent devices:
– Ensure to switch the terminal resistor off. The switch is found next to the screw
terminals in the receiver unit.
– As the SITRANS SL connection cable will be a stub wire of the PROFIBUS DP
network, keep the length of the stub wire as short as possible and verify that the total
length of stub wires is not exceeded in the network for the baud rate used.
8.1.2
Device data base files (GSD)
PROFIBUS DP requires files for cyclic data transmission which you can download from the
SIEMENS internet support site (http://support.automation.siemens.com)
8.1.3
siem815b.gsd
( 9 KB) DP independent language
siem815b.bmp
(18 KB) Bitmap Device
Technical data
PROFIBUS DP (according to EN 50170)
Baud rates: 9.6, 19.2, 93.75, 187.5, 500 kBit/s, 1.5 MBit/s, 3 MBit/s
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
131
Interfaces to automation systems
8.1 PROFIBUS DP interface
8.1.4
Cyclic data transmission over PROFIBUS
8.1.4.1
Cyclic data structure
Specific parameters physical block for passive bus tap-off
The following user data can be exchanged cyclically using the PROFIBUS.
Parameter name
Meaning
Direction seen
from gas analyzer
Data type
Length in byte
Concentration
Measured value
and status.
Output
DS-33
5
Transmission
Measured value
and status.
Output
DS-33
5
Pressure
Process pressure
in mbar.
Input
DS-33
5
Temperature
Process
temperature in
Celsius Degree.
Input
DS-33
5
DS 33 data type
Each value is represented as a 5 bytes value. The first four bytes build the measurement
value, transmitted according to IEEE-754. The fifth byte is used for status.
Byte 1
Byte 2
Byte 3
Byte 4
Value in IEEE-754 floating point
132
Byte 5
Status
Exponent
Fraction
-
MSB
-
-
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
8.1 PROFIBUS DP interface
8.1.4.2
Quality byte
Meaning of status
A status byte is transmitted synchronously in addition to each of the measured values in the
DS-33 data structure. This byte provides indication of the quality for this value in a "quality
code". Due to this it is henceforth referred to as "quality byte".
The quality byte has the following structure:
06%
4XDOLW\
6XEVWDWXV
/LPLWV
EDG
XQFHUWDLQ
JRRG
JRRGFDVFDGHG
2XWSXWYDOXH
6XEVWDWXVLVDOZD\VVHWWR
,QSXWYDOXH
6XEVWDWXVLVQRWHYDOXDWHG
Figure 8-1
2.
ORZOLPLWHG
KLJKOLPLWHG
FRQVWDQW
Quality byte coding
Note
Error codes and alarm list
For explanation and action of error codes and the alarm list refer to chapter Alarm, error, and
system messages (Page 163) .
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
133
Interfaces to automation systems
8.1 PROFIBUS DP interface
Quality byte coding for measurement output:
Status coding for "bad quality"
Dec
Hex
Cause
Remedy
00
00
Maintenance fault or process value
fault.
See alarm list.
Status coding for "uncertain quality"
Dec
Hex
Cause
Remedy
64
40
Maintenance demanded or process
value warning or process value out
of tolerance.
See alarm list.
Dec
Hex
Cause
Remedy
128
80
Normal operation.
You can evaluate the measured values.
Status coding for "good quality"
134
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
8.1 PROFIBUS DP interface
Quality byte coding of input values for process pressure and process temperature:
Status coding for "bad quality"
Dec
Hex
Cause
Error codes and remedy
00
00
Quality status of source is bad.
Depending on the PROFIBUS source the
quality status is mapped to error code E12
for temperature or E16 for pressure.
01
01
Quality status of source is bad and
temp. or pressure is low limit.
Temperature: E12 & E13
Pressure: E16 & E17
02
02
Quality status of source is bad and
temp. or pressure is high limit.
Temperature: E12 & E14
Pressure: E16 & E18
03
03
Quality status of source is bad and
temp. or pressure is constant.
Temperature: E12 & E15
Pressure: E16 & E19
Status coding for "uncertain quality"
Dec
Hex
Cause
Error codes and remedy
64
40
Quality status of source is uncertain.
Depending on the PROFIBUS source the
quality status is mapped to error code E23
for temperature or E24 for pressure.
65
41
Quality status of source is uncertain
and temp. or pressure is low limit.
Temperature: E23 & E13
Pressure: E24 & E17
66
42
Quality status of source is uncertain
and temp. or pressure is high limit.
Temperature: E23 & E14
Pressure: E24 & E18
67
43
Quality status of source is uncertain
and temp. or pressure is constant.
Temperature: E23 & E15
Pressure: E24 & E19
Status coding for "good quality"
Dec
Hex
Cause
Error codes and remedy
128
80
Ok
129
81
Quality status of temp. or pressure is Depending on the PROFIBUS source the
low limit.
quality status is mapped to specific error
code for temperature or pressure.
Temperature: E13
Pressure: E17
130
82
Quality status of temp. or pressure is Temperature: E14
high limit.
Pressure: E18
131
83
Quality status of temp. or pressure is Temperature: E15
constant.
Pressure: E19
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
135
Interfaces to automation systems
8.2 Modbus interface
8.2
Modbus interface
Note
You can obtain further information from the Modbus IDA user organization or on the Internet
at the Modbus internet site (www.modbus.org).
8.2.1
Modbus installation
Connection via RS485 interface
The SITRANS SL gas analyzer provides Modbus communication to a PC or an automation
system via an RS485 interface.
The SITRANS SL gas analyzer may be connected to a network. Such a network is normally
built as a bus topology which needs to be terminated via RC termination plugs. The same
applies to a point-to-point connection.
In a physical network up to 32 SITRANS SL analyzers may be connected to a Modbus
system via the RS485 interface.
Cable type
A two lined twisted pair cable with shielding is used for the Modbus connection. The
maximum cable length is limited to 1200 m.
Signal converter
If the PC has no RS485 interface, an RS232/RS485 signal converter must be linked between
the PC and the Modbus network.
Termination resistor
The termination resistor on the junction board must be switched off.
Connection
● Data (N) = PROFIBUS A (electric connector 13 on junction board of SITRANS SL)
● Data (P)= PROFIBUS B (electric connector 14 on junction board of SITRANS SL)
● Shield= PROFIBUS shield (electric connector 15 on junction board of SITRANS SL)
Performance requirement
The minimum access interval from Modbus master is >100 ms.
136
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
8.2 Modbus interface
8.2.2
SITRANS SL Modbus map for gas measurement
Information from the SITRANS SL can be transferred to a PC/PG via the Modbus.
Measurement values, status signals and also signals of analog and digital inputs and outputs
are thus available for further usage.
Overview of used register numbers (Standard Modbus)
Modicon-modbusaddress
Type
Data Address
Description
30001
Input Register (R)
0
Process data
30101
Input Register (R)
100
Device Status
40001
Holding Register (R+W)
0
Input process data
Example
The first Holding Register, number 40001, has the Data Address 0000. Offset is 1.
Overview of used register numbers (Enron Modbus)
Modicon-modbusaddress
Variable type
Data Address
Description
3001
16 bit Short integer (R+W)
3000
Process data
5001
32 bit Long integer (R+W)
5000
Process data
7001
32 bit Floating point (R+W)
7000
Process data
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
137
Interfaces to automation systems
8.2 Modbus interface
8.2.3
Quality byte coding
Overview quality byte coding
The Modbus quality byte has the same structure and meaning as the one used for
PROFIBUS.
Structure and meaning of quality byte:
06%
4XDOLW\
6XEVWDWXV
/LPLWV
EDG
XQFHUWDLQ
JRRG
JRRGFDVFDGHG
2XWSXWYDOXH
6XEVWDWXVLVDOZD\VVHWWR
,QSXWYDOXH
6XEVWDWXVLVQRWHYDOXDWHG
Figure 8-2
2.
ORZOLPLWHG
KLJKOLPLWHG
FRQVWDQW
Quality byte coding
Note
Error codes and alarm list
See for explanation and action of error codes and the alarm list chapter Alarm, error, and
system messages (Page 163) .
138
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
8.2 Modbus interface
Quality byte coding for measurement output:
Table 8- 1
Status coding for "bad quality":
Dec
Hex
Cause
Remedy
00
00
Maintenance fault or process value fault.
See alarm list
Table 8- 2
Status coding for "uncertain quality":
Dec
Hex
Cause
64
40
Maintenance demanded or process value See alarm list.
warning or process value out of tolerance.
Table 8- 3
Remedy
Status coding for "good quality":
Dec
Hex
Cause
Remedy
128
80
Normal operation
You can evaluate the measured values.
Quality byte coding of input values for process pressure and process temperature:
Table 8- 4
Status coding for "bad quality":
Dec
Hex
Cause
Remedy
00
00
Quality status of source is bad
Depending on the PROFIBUS source the
quality status is mapped to error code
E12 for temperature or E16 for pressure.
01
01
Quality status of source is bad and temp.
or pressure is low limit
Temperature: E12 & E13
Pressure: E16 & E17
02
02
Quality status of source is bad and temp.
or pressure is high limit
Temperature: E12 & E14
03
03
Quality status of source is bad and temp.
or pressure is constant
Temperature: E12 & E15
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Pressure: E16 & E18
Pressure: E16 & E19
139
Interfaces to automation systems
8.2 Modbus interface
Table 8- 5
Status coding for "uncertain quality":
Dec
Hex
Cause
Remedy
64
40
Quality status of source is uncertain
Depending on the Modbus source the
quality status is mapped to error code
E23 for temperature or E24 for pressure.
65
41
Quality status of source is uncertain and
temp. or pressure is low limit
Temperature: E23 & E13
Quality status of source is uncertain and
temp. or pressure is high limit
Temperature: E23 & E14
Quality status of source is uncertain and
temp. or pressure is constant
Temperature: E23 & E15
66
67
42
43
Table 8- 6
Pressure: E24 & E17
Pressure: E24 & E18
Pressure: E24 & E19
Status coding for "good quality":
Dec
Hex
Cause
128
80
Ok
129
81
Quality status of temp. or pressure is low
limit
Remedy
Depending on the PROFIBUS source the
quality status is mapped to specific error
code for temperature or pressure.
Temperature: E13
Pressure: E17
130
131
82
83
Quality status of temp. or pressure is high
limit
Temperature: E14
Quality status of temp. or pressure is
constant
Temperature: E15
Pressure: E18
Pressure: E19
See also
Quality byte (Page 133)
140
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
8.2 Modbus interface
8.2.4
Modbus adresses
8.2.4.1
Standard Modbus
● The component value is transferred in IEEE 32 bit floating point format. SITRANS SL
uses two word registers representing a floating point value.
● The measurement counter is transferred in 32 bit integer format. SITRANS SL uses two
Word-Registers representing a 32 bit integer value.
● The time stamp fields (day, hour, minute, and second) are transferred in 16 bit integer
format. SITRANS SL uses one word register representing a 16 bit integer value.
