ABB 266 MODBUS User manual

2105216 Rev. AB
The most accurate
multivariable transmitter
ABB has ever produced
User manual
2600T series pressure transmitters
266 MODBUS®multivariable transmitter

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Contents
Typographical conventions................................................................................................................................vii
Additional publications......................................................................................................................................viii
1Health and safety...........................................................................................................................................1
General information and notes.................................................................................................................................1
Safety, warning, and note