Modbus addresses 30000 ... 39999
Modiconmodbusaddress
Type
Data
Address
Description
30001
Input Register
0
Component 1 – Concentration
Measurement counter
30003
Input Register
2
Component 1 – Concentration
Quality
30004
Input Register
3
Component 1 – Concentration
Value
30006
Input Register
5
Component 1 – Concentration
Time stamp – Day
30007
Input Register
6
Component 1 – Concentration
Time stamp – Hour
30008
Input Register
7
Component 1 – Concentration
Time stamp – Minute
30009
Input Register
8
Component 1 – Concentration
Time stamp – Second
30010
Input Register
9
Component 2 – Transmission
Measurement counter
30012
Input Register
11
Component 2 – Transmission
Quality
30013
Input Register
12
Component 2 – Transmission
Value
30015
Input Register
14
Component 2 – Transmission
Time stamp – Day
30016
Input Register
15
Component 2 – Transmission
Time stamp – Hour
30017
Input Register
16
Component 2 – Transmission
Time stamp – Minute
30018
Input Register
17
Component 2 – Transmission
Time stamp – Second
30019
Input Register
18
Component 3 – Pressure
Measurement counter
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
141
Interfaces to automation systems
8.2 Modbus interface
Modiconmodbusaddress
Type
Data
Address
Description
30021
Input Register
20
Component 3 – Pressure
Quality
30022
Input Register
21
Component 3 – Pressure
Value
30024
Input Register
23
Component 3 – Pressure
Time stamp – Day
30025
Input Register
24
Component 3 – Pressure
Time stamp – Hour
30026
Input Register
25
Component 3 – Pressure
Time stamp – Minute
30027
Input Register
26
Component 3 – Pressure
Time stamp – Second
30028
Input Register
27
Component 4 – Temperature
Measurement counter
30030
Input Register
29
Component 4 – Temperature
Quality
30031
Input Register
30
Component 4 – Temperature
Value
30033
Input Register
32
Component 4 – Temperature
Time stamp – Day
30034
Input Register
33
Component 4 – Temperature
Time stamp – Hour
30035
Input Register
34
Component 4 – Temperature
Time stamp – Minute
30036
Input Register
35
Component 4 – Temperature
Time stamp – Second
30101
Input Register
100
Overall Device Status
30103
Input Register
102
All Device Status Bits.1
30105
Input Register
104
All Device Status Bits.2
30107
Input Register
106
All Device Status Bits.3
30109
Input Register
108
All Device Status Bits.4
Description
Modbus addresses 40000 ... 49999
142
Modiconmodbusaddress
Type
Data
Address
40001
Holding Register
0
Component 3 – Pressure
Quality
40002
Holding Register
1
Component 3 – Pressure
Value in mbar as IEEE 32 bit value
40004
Holding Register
3
Component 4 – Temperature
Quality
40005
Holding Register
4
Component 4 – Temperature
Value in °C as IEEE 32 bit value
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
8.2 Modbus interface
8.2.4.2
Enron Modbus
This section describes the Enron Modbus register group numbers for the SITRANS SL gas
analyzer.
Register numbers are used to identify specific data items to be read or written. Registers are
grouped by data type.
The following table depicts SITRANS SL Enron Modbus register group numbers.
Table 8- 7
Register groups
Register
Type
Description
3000
INTEGER
16 Bit integers
5000
LONG
32 Bit integers
7000
FLOAT
32 Bit IEEE floating point
Note
Offset
As default, for all Enron Modbus registers the offset between the register number and the
data addresses is 1. For example, register number 7001 has data address 1B59 (7001 in
decimal).
There is an optional support for an offset 0.
Modbus addresses 3000 ... 3999
Short Integer registers
Short Integer registers are read using function code 03 or set using function code 16.
Table 8- 8
Short Integer registers
Enron
Modbus
address
Access
Data Address
Description
3001
3002
read
3000
Device Status
read
3001
Component 1 – Concentration
Quality
3003
read
3002
Component 1 – Concentration
Time stamp – Day
3004
read
3003
Component 1 – Concentration
Time stamp – Hour
3005
read
3004
Component 1 – Concentration
Time stamp – Minute
3006
read
3005
Component 1 – Concentration
Time stamp – Second
3007
read
3006
Component 2 – Transmission
Quality
SITRANS SL
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143
Interfaces to automation systems
8.2 Modbus interface
144
3008
read
3007
Component 2 – Transmission
Time stamp – Day
3009
read
3008
Component 2 – Transmission
Time stamp – Hour
3010
read
3009
Component 2 – Transmission
Time stamp – Minute
3011
read
3010
Component 2 – Transmission
Time stamp – Second
3012
read
3011
Component 3 – Pressure
Quality
3013
read
3012
Component 3 – Pressure
Time stamp – Day
3014
read
3013
Component 3 – Pressure
Time stamp – Hour
3015
read
3014
Component 3 – Pressure
Time stamp – Minute
3016
read
3015
Component 3 – Pressure
Time stamp – Second
3017
read
3016
Component 4 – Temperature
Quality
3018
read
3017
Component 4 – Temperature
Time stamp – Day
3019
read
3018
Component 4 – Temperature
Time stamp – Hour
3020
read
3019
Component 4 – Temperature
Time stamp – Minute
3021
read
3020
Component 4 – Temperature
Time stamp – Second
3101
write
3100
Component 3 – Input Pressure
Quality
3102
write
3101
Component 4 – Input Temperature
Quality
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
8.2 Modbus interface
Modbus addresses 5000 ... 5999
Long Integer registers
Access to long integer data is an extension of the Gould Modbus ASCII protocol. Long
Integer registers are read using function code 03
Table 8- 9
Long Integer registers
Enron
Modbus
address
Access
Data Address
Description
5001
read
5000
Component 1 – Concentration
Alarm
5002
read
5001
Component 1 – Transmission
Alarm
5003
read
5002
Component 3 – Pressure
Alarm
5004
read
5003
Component 4 – Temperature
Alarm
5101
read
5100
Component 1 – Concentration
Measurement counter
5102
read
5101
Component 1 – Transmission
Measurement counter
5103
read
5102
Component 3 – Pressure
Measurement counter
5104
read
5103
Component 4 – Temperature
Measurement counter
Modbus addresses 7000 ... 7999
Floating Point registers
Access to floating point data is an extension of the Gould Modbus ASCII protocol. Floating
point registers are read using function code 03 or set using function code 16.
Table 8- 10
Floating Point registers
Modiconmodbusaddress
Type
Data Address
Description
7001
read
7000
Component 1 – Concentration value
7002
read
7001
Component 2 – Transmission value
7003
read
7002
Component 3 – Pressure output value
7004
read
7003
Component 4 – Temperature output value
7101
write
7100
Component 1 – Pressure input value
7102
write
7101
Component 1 – Temperature input value
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
145
Interfaces to automation systems
8.2 Modbus interface
8.2.4.3
Modbus alarm list
The status information is transferred in 32 bit integer words. SITRANS SL uses four WordRegisters representing the detailed status information.
Status Word 1
Status Register description
146
DWORD
BIT position
Description
Error Code
1
0
"No transmission"
E1
1
1
"Low transmission "
E2
1
2
"Receiver power"
E3
1
3
"Receiver junction power"
E4
1
4
"Transmitter power"
E5
1
5
"Startup procedure active"
E6
1
6
"Shutdown procedure active"
-
1
7
"Line locking failure"
E8
1
8
"Save settings active"
E9
1
9
"Process temp. range"
E10
1
10
"Process pressure range"
E11
1
11
"Ext. temperature bad"
E12
1
12
"Ext. temperature low limited"
E13
1
13
"Ext. temperature high limited"
E14
1
14
"Ext. temperature constant"
E15
1
15
"Ext. pressure bad"
E16
1
16
"Ext. pressure low limited"
E17
1
17
"Ext. pressure high limited"
E18
1
18
"Ext. pressure constant"
E19
1
19
"Ext. temp. source disconnected"
E20
1
20
"Ext. pressure. source disconnected"
E21
1
21
"Laser current lower limit"
-
1
22
"Ext. temperature uncertain"
E23
1
23
"Ext. pressure uncertain"
E24
1
24
"PROFIBUS configuration error"
E25
1
25
"PROFIBUS connection error"
E26
1
26
"PROFIBUS master switch off"
E27
1
27
"PROFIBUS internal error"
E28
1
28
"Temp. comp. file range"
E29
1
29
"Prs. comp. file range"
E30
1
30
"CurveFit temp. file range"
E31
1
31
"CurveFit prs. file range"
E32
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Interfaces to automation systems
8.2 Modbus interface
Status Word 2
Status Register description
DWORD
BIT position
Description
Error Code
2
0
"CurveFit gas file range"
E33
2
1
"NH3 outside range"
E34
2
2
"O2 outside range"
E35
2
3
"H2O outside range"
E36
2
4
"HF outside range"
E37
2
5
"H2S outside range"
E38
2
6
"HCl outside range"
E39
2
7
"HCN outside range"
E40
2
8
"CO outside range"
E41
2
9
"CO2 outside range"
E42
2
10
"Temp. outside range"
E43
2
11
"CH4 outside range"
E44
2
12
"FPGA timeout receiver"
E45
2
13
"FPGA timeout receiver junction"
E46
2
14
"FPGA timeout transmitter"
E47
2
15
"Laser unpowered"
E48
2
16
"Transmitter board temperature"
E49
2
17
"Receiver board temperature"
E50
2
18
"Laser board temperature"
E51
2
19
"Detector board temperature"
E52
2
20
"Receiver junction board temperature"
E53
2
21
"Laser vibrator temperature"
E54
2
22
"Analog output test mode"
E55
2
23
"Digital output test mode"
E56
2
24
"EEPROM configuration missing"
E57
2
25
"Save settings failed"
E58
2
26
"Sensor temp. comp. file range"
E59
2
27
"Watchdog reset triggered"
E60
2
28
"LUI unlocked"
E61
2
29
"Hardware inconsistency"
E62
2
30
"A0 outside measurement range"
E63
2
31
"A1 outside measurement range"
E64
SITRANS SL
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147
Interfaces to automation systems
8.2 Modbus interface
Status Word 3
Status Register description
DWORD
BIT position
Description
Error Code
3
0
"Laser drift"
E65
3
1
"Algorithm error"
E66
3
2
"Measurement quality"
E67
3
3
"Line locking failure"
E68
Status Word 4
Not used.
148
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Service and maintenance
9.1
9
Instrument verification
The SITRANS SL should be verified within the time interval stated in the Technical data
(Page 181). This procedure can be done by the customer or the Siemens Service.
The verification of the instrument shall only be performed with the appropriate verification kit
(see accessory list in section "Accessories (Page 193)").
Each verification process should be documented. For this purpose there are verification
sheets included in Verification Sheets (Page 198) of this operating instructions.
If the verification fails, contact Siemens support.
Note
The verification kit is not part of the standard delivery. If you carry out the verification
yourself, you have to order the verification kit additionally.
The zero value (the reading when there is no measurement gas in the measurement path) is
compensated by the signal processing algorithm.
Note
It is not necessary to verify the zero value in field.
See also
Technical data (Page 181)
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9.1 Instrument verification
9.1.1
Verification with the verification tube
The verification tube is intended for the oxygen version of the SITRANS SL (SITRANS SL
O2).
Necessary equipment
● Verification kit
● Sensor connecting cable
If your regular sensor connection cable cannot be removed from the installation, you
need a supplementary one.
● A barometer
to measure the atmospheric pressure
9.1.1.1
Verification tube
①
②
③
Transmitter
Calibration Tube
④
⑤
Receiver
Needle valves
Thermometer
Figure 9-1
Verification tube setup
The verification tube is an interface between the receiver and transmitter as shown in the
previous figure. The kit comprises a metal tube with a temperature sensor and is mounted
between the transmitter tube unit (transmitter) and receiver tube unit (receiver) during
verification. Since the verification tube has no windows, the active path will be the one
between the lenses on either tube unit. There is a small volume behind the lenses on both
sides that must be filled with nitrogen during the calibration. The SITRANS SL O2 is
designed to allow a small leakage into these volumes, and during normal usage they contain
nitrogen. By following the instructions you can assure that they stay filled with nitrogen
during the whole calibration procedure.
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9.1 Instrument verification
9.1.1.2
Span verification
For the span verification of the instrument follow steps 1 through 7 below. This process
should be documented using the form "Verification Sheet" in Appendix A (Page 198).
Step 1: Setup of verification tube
1. Start the procedure by removing the receiver and transmitter from the flanges. Depending
on the prevailing safety conditions and what is more convenient, the power may be kept
on and the sensor connection cable stay connected, or the power may be shut off and the
sensor connection cable be disconnected.
CAUTION
Never disconnect the sensor connection cable with the power switched on.
2. Mount the receiver and transmitter on the verification tube.
3. If the analyzer has been moved to a location with a different ambient temperature than
that at the installation site, you need to wait until it has been adapted to the new
temperature before proceeding from this step. In this way you avoid condensation
problems and assure static and homogeneous temperature distribution in the verification
tube.
4. If necessary, connect the sensor connection cable between the receiver and transmitter
and power up the SITRANS SL.
Step 2: Preparations and LUI settings
In order to document the verification procedure you should fill put the 'Verification sheet' form
thoroughly during verification.
1. Make a copy of the "SITRANS SL O2 Verification sheet" form you can find in Appendix A.
2. Fill out the first part (General Information).
3. Enter the password to access the Local User Interface (LUI).
Note
Remember to write down the original values before making alterations to the settings!
4. Note the current integration time in the verification sheet. Set the integration time to 20 s.
5. Note the settings for the path length in the verification sheet. Set the path length to 0.450
m which is the effective length in the verification tube. Notice that this is valid with the inline reference cell in place.
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9.1 Instrument verification
6. Note pressure source settings and, if applicable, pressure manual value in the verification
sheet. Set the pressure source to "manual" and enter the ambient pressure as manual
value.
Note this value also in the verification sheet.
7. Note temperature source settings and, if applicable, temperature manual value in the
verification sheet. Set the temperature source to "manual".
Note this value also in the verification sheet.
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Verification set point for different relative humidities and temperatures.
Note
If you do not use dry air, your oxygen concentration is lower due to the air moisture.
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9.1 Instrument verification
8. If you use ambient air, you can correct the verification set point according to the air
moisture. Look for the ambient temperature on the x-axis of Fig. 9-2. Go vertically up to
the line of the present ambient relative humidity. Go left horizontally and find your
verification set point on the y-axis. Note this value in the "Verification Sheet".
With pressurized air of unknown moisture content you there is a higher uncertainty for the
verification set point. A good estimate is ±0.3 Vol%. O2. Note this value in the verification
sheet.
CAUTION
Use a hygrometer and a thermometer at the site where you take the ambient air. The
humidity must be measured at the temperature at which the verification is performed. If
for example the outside temperature is 0 °C and the relative humidity close to 100 %,
the relative humidity indoors at normal room temperature might only be around 20 %.
9. Enter the appropriate values for the verification errors: Instrument error (according to the
instrument specifications), temperature error and pressure error.
Temperature and pressure error depend on your measurement. If the system and the
purging gas used are well tempered you can use the error of the thermometer itself:
1 °C.For the pressure error refer to the reading of your barometer.
10.Calculate the total uncertainty of the measurement by adding instrument error, pressure
error, and temperature error.
CAUTION
Temperature and pressure influence on the verification procedure
It is very important to enter the accurate values of ambient pressure, temperature and
humidity. As a rule of thumb you need the same accuracy of the pressure or
temperature values as you expect from verification tolerance.
The value of 20.95 % is the relative concentration of oxygen in the atmosphere but the
absolute value will vary due to the barometric pressure or temperature. As an example in recent years the barometric pressure in Gothenburg, Sweden, which is at sea level,
varied between a maximum of 1 052 hPa and a minimum of 950 hPa which corresponds
to uncorrected oxygen readings between 21.78 % and 19.67 %. Although these are
extreme values they point out the importance of having an accurate pressure value
inside the tube.
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9.1 Instrument verification
Step 3: Purging with Nitrogen
Note
In the instruction it is assumed that totally oxygen free nitrogen is used. The concentration
value of the SITRANS SL during this procedure will not be lower than the oxygen content in
the nitrogen.
1. Attach your source of purging gas (N2) to the needle valve on either the receiever or
transmitter side.
2. Close the other needle valve.
3. Purge the verification tube until the concentration value falls below 0.05 Vol% O2. The
gas flow should be in a range of 4-10 l/min and the pressure of the nitrogen between
2 and 5 bar absolute. The gas should escape trough the two capillaries on the receiver
and transmitter.
4. Close the needle valve. Wait for 10 minutes. After this time the O2 value should not have
increased to more than 0.15 Vol%. If the O2 value exceeds this limit refer to section
(Problem handling: insufficient purging) at the end of this chapter for further proceedings.
5. Remove the needle valve completely on either the receiver and transmitter side. This is
necessary to avoid any over pressure in the tube.
6. Fill the verification tube according to one of the two alternatives below.
Step 4a: Filling the verification tube with ambient air
1. Disconnect both the receiver and the transmitter from the verification tube. Verification
must be performed within 10 minutes from this step to prevent air from entering into the
volume behind the lenses.
2. Swing the verification tube a few times in the air to remove the purging gas from the tube
and fill it with ambient air. Also swing the receiver and the transmitter a few times
carefully.
3. Wait for about 60 seconds.
4. Reconnect the receiver and transmitter to the verification tube. Be careful not to allow any
other gas than air to enter the tube, including breath.
Step 4b: Filling the verification tube with pressurized air
1. Disconnect the nitrogen source.
2. Attach your source of dry, oil free, pressurized air to the needle valve on either of the
receiver or transmitter side, and purge with a volume flow of approx. 4 liters/minute.
Verification must be performed within 10 minutes from this step to prevent air from
entering into the volume behind the lenses.
3. Purge until the concentration value stabilizes (concentration changes less than 0.1 vol %
/ minute) and then turn off the gas.
4. Set the manual temperature value in the LUI to the temperature displayed by the
thermometer.
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9.1 Instrument verification
Step 5: Verification
1. Watch or record the measured value for at least 20 seconds to ensure that it is stable (i.
e. concentration varies not more than ±0.05 vol % / minute).
2. Take 5 successive concentration values and write them into the verification sheet.
3. If the difference between the highest and the lowest concentration value is more than the
maximum repeatability value (see technical data (Page 181)), the measurements must be
repeated.
4. Compare the average of the 5 values with the verification set point. If it lies within the
range between the set point and the total verification uncertainty, the instrument works
properly.
If the average value lies outside this range, please contact Siemens support.
5. Put the removed needle valve back into place and close it.
Repeat all steps of one of the paragraphs "Filling the verification tube with ambient air" or
"Filling the verification tube with pressurized air" as described before.
6. If the difference between measured value and verification point is more than 0.4 vol % O2
the verification procedure should be repeated from the start.
Step 6: Purging with nitrogen
To make sure that the instrument was purged well all the time during the verification
procedure another purging procedure with nitrogen is necessary. To do so:
1. Attach your nitrogen source to the remaining needle valve once more.
2. Purge the verification tube for about 5 minutes until the concentration value falls well
below 0.2 vol % O2. The gas flow should be approx. 4 l/min.
If the O2 concentration value does not fall below 0.2 vol % O2 it is obvious that too much
oxygen has entered the volume behind the lenses during verification. The verification
procedure should be repeated from the start.
3. Close the needle valve. Wait for 10 minutes. After this time the O2 concentration value
should not have increased to more than 0.15 vol % O2.
4. Note this value in the verification sheet.
Step 7: Restore
1. Restore path length, pressure correction and temperature correction to original settings
according to the notes taken.
2. After restoring correction settings, press
when you are asked to save.
button repeatedly to exit the menu. Select OK
3. Reinstall the receiver and transmitter at the industrial interfaces.
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9.1 Instrument verification
Troubleshooting: Insufficient purging
If the oxygen concentration in the verification tube moves above 0.15 vol % after having
been purged with nitrogen, this may be due to an elevated oxygen content inside the
housing units. To remove that oxygen you can follow one of the two procedures below
depending on your permission to open the lids of the housing. If you are not permitted to
open the lids, you shall just keep on purging the verification tube with nitrogen until all
oxygen in the housing is gone. This may take several hours or even a whole day. Thus the
purging should be interrupted from time to time to test if the oxygen content has fallen below
0.15 vol %. If the test result is above 0.15 vol % within a 10 minutes time you must continue
purging with nitrogen.
If you are permitted to open the lids, you should first turn on the nitrogen flow. Then open the
lids such that the gas can easily enter the gap between lid and housing, but without risk of
the lids falling off. After 15 minutes of nitrogen purging the housing should be free of oxygen.
After purging first close the lids. Then turn off the nitrogen and wait for 10 minutes. If the
oxygen value remains below 0.15 vol %, the problem is solved. If not, repeat the procedure.
See also
Technical data (Page 181)
Verification Sheets (Page 198)
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9.1 Instrument verification
9.1.2
Verification with a verification cell
The verification cell is intended for the carbon monoxide version of the SITRANS SL
(SITRANS SL CO).
The verification module is mounted between the transmitter tube unit (transmitter) and
receiver tube unit (receiver) during verification. The verification kit consists of a metal tube
and a gas filled glass cell with a defined gas concentration stated in the corresponding
certificate.
9.1.2.1
Span verification
For the span verification of the instrument follow steps 1 through 3 below. This process
should be documented using the form "Verification Sheet" in Appendix A.
Necessary equipment
● Verification kit
● Sensor connecting cable
If your regular sensor connection cable cannot be removed from the installation, you
need a supplementary one.
Step 1: Setup of verification tube
1. Start the procedure by removing the receiver and transmitter from the flanges. Depending
on the prevailing safety conditions and what is more convenient, the power may be kept
on and the sensor connection cable stay connected, or the power may be shut off and the
sensor connection cable be disconnected.
CAUTION
Never disconnect the sensor connection cable with the power switched on.
2. Mount the receiver and transmitter on the verification tube.
3. If the analyzer has been moved to a location with a different ambient temperature than
that at the installation site, you need to wait until it has been adapted to the new
temperature before proceeding from this step. In this way you avoid condensation
problems and assure static and homogeneous temperature distribution in the calibration
tube.
4. If necessary, connect the sensor connection cable between the receiver and transmitter
and power up the SITRANS SL.
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9.1 Instrument verification
Step 2: Preparations and LUI settings
In order to document the verification procedure you should fill out the 'SITRANS SL CO
Verification sheet' form thoroughly during verification.
1. Make a copy of the "Verification sheet" form you can find in Annex A.
2. Fill out the first part (General Information).
3. Enter the password to access the Local User Interface (LUI) using the remote control.
NOTICE
Remember to write down the original values before making any alterations to the
settings!
4. Note the current integration time in the verification sheet. Set the integration time to 20 s.
5. Note the settings for the path length in the verification sheet. Set the path length to the
value stated in the certificate. Notice that this is valid with the in-line reference cell in
place.
Note this value also in the verification sheet.
6. Note pressure source settings and, if applicable, pressure manual value in the verification
sheet. Set the pressure source to "manual" and enter the value stated in the certificate.
Note this value also in the verification sheet.
7. Note temperature source settings and, if applicable, temperature manual value in the
verification sheet. Set the temperature source to "manual" and set the temperature
manual value to the ambient temperature.
Note this value also in the verification sheet.
8. Enter the appropriate values for the verification errors: Instrument error (according to the
instrument specifications), and temperature error.
The temperature error depends on your measurement. If the system and the purging gas
used are well tempered, you can use the error of the thermometer itself: 1 °C.
9. Calculate the total uncertainty of the measurement by adding instrument error, and
temperature error.
CAUTION
Temperature influence on the verification procedure
It is very important to enter the accurate temperature values. As a rule of thumb you
need the same accuracy of the temperature values you expect for your verification
tolerance.
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9.1 Instrument verification
Step 3: Verification
1. Watch or record the measured value for at least 20 seconds to ensure that it is stable (i.
e. concentration varies not more than ±1 vol % of the reading).
2. Take 5 successive concentration values and write them into the verification sheet.
3. If the difference between the highest and the lowest concentration value is more than
1 %, the measurements must be repeated.
4. Compare the average of the 5 values with the verification set point stated in the
certificate. If it lies within the range between the set point and the total verification
uncertainty, the instrument works properly.
If the average value lies outside this range, repeat the verification procedure. If the test
still fails, contact Siemens support providing the filled-out verification sheet will all
verification results.
See also
Verification Sheets (Page 198)
9.1.3
Verification of systems used in hazardous areas
Verification setup
Verifying the system requires that it is mounted to the verification module.
WARNING
 If the verification is to be carried out in the hazardous area be sure to confirm with the
plant manager that it is safe to do so (hot work permit)!
 The thermometer is neither ATEX nor FM certified. If the thermometer therefore must be
removed, the hole where the thermometer was attached should be plugged and the
temperature measured with some other device.
Note
The verification kit is not part of the standard delivery. If you carry out the calibration
verification for your own, you have to order the verification kit additionally.
Procedure
1. The sensor and transmitter have to be dismounted from the measuring setup.
2. If necessary the cables in the receiver and the transmitter have to be disconnected. The
units have then to be moved to an appropriate location for verification. The sensors must
then be reconnected to each other using a sensor connection cable.
3. Verify the system as described in sections before.
4. Reinstall in reverse order.
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9.2 Cleaning the optical parts of the sensor
9.2
Cleaning the optical parts of the sensor
Preparations
WARNING
Danger of burns
Due to hot process gases and/or purging media the sensors and their environment can
become very hot. This applies particularly when steam is used for purging since overheated
steam is not visible!
Before you start cleaning the optical parts of the sensor make sure that
 no purging is under way
 no hazardous or hot gases can escape from the process
 you are sufficiently protected against hot surfaces on and around the sensor, e.g. by
using protective gloves
Failure to do so may result in severe burns!
Cleaning of the process interface window on the process side
1. Demount the process interface, also demount the purging tube if applicable.
WARNING
Dangerous or pressurized process
Before you start demounting the process interface make sure that the process
conditions are safe, e.g. there are no more pressure or dangerous substances on the
process side.
2. Remove all dust particles using pressurized air or flushing water.
3. Clean the optical surface with a soft cloth. Water with a small amount of soap or a mild
detergent also works fine in many cases.
Start the cleaning process at the center and work with circular movements towards the
rim.
4. To remount the process interface, refer to section Installation . Also a new alignment of
the sensors has to be carried out.
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9.2 Cleaning the optical parts of the sensor
Cleaning of lens or the process interface window on the sensor side
1. Use an appropriate tool to release the clamp ring –– and pull the sensor out.
2. Remove all dust particles using pressurized air or flushing water.
3. Clean the optical surfaces with a soft cloth. Water with a small amount of soap or a mild
detergent also works fine in many cases. Start the cleaning process at the center and
work with circular movements towards the rim.
4. When remounting the sensor, make sure that the guide pin fits the hole on the purging
flange. Screw on the lock ring and tighten it gently with the tool.
If this operation is performed properly, it will not affect the alignment of the sensor.
NOTICE
Any work with the optical lens requires utmost care. The lens is anti-reflection coated and
thus very susceptible to scratches!
See also
Mounting (Page 40)
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9.2 Cleaning the optical parts of the sensor
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10
Alarm, error, and system messages
10.1
Alarm
Introduction
In this chapter the word 'alarm' is used as a general term without referring to the alarm level,
i.e. if it is a failure, a warning or just informative. The actions to be taken when an alarm
trigged are specific to each alarm.
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Alarm, error, and system messages
10.1 Alarm
Alarm Triggering
Generally a SITRANS SL alarm has three parameters:
● Triggering level
● Triggering time (TSet)
● Reset time (TRes)
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Alarms with different behaviours or configurations are handled later in this chapter under the
alarm description.
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Alarm, error, and system messages
10.1 Alarm
Reporting the Alarm
Binary outputs
For each alarm it is possible to select if it should affect none, one or both of the relays.
Configuration for both outputs can be edited using the LUI user interface.
Analog outputs
For each output, actions can be set up for the following cases:
● Maintenance Fault
● Maintenance Demanded
● Process Value Fault
● Process Value Warning
● Process Value Tolerance
● No Data Exchange
● Local Override
● Device Unlocked
● Configuration Warning
Possible actions:
● Off (present measured value)
● Latest (freeze on the last presented value)
● Default level (set to a predefined default level)
● 3mA (NAMUR NE43 failstate)
PROFIBUS and Modbus
PROFIBUS and Modbus have two ways of reporting a problem, quality indication and alarm.
Quality indication that comes with every cyclic data (measurements) and is either a value or
one of the following states:
● Good
● Uncertain
● Bad
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Alarm, error, and system messages
10.1 Alarm
LUI
The lower half of the measurement view (i.e. the standard view) of the LUI is designated for
the alarm display. Once an alarm has been triggered the alarm text is displayed together
with an icon. The icon indicates type and level of the alarm.
If several alarms are simultaneously active, the most serious alarm is displayed. To indicate
that there are more than one alarm active, the icons of for all active alarms appear
alternately but the displayed text always refers to the most serious alarm. To scroll through
key.
the list of active alarms repeatedly press the
Start-up Failure
Relays are not activated until system has completed the start-up procedure, i.e. the alarms
go inactive when the system works properly.
When being operated via PROFIBUS or Modbus, the PLC will notice that the SITRANS SL is
missing on the bus if it does not start. In that case the PLC can generate an alarm.
States and Symbols
An alarm display on the LUI consists of a text and an icon to the left of the text. The icon
indicates type and level of an alarm.
Icon
Description
Maintenance fault
The device is in immediate need for maintenance. Measurement values cannot
be produced.
Example: Transmission too low for measurement due to contamination or
misalignment
Maintenance demanded
The device is in need for maintenance to assure continuous operation.
Measurement values are produced but may be uncertain.
Example: Transmission is low due to contamination or misalignment
Maintenance required
N/A
Process value fault
Measurement values cannot be produced due to a problem with one or more
process values.
Examples: Malfunction of an external sensor. A process value is outside the
limits of the compensation files.
Process value warning
Measurement values are produced but may be uncertain due to a problem with
one or several process values.
Example: A process value exceeds the specification of the device.
Process value tolerance
One or more process values have reached a tolerance limit.
Example: An external sensor reports an uncertain quality code.
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Alarm, error, and system messages
10.1 Alarm
Configuration fault
The device cannot operate due to invalid configuration of parameters or
hardware.
Configuration warning
Device might work, but one or more parameters are invalid. Default values are
used instead.
Configuration changed
N/A
Local override
Output values are not actual measurements.
Example: Test mode is active for an output.
Simulation or substituted value
N/A
Out of operation
N/A
Data exchange
Indicates irregular data communication
Example: The software is executing save settings.
No data exchange
Communication failure.
Example: PROFIBUS master has been switched of.
Write access on/off
Write access on is used to indicate that the Local User Interface is unlocked.
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Alarm, error, and system messages
10.1 Alarm
Alarm groups
The alarm groups are the base for alarm reporting on the conventional interface, i.e. relay
outputs and failure signalling on analog outputs. The alarm groups are also used in the
logbook.
LUI
Groups
G1
External sensor
G2
Receiver temperature
G3
Transmitter temperature
G4
Reference line
G5
Transmitter tube unit
G6
Service
G7
Transmission
G8
Receiver electronics
G9
Transmitter electronics
G10 Measurement out of range
G11 Configuration error
G12 Internal communication
G13 PROFIBUS client
The allocation of a specific alarm to its LUI alarm group is shown in table 10-1 "Alarm list
(Page 170)".
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10.1 Alarm
Log book
In the log book there are some more groups
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Alarm, error, and system messages
10.2 Alarm list
10.2
Alarm list
SITRANS SL can produce alarms from the following list.
Symbol/Group
Error
Code
Alarm (description)
Explanation/Action
E6
Startup procedure active
The system is starting up. This alarm should disappear
when system has started.
During normal ambient conditions the SITRANS SL
should have started up within 5 minutes. Ensure that the
ambient conditions are within the specifications for the
SITRANS SL and restart the system if needed.
E8
Line locking failure
The SITRANS SL has failed to lock on to the built in
reference cell.
Ensure that the ambient conditions are within the
specifications for the SITRANS SL and restart the
system. If the fault remains, contact Siemens support.
E45
FPGA timeout receiver
Internal communication failure in the Receiver.
E46
FPGA timeout receiver junction
Internal communication failure in the Receiver.
E47
FPGA timeout transmitter
Sensor connection cable communication failure.
E48
Laser unpowered
The SITRANS SL has stopped measuring to protect the
laser from getting too hot.
Restart the system. If the fault remains, contact Siemens
support.
Restart the system. If the fault remains, contact Siemens
support.
Check that sensor connection cable is properly
connected and not damaged.
The system may have been exposed to an ambient
temperature higher than permitted. Check that the
ambient temperature is within the specifications and
ensure that the system is not exposed to direct sunlight.
Restart the system.
E66
Curve fit algorithm
The curve fit algorithm fails due to laser drift.
E68
Line locking failure
The line locking state machine ended up in a fault state.
Ensure that the ambient conditions are within the
specifications for the SITRANS SL and restart the
system. If the fault remains, contact Siemens support.
Restart the system. If the fault remains, contact Siemens
support.
170
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Alarm, error, and system messages
10.2 Alarm list
Symbol/Group
Error
Code
Alarm (description)
Explanation/Action
E2
Low transmission
The system has been in transmission pending mode for
too long. In transmission pending mode the analyzer will
only regulate the laser temperature from the calculated
drift.
Ensure sufficient transmission by cleaning optical
surfaces and re-alignment of the sensors.
E3
Receiver power
The power supply to the receiver is interrupted or not
sufficient.
Check the cabling to the receiver.
E4
Receiver junction power
The power supply to the receiver is interrupted or not
sufficient.
Check the cabling to the receiver.
E5
Transmitter power
The power supply to the transmitter is interrupted or not
sufficient.
Check the cabling to the transmitter.
E49
Transmitter board temperature
Transmitter board temperature outside valid range.
E50
Receiver board temperature
The receiver board temperature is outside the valid
range.
Check that the ambient temperature is within the
specifications and ensure that the system is not exposed
to direct sunlight.
Check that the ambient temperature is within the
specifications and ensure that the system is not exposed
to direct sunlight.
E51
Laser board temperature
E52
Detector board temperature
The laser board temperature is outside the valid range.
Check that the ambient temperature is within the
specifications and ensure that the system is not exposed
to direct sunlight.
The detector board temperature is outside the valid
range.
Check that the ambient temperature is within the
specifications and ensure that the system is not exposed
to direct sunlight.
E53
Receiver junction board
temperature
E54
Laser vibrator temperature
E62
Hardware Inconsistency
The receiver Junction board temperature is outside the
valid range.
Check that the ambient temperature is within the
specifications and ensure that the system is not exposed
to direct sunlight.
The vibrator temperature is outside the valid range.
Check that the ambient temperature is within the
specifications and ensure that the system is not exposed
to direct sunlight.
Mismatch between receiver and transmitter versions e.g.
when either the receiver or the transmitter has been
replaced.
Contact Siemens support.
E65
Laser drift
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
The laser is getting close to the limit of operation.
Contact Siemens support.
171
Alarm, error, and system messages
10.2 Alarm list
Symbol/Group
Error
Code
Alarm (description)
E1
No transmission
E12
Ext. temperature bad
Explanation/Action
Transmission is too low.
The dust level in the optical path may be too high. If the
fault remains at good visibility it may be necessary to
clean the process windows and verify alignment.
The state of the digital input indicates that the
temperature value from the external sensor is bad.
Solve the problem caused by the external temperature
sensor.
E16
Ext. pressure bad
The state of the digital input indicates that the pressure
value from the external sensor is bad.
Solve the problem caused by the external sensor.
E20
Ext. temperature source
disconnected
E21
Ext. pressure source disconnected
E29
Compensation temp. file range
Configuration Error.
Contact Siemens support.
Configuration Error.
Contact Siemens support.
The process temperature deviates from the operational
range of this SITRANS SL application. The deviation is
so large that no measurement value can be produced.
Delimit process temperature or verify that the
temperature sensor produces correct measurements.
E30
Compensation pressure file range
The process pressure deviates from the operational
range of this SITRANS SL application. The deviation is
so large that no measurement value can be produced.
Delimit process pressure or verify that the pressure
sensor produces correct measurements.
E31
CurveFit temp. file range
The process temperature deviates from the operational
range of this SITRANS SL application. The deviation is
so large that no measurement value can be produced.
Delimit process temperature or verify that the
temperature sensor produces correct measurements.
E32
CurveFit pressure file range
The process pressure deviates from the operational
range of this SITRANS SL application. The deviation is
so large that no measurement value can be produced.
Delimit process pressure or verify that the pressure
sensor produces correct measurements.
E33
CurveFit gas file range
Internal error when reading the curve fit compensation
file.
Contact Siemens support.
E59
Sensor temp. comp. file range
The ambient temperature at the sensor is outside the
specifications.
Check that the ambient temperature is within the
specifications and ensure that the system is not exposed
to direct sunlight.
E63
A0 outside measurement range
The current measurement value is outside the scaling
range for the analog output signal.
Change the scaling of the analog output.
E64
A1 outside measurement range
The current measurement value is outside the scaling
range for the analog output signal.
Change the scaling of the analog output.
172
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Alarm, error, and system messages
10.2 Alarm list
Symbol/Group
Error
Code
Alarm (description)
Explanation/Action
E10
Process temp. range
The process temperature input is out of the range
specified for the application.
E11
Process pressure range
The process pressure is out of the range specified for the
application.
E13
Ext. temperature low limited
The analog input from the temperature sensor is out of
range.
E14
Ext. temperature high limited
The analog input from the temperature sensor is out of
range.
Check the process temperature.
Check the process pressure.
Check the connected temperature sensor.
Check the connected temperature sensor.
E17
Ext. pressure low limited
The analog input from the pressure sensor is out of
range.
Check the connected pressure sensor.
E18
Ext. pressure high limited
The analog input from the pressure sensor is out of
range.
Check the connected pressure sensor.
E35
O2 outside range
Currently calculated gas concentration is outside the valid
range for this application.
Check whether the measured gas concentration is
reasonable. If so, contact Siemens support to evaluate if
the measuring range can be increased. If the
concentration seems incorrect it may be necessary to
check path length, temperature correction and pressure
correction.
E41
CO outside range
Currently calculated gas concentration is outside the valid
range for this application.
Check whether the measured gas concentration is
reasonable. If so, contact Siemens support to evaluate if
the range can be increased. If the concentration seems
incorrect it may be necessary to check path length,
temperature correction and pressure correction.
E67
Measurement quality
The optical power is too low, or the input signal too noisy
at the detector to guarantee an accurate measurement.
Clean the process windows and verify alignment. Also
make sure that the process gas is not too turbulent or the
purging rate too high.
E15
Ext. temperature constant
The external temperature source signal is frozen.
E19
Ext. Pressure constant
The external pressure source signal is frozen.
E23
Ext. temperature uncertain
The external temperature source signal is not reliable.
E24
Ext. pressure uncertain
The external pressure source signal is not reliable.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Check the connected temperature sensor.
Check the connected pressure sensor.
Check the connected temperature sensor.
Check the connected pressure sensor.
173
Alarm, error, and system messages
10.2 Alarm list
Symbol/Group
Explanation/Action
Error
Code
Alarm (description)
E57
EEPROM configuration missing
E58
Save settings failed
E09
Save settings active
Configuration changed
E55
Analog output test mode
The test mode for analog outputs is active
E56
Digital output test mode
The test mode for digital outputs is active
E25
PROFIBUS configuration error
E26
PROFIBUS connection error
E27
PROFIBUS master switch off
PROFIBUS Master Switch Off.
E28
PROFIBUS internal error
PROFIBUS internal error.
E61
LUI unlocked
The LUI is unlocked and has no password protection.
E60
Watchdog reset triggered
The analyzer has been reset due to a triggered watchdog
event.
EEPROM configuration missing.
Contact Siemens support.
Save settings failed.
Contact Siemens support.
PROFIBUS configuration fault.
Contact PLC support.
PROFIBUS Connection Error.
Check that PROFIBUS cables are properly connected.
Contact PLC support. Check the PROFIBUS master
switch.
Contact Siemens support.
Lock the LUI.
This alarm is automatically cleared at the screen after
restart of the system. The alarm will still be visible in the
logbook.
174
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Operating Instructions, 12/2010, A5E01132948-04
Alarm, error, and system messages
10.2 Alarm list
Table 10- 1
Error
Code
Alarm list sorted by Error Codes
Alarm (description)
Alarm Application Status
LUI Group
E1
No transmission
Process value fault
G7
E2
Low transmission
Maintenance demanded
G7
E3
Receiver power
Maintenance demanded
G2
E4
Receiver junction power
Maintenance demanded
G2
E5
Transmitter power
Maintenance demanded
G5
E6
Startup procedure active
Maintenance fault
G4
E8
Line locking failure
Maintenance fault
G4
E9
Save settings active
Service
G6
E10
Process temp. range
Process value warning
G10
E11
Process pressure range
Process value warning
G11
E12
Ext. temperature bad
Process value fault
G1
E13
Ext. temperature low limited
Process value warning
G1
E14
Ext. temperature high limited
Process value warning
G1
E15
Ext. temperature constant
Process value tolerance
G1
E16
Ext. pressure bad
Process value fault
G1
E17
Ext. pressure low limited
Process value warning
G1
E18
Ext. pressure high limited
Process value warning
G1
E19
Ext. pressure constant
Process value tolerance
G1
E20
Ext. temperature source disconnected
Process value fault
G1
E21
Ext. pressure source disconnected
Process value fault
G1
E23
Ext. temperature uncertain
Process value tolerance
G1
E24
Ext. pressure uncertain
Process value tolerance
G1
E25
PROFIBUS configuration error
Data exchange / No data exchange
G13
E26
PROFIBUS connection error
Data exchange / No data exchange
G13
E27
PROFIBUS master switch off
Data exchange / No data exchange
G13
E28
PROFIBUS internal error
Data exchange / No data exchange
G13
E29
Compensation temp file range
Process value fault
G10
E30
Compensation prs file range
Process value fault
G10
E31
CurveFit temp. file range
Process value fault
G10
E32
CurveFit pressure file range
Process value fault
G10
E33
CurveFit gas file range
Process value fault
G10
E35
O2 outside range
Process value warning
G10
E41
CO outside range
Process value warning
G10
E45
FPGA timeout receiver
Maintenance fault
G12
E46
FPGA timeout receiver junction
Maintenance fault
G12
E47
FPGA timeout transmitter
Maintenance fault
G12
E48
Laser unpowered
Maintenance fault
G5
E49
Transmitter board temperature
Maintenance demanded
G5
E50
Receiver board temperature
Maintenance demanded
G2
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Operating Instructions, 12/2010, A5E01132948-04
175
Alarm, error, and system messages
10.2 Alarm list
Error
Code
Alarm (description)
Alarm Application Status
LUI Group
E51
Laser board temperature
Maintenance demanded
G5
E52
Detector board temperature
Maintenance demanded
G2
E53
Receiver junction board temperature
Maintenance demanded
G2
E54
Laser vibrator temperature
Maintenance demanded
G5
E55
Analog output test mode
Local override
G6
E56
Digital output test mode
Local override
G6
E57
EEPROM configuration missing
Configuration warning
G11
E58
Save settings failed
Configuration warning
G11
E59
Sensor temp. comp. file range
Process value fault
G10
E60
Watchdog reset triggered
Service
G6
E61
LUI unlocked
Data exchange / No data exchange
G6
E62
Hardware inconsistency
Maintenance demanded
G6
E63
A0 outside measurement range
Process value fault
G10
E64
A1 outside measurement range
Process value fault
G10
E65
Laser drift
Maintenance demanded
G5
E66
CurveFit algorithm
Maintenance fault
G5
E67
Measurement quality
Process value warning
G4
E68
Line locking failure
Maintenance fault
G4
176
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Alarm, error, and system messages
10.3 PROFIBUS diagnosis and alarms
10.3
PROFIBUS diagnosis and alarms
10.3.1
Diagnosis and alarm handling in PROFIBUS DP
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SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
177
Alarm, error, and system messages
10.3 PROFIBUS diagnosis and alarms
10.3.2
Meaning of the diagnosis information
Standard PROFIBUS-DP mechanisms are used to transport diagnosis information and to
signal actively to the class 1 master. The DIAGNOSIS parameter from the Physical Block is
then available to the master as diagnostic information.
To view the diagnosis information from PROFIBUS, the module information of the DP slave
is viewed and the respective text from the GSD file is displayed on the DP slave diagnostics
screen.
The following table shows the assignment of the error signals and maintenance requests
from the device to the diagnosis bits of the physical block in the GSD file and the related
error code. The explanation and proposed remedial actions for each error code can be found
in the Alarm list section.
Bit position
Error text message in GSD file
Error Code
Unit_Diag_Bit(16)
"Status appears"
-
Unit_Diag_Bit(17)
"Status disappears"
-
Unit_Diag_Bit(24)
"No transmission"
E1
Unit_Diag_Bit(25)
"Low transmission"
E2
Unit_Diag_Bit(26)
"Receiver power"
E3
Unit_Diag_Bit(27)
"Receiver junction power"
E4
Unit_Diag_Bit(28)
"Transmitter power"
E5
Unit_Diag_Bit(29)
"Startup procedure active"
E6
Unit_Diag_Bit(30)
"Shutdown procedure active"
-
Unit_Diag_Bit(31)
"Line locking failure"
E8
Unit_Diag_Bit(32)
"Save settings active"
E9
Unit_Diag_Bit(33)
"Process temp. range"
E10
Unit_Diag_Bit(34)
"Process pressure range "
E11
Unit_Diag_Bit(35)
"Ext. temperature bad"
E12
Unit_Diag_Bit(36)
"Ext. temperature low limited"
E13
Unit_Diag_Bit(37)
"Ext. temperature high limited"
E14
Unit_Diag_Bit(38)
"Ext. temperature constant"
E15
Unit_Diag_Bit(39)
"Ext. pressure bad"
E16
Unit_Diag_Bit(40)
"Ext. pressure low limited"
E17
Unit_Diag_Bit(41)
"Ext. pressure high limited"
E18
Unit_Diag_Bit(42)
"Ext. pressure constant"
E19
Unit_Diag_Bit(43)
"Ext. temp. source disconnected"
E20
Unit_Diag_Bit(44)
"Ext. prs. source disconnected"
E21
Unit_Diag_Bit(45)
"Laser current lower limit"
-
Unit_Diag_Bit(46)
"Ext. temperature uncertain"
E23
Unit_Diag_Bit(47)
"Ext. pressure uncertain"
E24
Unit_Diag_Bit(48)
"PROFIBUS configuration error"
E25
Unit_Diag_Bit(49)
"PROFIBUS connection error"
E26
Unit_Diag_Bit(50)
"PROFIBUS master switch off"
E27
Unit_Diag_Bit(51)
"PROFIBUS internal error "
E28
Unit_Diag_Bit(52)
"Temp. comp. file range"
E29
178
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Operating Instructions, 12/2010, A5E01132948-04
Alarm, error, and system messages
10.3 PROFIBUS diagnosis and alarms
Bit position
Error text message in GSD file
Error Code
Unit_Diag_Bit(53)
"Prs. comp. file range"
E30
Unit_Diag_Bit(54)
"CurveFit temp. file range"
E31
Unit_Diag_Bit(55)
"CurveFit prs. file range"
E32
Unit_Diag_Bit(56)
"CurveFit gas file range"
E33
Unit_Diag_Bit(57)
"NH3 outside range"
E34
Unit_Diag_Bit(58)
"O2 outside range"
E35
Unit_Diag_Bit(59)
"H2O outside range"
E36
Unit_Diag_Bit(60)
"HF outside range"
E37
Unit_Diag_Bit(61)
"H2S outside range"
E38
Unit_Diag_Bit(62)
"HCl outside range"
E39
Unit_Diag_Bit(63)
"HCN outside range"
E40
Unit_Diag_Bit(64)
"CO outside range"
E41
Unit_Diag_Bit(65)
"CO2 outside range"
E42
Unit_Diag_Bit(66)
"Temperature outside range"
E43
Unit_Diag_Bit(67)
"CH4 outside range"
E44
Unit_Diag_Bit(68)
"FPGA timeout receiver"
E45
Unit_Diag_Bit(69)
"FPGA timeout receiver junction"
E46
Unit_Diag_Bit(70)
"FPGA timeout transmitter"
E47
Unit_Diag_Bit(71)
"Laser unpowered "
E48
Unit_Diag_Bit(72)
"Transmitter board temperature"
E49
Unit_Diag_Bit(73)
"Receiver board temperature"
E50
Unit_Diag_Bit(74)
"Laser board temperature"
E51
Unit_Diag_Bit(75)
"Detector board temperature"
E52
Unit_Diag_Bit(76)
"Receiver junction board temp."
E53
Unit_Diag_Bit(77)
"Laser vibrator temperature"
E54
Unit_Diag_Bit(78)
"Analog output test mode"
E55
Unit_Diag_Bit(79)
"Digital output test mode"
E56
Unit_Diag_Bit(80)
"EEPROM configuration missing"
E57
Unit_Diag_Bit(81)
"Save settings failed"
E58
Unit_Diag_Bit(82)
"Sensor temp. comp. file range"
E59
Unit_Diag_Bit(83)
"Watchdog reset triggered"
E60
Unit_Diag_Bit(84)
"LUI unlocked"
E61
Unit_Diag_Bit(85)
"Hardware inconsistency"
E62
Unit_Diag_Bit(86)
"A0 outside measurement range"
E63
Unit_Diag_Bit(87)
"A1 outside measurement range"
E64
Unit_Diag_Bit(88)
"Laser drift"
E65
Unit_Diag_Bit(89)
"Algorithm error"
E66
Unit_Diag_Bit(90)
"Measurement quality"
E67
Unit_Diag_Bit(91)
"Line locking failure"
E68
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Alarm, error, and system messages
10.3 PROFIBUS diagnosis and alarms
180
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
11
Technical data
11.1
Technical data
General
Design
Transmitter and receiver units, connected by a sensor
connection cable
Materials



Sensor enclosure: treated aluminium/stainless steel
Process interface: acid-resistant stainless steel
Window: hardened borosilicate glass
Installation
In-situ or bypass
Concentration units



Display
Digital concentration display
(4 digits with floating decimal point)
Laser protection class
Class 1, safe to the eye
ppm
vol %
mg/Nm3
Analytical performance
Measuring range
Internally adjustable
Detection limit at standardized
conditions:
25 °C gas temperature, 1000 hPa
pressure, 1 m path length and
constant ambient conditions.
O2: 200 ppm
CO: 0.6 ppm
Minimum measuring range
(at an effective optical path length of
1 m)
O2: 0 ... 1 vol. %
CO: 0 ... 100 ppmv
Maximum measuring range
(measuring range * path length)
O2: 0 ... 150 vol. % • m
CO: 0 ... 2 000 ppmv • m
Calibration verification interval
1 year
SITRANS SL
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181
Technical data
11.1 Technical data
Design, enclosure
Design, enclosure
Degree of protection
IP65 in accordance with EN 60529
Dimensions
For each unit (transmitter, receiver)
 Diameter: 165 mm
 Length 357 mm
Purging tube



Length: 340 mm
Outer diameter: ∅ 48 mm
Inner diameter: ∅ 44 mm
Weight



Receiver unit 6.0 kg
Transmitter unit 5.2 kg
Process interface
– For DN50/PN 10-40 5.3 kg
– For ANSI4"/150 lbs. approx. 12 kg
Connection dimension
customer flange
DN 50/PN 10-40 or ANSI 4"/150 lbs
Electric characteristics
Power supply
24 V DC nominal (18 ... 30.2 V DC)
Maximum power consumption
10 VA
EMC immunity
In accordance with EN 61326-1
Electric safety
In accordance with EN 61010-1
External fuse specifications
T1.6L250V
Dynamic performance
182
Start of measurement: < 5 min.
Full gas measurement accuracy: < 60 min.
Warm-up time at 20 °C/68 °F
ambient temperature


Response time (T90)
Approx. 2 s, depending on application
Integration time
0 ... 100 s, selectable
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Technical data
11.1 Technical data
Influencing variables
Influencing variables
Variations in ambient temperature
< 0.5 % of measuring range/10 K
Process gas temperature
With compensation: < 1 % of measuring range /100 K
Variations in ambient pressure
Negligible
Process gas pressure
With compensation: < 0.25 % of measured value/1000 hPa
Variations in supply voltage
Negligible
Electric inputs and outputs
Number of measurement channels
1
Analog outputs
2 outputs, 4 ... 20 mA DC, floating, ohmic resistance
max. 660 Ω.
Note
External isolating power supplies may have to be provided by
the customer or have to be ordered.
Analog inputs
2 inputs, designed for 4 ... 20 mA, 120 Ω
Digital outputs
2 outputs, with normally open contacts, configurable,
24 V/0.5 A, floating, single pole single throw (SPST)
Digital input
1 input, designed for 24 V, floating, configurable
Service port
Ethernet 10BaseT (RJ-45)
RS 485- PROFIBUS-DPV0
Two-wire interface, up to 3 Mbit/s, -7 ... + 12 V
RS 485-Modbus
Two-wire interface, up to 115 200 bit/s, -7 ... + 12 V
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Technical data
11.1 Technical data
Connection cable to customer interface
Configuration of connection cable
ATEX configuration: Use only cables
supplied
10 x 2, with shielding in twisted-pair configuration (depending
on type and number of I/Os used)
PROFIBUS DP connection cable
ATEX configuration: Use only cables
supplied
1 x 2 + 4 (PROFIBUS DP hybrid cable)
Modbus connection cable
ATEX configuration: Use only cables
supplied
1 x 2 + 3, with shielding in twisted-pair configuration
Cable length for ATEX configuration
3m
Conductor cross-section
Min. 0.34 mm2
Cable diameter
8 ... 12 mm or 13 ... 18 mm
Minimum bending radius
ATEX - PROFIBUS
110 mm
Sensor connection cable (included for ATEX)
Sensor connection cable type
4 x 2, with shielding, in twisted-pair configuration
Conductor cross-section
Min. 0.34 mm2
Cable sheath
PUR (polyurethane)
Dimensions


Minimum bending radius
ATEX: 85 mm
Diameter 11 mm
Length: up to 25 m
Climatic conditions

-20 ... +55 °C (-4 ... 131 °F) during operation (additional
solar radiation not permissible!)
-40 ... + 70 °C (-40 ... 158 °F) during transport and storage
Temperature range at the sensor
side of the process interface
(connection plate)

-20 ... +70 °C (-4 ... 158 °F)
Ambient pressure
800 ... 1 100 hPa (for ATEX and FM versions)
Humidity
< 100 % relative humidity (non condensing)
Ambient temperature range
184

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Operating Instructions, 12/2010, A5E01132948-04
Technical data
11.1 Technical data
Measuring conditions
Measuring conditions
Measurement path
0.3 ... 8 m (other lengths: please contact Siemens AG)
Process gas pressure, temperature




Dust load
O2: 900 ... 1 100 hPa (absolute), 0 ... 600 °C
(32 ... 1 111 °F) - applies to MLFB code AB
O2: 700 ... 5 000 hPa (absolute), 0 ... 200 °C
(32 ... 392 °F) - applies to MLFB code AC
CO: 700 ... 2 000 hPa (absolute), -20 ... 300 °C
(56 ... 392 °F) ) - applies to MLFB code JC
CO: 800 ... 1 200 hPa (absolute), -20 ... 700 °C
(56 ... 1 111 °F) ) - applies to MLFB code JC
The influence of a high dust load is complex, and depends on
the optical path length and particle size distribution.
Purging
Purging
Purging gas
O2 applications: nitrogen
CO applications: nitrogen, instrument air
● Quality
O2 applications: Purity better than 99.7 % in order to
achieve full performance. For oxygen measurements, an
oxygen content < 0.01 vol % in the purging gas is
recommended.
Instrument air: dry and oil-free
● Dew point
< -10 °C (14 °F), condensation on the optics must be avoided
Sensor purging
 Max. overpressure in the sensor
 Purging gas temperature on
sensor side
500 hPa
Flow
Purging on process side (optional)
 Pressure at purging gas inlet
 Flow
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
0 ... +55 °C (32 ... 131 °F)
O2 application: After commissioning of a sensor enclosure
previously filled with air: 3 ... 5 l/min (for at least 15 minutes),
thereafter: min. 0.25 l/minute
2 000 ... 8 000 hPa
Depending on process gas pressure, process gas speed, dust
load, humidity etc.
up to 50 l/minute
185
Technical data
11.1 Technical data
Safety
Electric safety
In accordance with IEC 61010 / DIN VDE 0411
Protection against explosion
ATEX II 2 G Ex de op is IIC T6
ATEX II 2 D Ex tD A21 IP 65 T85 °C
FM:
- Explosionproof for Class I, Division 1, Groups A, B, C and D,
Temperature Class T6 Ta=55 °C;
- Flameproof for Class I, Zone 1, AEx d IIC,
Temperature Class T6 Ta=55 °C;
- Dust-ignitionproof for Class II/III, Division 1, Groups E, F and G,
Temperature Class T6 Ta=55 °C;
- Dust-tight for Zone 21, AEx tD T85 °C Ta=55 C;
indoors and outdoors (Type 4X/IP65)
The information provided in this chapter contains descriptions or characteristics of
performance which in case of actual use may not apply as described as a result of further
development of the product. Technical specifications are subject to change without further
notice.
186
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Dimension drawings
12
Dimension drawings
12.1
Dimensional drawings
SITRANS SL can be delivered with two different process flanges - suitable for flange
connections DIN (DN50/PN10-40) or ANSI (ANSI 4"/150lb).
ರ
ºರ
r
ರ
①
②
③
④
⑤
⑥
⑦
',1ರ
$16,ರ
Purging tube
Process interface
Process purging input
Receiver cable kit or transmitter cable junction box
Mounting bracket for Receiver cable kit or transmitter cable junction box
Sensor purging input
Process flange
Figure 12-1
Dimensional drawing SITRANS SL (receiver and transmitter), all measures in mm (inches)
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
187
Dimension drawings
12.1 Dimensional drawings
ºರ
Figure 12-2
ºರ
[ºDSSUR[ರ
IRU0EROW
Dimensional drawing customer flange DN50/PN10-40, all measures in mm (inches)
Figure 12-3
188
ºº
ºº
ºº
[º
IRUEROW
Dimensional drawing customer flange ANSI 4"/150 lb, all measures in mm (inches)
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
77 (30 1/4”)
54 (21 1/4”)
59.2 (23 1/4”)
Dimension drawings
12.1 Dimensional drawings
355.5 (140”)
375 (147 5/8”)
Figure 12-4
Dimensional drawing calibration tube, all measures in mm (inches)
ಯ
ಯ
ಯ
ಯ
①
ಯ
ಯ
ಯ
Cable gland for sensor connection cable, M20 with plug
Figure 12-5
Dimensional drawing transmitter junction box, all measures in mm (inches)
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
189
ಯ
ಯ
Dimension drawings
12.1 Dimensional drawings
ಯ
ಯ
ಯ
ಯ
ಯ
ಯ
ಯ
ಯ
ಯ
ಯ
ಯ
ಯ
①
②
Cable gland for sensor connection cable, M20 with plug
Cable gland for Ethernet cable, M16 with plug
Figure 12-6
190
Dimensional drawing receiver junction box, all measures in mm (inches)
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
13
Spare parts and accessories
13.1
Spare parts
Table 13- 1
General spare parts
Spare parts
Order No.
Process interface ANSI 4"/150 lbs with gasket
A5E01009883
Process interface for DN 50/PN 10-40 with gasket
A5E01009881
Purging tube 340 mm (13 3/8") with 1 gasket
A5E01009892
Window lid
A5E01009897
Lid machined unit
A5E02568437
Connection cable analog and Modbus for ATEX
A5E02608597
Connection cable PROFIBUS DP for ATEX
A5E02608594
Transmitter junction box cable kit
A5E02568463
Receiver junction box cable kit
A5E02568465
Clamp ring
A5E01010033
Remote control IS, CSA, FM, ATEX
A5E02091214
Junction box Ex e 7 cores
A5E02091532
Capillary kit
A5E02183375
Gasket DN50 PN16
A5E02522036
Gasket ANSI 4"/150 lbs.
A5E02789535
Needle valve kit
A5E02569944
Sensor connection cable 5 m
A5E02571180
Sensor connection cable 10 m
A5E02571184
Sensor connection cable 25 m
A5E02571186
Cable gland kit non Ex
A5E02568457
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
191
Spare parts and accessories
13.1 Spare parts
Application-specific spare parts
NOTICE
The application-specific spare parts can be ordered by customers.
The receiver and transmitter modules may only be replaced by certified personnel.
Table 13- 2
192
Application-specific spare parts
Spare parts for O2 measurement
Order No.
Transmitter module O2
A5E01273790
Receiver module O2
A5E01273791
Transmitter module O2 ATEX
A5E02183403
Receiver module O2 ATEX
A5E02183422
Transmitter module O2 FM
A5E03000146
Receiver module O2 FM
A5E03000236
Spare parts for CO measurement
Order No.
Transmitter module CO
A5E03000243
Receiver module CO
A5E03000250
Transmitter module COATEX
A5E03000246
Receiver module COATEX
A5E03000251
Transmitter module CO FM
A5E03000247
Receiver module CO FM
A5E03000253
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Spare parts and accessories
13.2 Accessories
13.2
Accessories
SITRANS SL sensor alignment kit
The SITRANS SL sensor alignment kit includes a battery-operated lamp, a centering aid with
crosshair, and two hook spanners for opening the optics tube of the sensors.
WARNING
The SITRANS SL sensor alignment kit is not Ex protected. Therefore it must never be used
in a hazardous area without approval by the plant manager!
Verification kit
The SITRANS SL has already been factory-calibrated. If it is necessary to check the
calibration, this can be performed using an external verification kit following removal of the
transmitter and receiver units. This procedure has no influence on the adjustment of the unit.
The verification kit consists of a verification module and a thermometer. To carry out the
calibration verification, the verification module shall be mounted between the transmitter and
receiver.
①
②
③
Transmitter
Calibration tube as verification module
④
⑤
Receiver
Needle valve
Thermometer
Figure 13-1
Calibration setup of SITRANS SL for oxygen applications
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
193
Spare parts and accessories
13.2 Accessories
Sensor connection cable kit
The sensor connection cable kits consist of:
● a sensor connection cable of specified length (4 x 2, twisted pair)
● a mounting bracket for a junction box
● a receiver junction box
● a receiver junction box cable of 1 m length
Connection cable kit analog, Modbus
The connection cable kits consist of:
● a cable of 3 m length (10 x 2, twisted pair)
● a cable gland 1/2 NPT
● an adaptor 1/2 NPT to 3/4 NPT
Connection cable kit PROFIBUS DP
The connection cable kits consist of:
● a certified PROFIBUS DP hybrid cable of 3 m length (1 x 2 + 4 x 1)
● a cable gland 1/2 NPT
List of accessories
Accessories
Order No.
SITRANS SL alignment kit
A5E01000740
Junction box Ex e for 25 cores
A5E01267567
UV protective hose for outdoor use, ND = 48 mm, per 30 m
A5E01714061
Sensor connection cable kit 5 m, accessory
A5E02509347
Sensor connection cable kit 10 m, accessory
A5E02528048
Sensor connection cable kit 25 m, accessory
A5E02528052
Connection cable kit analog, Modbus
A5E03328474
Connection cable kit PROFIBUS DP
A5E03328473
Verification kit O2
A5E01000694
Verification kit CO
A5E03090938002
The use of these accessories is described in one of the following sections:
Alignment of SITRANS SL (Page 57) , Instrument verification (Page 149) , Connecting
cables (Page 52)
194
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
A
Appendix
A.1
Gas flow calculations
Gas flow calculations are slightly complex because gases are compressible fluids whose
density changes with pressure. In this application we are dealing with choked flow. The
outlet pressure is less than one half of the inlet pressure and the gas reaches sonic velocity
in the valve. A further decrease in outlet pressure does not increase the flow.
The flow (q) of instrument air at P1 = 6000 hPa and T1 = 25 °C (77°F) through the needle
valve when it is fully opened would then be a little more than 110 Nltr/min.
The figure below shows the flow (q) as a function of the up-stream pressure (P1). There are
two parameters in the diagram, the process pressure (Pp) and the temperature of the purge
gas which is assumed to be air. The diagram shows the flow through a system with a total Cv
of 0.1. The flow increases linearly with Cv.
q = the flow rate on the low pressure side [Nl/min.]
Cv= the flow coefficient (0.1 for the needle valve in our standard sensor)
P1 = the inlet absolute pressure [hPa]
Gg = the gas specific gravity (air = 1.0)
T1 = the upstream temperature [°C]
Pp = process pressure [hPa]
q (Cv = 0.1) [Nltr/min]
140
T1 = 25 °C
120
100
80
T1 = 100 °C
60
Pp = 2026 hPa
40
Pp = 1013 hPa
Pp = 3039 hPa
20
0
0
Figure A-1
1
2
3
4
5
6
P1 [x1013 hPa]
7
Purge air flow rate
Note
This figure represents a general context between pressure and flow rate.
The maximum purge flow rate of the SITRANS SL on process side is limited to 50 Nl/min.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
195
Appendix
A.2 ESD (ElectroStatic Discharge)
A.2
ESD (ElectroStatic Discharge)
ESD is the rapid, spontaneous transfer of electrostatic charge induced by a high electrostatic
field. Electrostatic damage to electronic devices can occur at any point from manufacture to
field service. Damage results from handling the devices in uncontrolled surroundings or
when poor ESD control practices are used. Generally damage is classified as either a
catastrophic failure or a latent defect.
Note
Usually, the charge flows through a spark between two objects at different electrostatic
potentials as they approach one another.
The symbol to the left indicates an ESD protected area, where all workspaces are ESD
protected and all personnel must wear wrist straps. This symbol will be used in this chapter
to indicate that a service task requires ESD protection.
A catastrophic failure means that exposure to an ESD event has caused an electronic device
to stop functioning. Such failures usually can be detected when the device is tested before
shipment.
A latent defect, on the other hand, is more difficult to identify. It means that the device has
only been partially degraded from exposure to an ESD event. Latent defects are extremely
difficult to prove or detect using current technology, especially after the device is assembled
into a finished product.
196
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Appendix
A.2 ESD (ElectroStatic Discharge)
Electrostatic charging
Anyone who is not connected to the electric potential of their surroundings can be
electrostatically charged.
The following figure shows the maximum electrostatic voltage which may build up on a
person coming into contact with the materials indicated. These values correspond to
IEC 801-2 specifications.
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Electrostatic voltages that can be charged to an operator
It is of utmost importance that ESD protective procedures are used during service in the
field. The components used in the laser analyzer have all been protected from ESD through
the whole production chain.
Ground Everything
Effective ESD grounds are of critical importance in any operation, and ESD grounding
should be clearly defined and regularly evaluated. According to the ESD Association
Standard ANSI EOS/ESD all conductors in the environment, including personnel, must be
bonded or electrically connected and attached to a known ground, bringing all ESD
protective materials and personnel to the same electric potential. This potential can be above
a "zero" voltage ground reference as long as all items in the system are at the same
potential. It is important to note that non-conductors in an Electrostatic Protected Area (EPA)
cannot lose their electrostatic charge by attachment to ground.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
197
Appendix
A.3 Verification Sheets
Wrist Straps
In many facilities, people are one of the prime generators of static electricity. Therefore, wrist
straps must be used while carrying out maintenance and service on the laser analyzer, to
keep the person wearing it connected to ground potential. A wrist strap consists of the cuff
that goes around the person's wrist and the ground cord that connects the cuff to the
common point ground.
Work Surface
An ESD protective work surface is defined as the work area of a single individual,
constructed and equipped to limit damage to ESD sensitive items. The work surface helps to
define a specific work area in which ESD sensitive devices may be safely handled. The work
surface is connected to the common point ground by a resistance to ground of 106 Ω to 109
Ω. This is done by using a soft bench mat, which is connected to ground, on the work
surface. All equipment must be connected to grounded outlets and all personnel must wear
wrist straps connected to the bench mat using a cord.
A.3
Verification Sheets
Instrument Verification
Albeit the SITRANS SL provides a high long-term stability due to the built-in, maintenancefree reference gas cell, a verification should be carried out at regular intervals. Details of that
procedure are described in section 9.1. (Page 149)
This procedure should be documented using the appropriate verification sheet provided later
in this section. It can be separated from manual using a knife or a pair of scissors.
198
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Appendix
A.3 Verification Sheets
SITRANS SL O2
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Figure A-3
Verification Sheet SITRANS SL O2
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
199
Appendix
A.3 Verification Sheets
SITRANS SL CO
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200
Verification sheet CO
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Appendix
A.4 Service and support
A.4
Service and support
Worldwide contact partners
If you have any further questions relating to the products described in this documentation,
contact your local representative at the Siemens office nearest you.
You will find information on whom to contact at our contact partners website
(http://www.siemens.com/automation/partner).
Product information on the Internet
The instructions are included on the CDs which are already supplied or may be ordered. In
addition, the instructions are available on the Internet on the Siemens homepage.
A signpost to the range of technical documentation, the online catalog, and the online
ordering system for individual SIMATIC products and systems is available at our homepage
(http://www.siemens.com/processanalytics)
Here you will find:
● Products & solutions, including our newsletter containing up-to-date information on your
products.
● Electronic trading over the Internet.
● Support with e.g. certificates, brochures and catalogs.
Training center
Siemens offers corresponding courses for newcomers to laser spectroscopy. Please contact
the central Training Center in Karlsruhe.
Training Center Europe
Process Instrumentation and Analytics
Siemensallee 84
D-76181 Karlsruhe, Germany
Internet (http://www.sitrain.siemens.com)
Technical support
● You can reach the "Technical Support" for all SC products using:
– the Web form for "Support Request" at (http://www.siemens.com/automation/supportrequest) .
– Phone: +49 (0)180 5050 222
(€ 0.14 /min. from the German landline network, max. € 0.42 /min. from German
mobile communication networks)
– Fax: +49 (0)180 5050 223
(€ 0.14 /min. from the German landline network, deviating mobile communications
prices are possible)
● You can find the latest information concerning your device on the Internet at our website
(http://www.automation.siemens.com).
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
201
Appendix
A.5 Returned deliveries
A.5
Returned deliveries
The analyzer or spare parts should be returned in the original packing material. If the original
packing material is no longer available, wrap the analyzer in plastic foil and pack in a
sufficiently large box lined with padding material (wood shavings or similar). When using
wood shavings, the stuffing should be at least 15 cm thick on all sides.
When shipping overseas, the analyzer must be additionally sealed air-tight in polyethylene
foil at least 0.2 mm thick with addition of a drying agent (e.g. silica gel). In addition, the
transport container should be lined with a layer of union paper.
Please photocopy the Returned deliveries form and the Decontamination declaration, fill in,
and enclose with the returned device.
In case of guarantee claim, please enclose your guarantee card.
Addresses for Returned Deliveries
Spare parts service
Please send your orders for spare parts to the following address:
SIEMENS SPA
CSC
Tel.: (00333)88906677
Fax: (00333)88906688
1, chemin de la Sandlach
F-67506 Haguenau
- DP order form receiver: 0011E
Repairs
To enable fast detection and elimination of faults, please return the analyzers to the following
address - until further notice:
SIEMENS SPA
CSC
Tel.: (00333)88906677
Fax: (00333)88906688
1, chemin de la Sandlach
F-67506 Haguenau
- DP order form receiver: 0011E
202
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Appendix
A.5 Returned deliveries
A.5.1
Returned deliveries form
5HWXUQHGGHOLYHULHVIRUP
5HSDLU*XDUDQWHH
Name of customer
Person responsible
Delivery address
Phone
Fax
Email
Address for returned delivery
(if different from above)
Customer (original) order no.
Device name
Order (MLFB) no.
Serial no.
Designation of returned part
Fault description
Process data at point of
measurement
Operating temperature
Operating pressure
Composition of sample gas
Duration of use/
date of commissioning
Process data at point of
measurement
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
203
Appendix
A.5 Returned deliveries
A.5.2
Decontamination declaration
To protect our employees, equipment and environment, it must be guaranteed that the
returned device is free of all residues of the measured media.
For this reason we check if a complete decontamination declaration is present before
unpacking the device.
Please securely apply a clear plastic envelope with the completely filled-in and signed
decontamination declaration including the shipping papers outside on the packaging.
Name of customer
Person responsible
Delivery address
Phone
Fax
Email
Address for returned delivery
(if different from above)
Device name
Order (MLFB) no.
Serial no.
Designation of returned part
Medium
Concentration
Cleaning medium
Duration of use/
date of commissioning
Confirmation
It is herewith confirmed that all residues of the measured
medium have been removed. The device is free of all
dangerous and/or toxic materials.
Location / date /
signature
204
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
B
List of abbreviations
Abbreviation / symbol
Explanation
″
Inch - 1″ ≙ 25.4 mm
<
Less than
>
Greater than
≤
Less than or equal to
≥
Greater than or equal to
°
Degrees
°C
Degrees celsius - 1°C ≙ 1.8 °F
°F
Degrees fahrenheit - 1°F ≙ 0.555... °C
AC
Alternating Current
ANSI
American National Standards Institute
API
Application Interface
ATEX
Explosive atmospheres (French:Atmosphères Explosibles)
Bit
Binary digit
CP
Communication Processor
CPU
Central Processing Unit
CSA
Canadian Standards Association
DC
Direct Current
DN
Diameter nominal
DP
Distributed Peripheral I/O
e.g.
For example
EEPROM
Electrically Erasable Programmable Read Only Memory
EMC
Electromagnetic compatibility
ESD
Electrostatic Discharge
EU
European Union
Ex
Explosive atmosphere
FM
Factory Mutual, certifying body in the USA for hazardous area
approvals
FPGA
Field programmable gate array
FTP
Foiled twisted pair
GSD
Device master data file (German: Geräte-Stamm-Datei)
HU
Height unit for computer housings, 1 HU ≙ 1¾" ≙ 44.45 mm
K
Kelvin
kHz
Kilohertz
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
205
List of abbreviations
206
Abbreviation / symbol
Explanation
l/min
Liters per minute
LAN
Local Area Network
LCD
Liquid crystal display
LD
Laser diode
LDS
Laser Diode Spectrometer
LDSComm
Laser Diode Spectrometer Communication software
LED
Light emitting diode
LUI
Local User Interface
max.
Maximum
mm
Millimeter
mm²
Square millimeters
MPa
Megapascal
MPI
Message passing Interface
MSB
Most significant byte
n. B.
As required
NAMUR
Standards working committee for measuring and control
technology in the chemical industry.
NC
Not connected
O2
Oxygen
PA
Process Automation
PC
Personal Computer
PCB
Printed Circuit Board
PCMCIA
Personal Computer Memory Card International Association
PCS
Process Control System
PDM
Process Device Manager
PE
Protective Earth (terminal)
PG
Programming device
PI
Process Interface
PLC
Programmable Logic Controller
PN
Pressure nominal
PROFIBUS
Process Field Bus
QAL
Quality Assurance Level
RAM
Random Access Memory
RHU
Receiver Housing Unit
RTU
Receiver Tube Unit
Rx
Receive (Rx) identifies a receiver
s
Second
SELV
Safety Extra Low Voltage
SM374
Simulation module 374
SMA
Sub-Miniature A, a coaxial connector type
STP
Screened twisted pair
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List of abbreviations
Abbreviation / symbol
Explanation
TCP/IP
Transmission Control Protocol/Internet Protocol; a reference model
for communication on the Internet
THU
Transmitter Housing Unit
TTU
Transmitter Tube Unit
Tx
Transmit (Tx) identifies a transmitter
UL
Underwriters Laboratories, a US certifying body
V
Volt
Vol%
Volume percent
vpm
Volume parts per million
Δ
Difference (Greek: delta)
μC
Microcontroller
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List of abbreviations
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Glossary
Analog
Continuous representation of a variable, e.g. voltage, using a scale, in contrast to "Digital".
ATEX
ATEX stands for both the directives of the European Community for the field of explosion
protection: the ATEX product directive 94/9/EC and the ATEX operation directive
1999/92/EC.
Automation system
An automation system is a programmable logic controller consisting of at a central
processing unit, a variety of input and output modules as well as operator control and
monitoring (HMI) devices.
Bus
A cable or conductor system used for data transfer among the components of a computer
system. Buses are characterized by the number of bits they can transfer at any one time.
There are serial bus systems (one bit after the other) and parallel bus systems (multiple bits
simultaneously over several lines).
CSA
The Canadian Standards Association sets standards for North America. The CSA also
certifies products used in hazardous areas.
Digital
Representation of a variable, e.g. time, in the form of characters or numbers. In its digital
representation, this variable can be changed only in pre-defined steps, in contrast to
"Analog".
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Glossary
Div. 0
Area in which dangerous, potentially explosive gaseous atmospheres can form frequently,
constantly or over long time periods during the normal operation of a device. Div 0 (US
standard) corresponds to Zone 0 (European standard).
Div. 1
Area in which dangerous, potentially explosive gaseous atmospheres are permanently
present during the normal operation of a device. Div 1 (US standard) corresponds to Zone 0
and Zone 1 (European standard).
Div. 2
Area in which normally less dangerous, potentially explosive gaseous atmospheres form
during the normal operation of a device. Div 2 (US standard) corresponds to Zone 2
(European standard).
EEPROM
Electrically Erasable Programmable Read Only Memory
EEPROMs are often used where individual bytes of data (e.g. configuration data or runtime
meters) change over time and must be stored safely in the event of a mains power failure.
Electro Magnetic Compatibility
Definition as per the EMC law:
EMC is the capability of a device to operate satisfactorily in an electromagnetic environment
without itself emitting electromagnetic signals which interfere with other devices in that
environment.
Endian
Date is sometimes saved in a different order in certain computer architectures. Intel-based
computers, for example, save the data differently from the Siemens controllers (S7), namely,
in reverse sequence. The byte sequence from Intel, termed Little Endian, is therefore the
reverse S7 byte sequence, Big Endian. The following applies to these two forms:
● Little Endian: The most significant byte is located at the right-hand end of a word.
● Big Endian: The most significant byte is located at the left-hand end of a word.
Ethernet
This is a specific type of local network that works according to a standard defined by Intel,
DEC and Xerox.
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Glossary
FBD
A Function Block Diagram is a graphic representation of control functions. Each control task
(function) has a corresponding symbol.
FM, Factory Mutual
FM Global is a U.S.-based insurance company, with offices worldwide, that specializes in
loss prevention services primarily to large corporations throughout the world in the Highly
Protected Risk (HPR) property insurance market sector. "FM Global" is the communicative
name of the company, whereas the legal name is "Factory Mutual Insurance Company". The
company offers general and specialized risk management, materials research and testing
and certifications in the fire security and explosion protection fields.
Interface, multi-point
MPI is the programming interface of SIMATIC S7/M7. Allows remote access to
programmable modules, text-based displays and OPs from central locations. The MPI nodes
can intercommunicate.
LAD
Ladder Diagram -> Graphic representation of controller functions based on a circuit diagram
from protection technology. The current paths, however, are not arranged horizontally in
relation to one another and the symbols deviate.
Modbus
The Modbus protocol is a communications protocol based on a master/slave or client/server
architecture. The Modbus protocol was defined by Modicon in 1979 for communication with
its programmable controllers. Modbus is a de facto standard in industry, since it is an open
protocol.
Modbus is used to connect a master (e.g. a PC) and several slaves (e.g. measuring and
control systems). There are two versions of Modbus: one for the serial interface and one for
Ethernet.
MSB
MSB is the byte (or octet) in that position of a multi-byte number which has the greatest
potential value.
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Glossary
PC card
Trademark of the Personal Computer Memory Card International Association (PCMCIA).
Designation for auxiliary cards that conform with PCMCIA specifications. A PC card that has
roughly the size of a credit card can be plugged into a PCMCIA slot. Version 1 specifies
cards of Type I with a thickness of 3.3 millimeters, which are designed mainly for use as
external memory. Version 2 of the PCMCIA specification also defines cards of Type II with a
thickness of 5 mm and cards of Type III with a thickness of 10.5 mm. Type II cards can
realize devices such as modems, fax cards and network interface cards. Type III cards are
equipped with devices that require more space, for example wireless communication
modules, or rotary storage media such as hard disk drives, for example.
PCMCIA
Association consisting of approx. 450 member companies of the computer industry whose
focus is set on providing worldwide standards for miniaturization and flexible use of PC
expansion cards in order to provide basic technologies to the market.
PROFIBUS
Process Field Bus-> International fieldbus standard to EN 50170/IEC 61158
PROFIBUS DP
PROFIBUS-DP (distributed peripheral I/O) is used for controlling sensors and actuators
using a central controller in production engineering. It is also used in connection with
"distributed intelligence", i.e. connecting multiple controllers to form a network. It provides
data transmission up to 12 Mbps on twisted-pair cables and data transmission over sliding
contacts for mobile subscribers in exceptional cases or optical data transmission in
unobstructed space.
PROFIBUS/MPI
Process Field Bus (standard bus system for process applications)
RS 232
A recognized industrial standard for serial data transmission, and applies to cable lengths up
to 15 m. Differential evaluation is not possible with RS 232. The sending and receiving of
data take place on different lines.
RS 485
RS 485 is an interface standard for line-based, differential, serial data transmission. RS 485
uses a pair of cables in order to transmit one inverted version and one non-inverted version
of the data signal. The original data signal is reconstructed at the receiver from the difference
between these two signals. It is then possible to use significantly longer transmission links
and higher speeds than with RS 232. Furthermore, several transmitters and several
receivers can be connected to one pair of conductors.
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Glossary
STEP 7
STEP 7 is programming software for the S7-300 and S7-400 controller families
STL
Statement list -> User program in which control functions are listed in the form of statements.
Termination
The termination (lat. terminare for "end") used in telecommunications technology describes
the completion of a signal path. The termination results in minimization of signal reflections
which could otherwise lead to interferences. The termination is normally used at the physical
end of a signal path.
Zone 0
Area in which dangerous, potentially explosive gaseous atmospheres can form frequently,
constantly or over long time periods during the normal operation of a device.
Zone 1
Area in which a dangerous, potentially explosive gaseous atmosphere occasionally forms
during the normal operation of a device.
Zone 2
Area in which a dangerous, potentially explosive gaseous atmosphere usually doesn't form,
or only for a short time period, during the normal operation of a device.
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Glossary
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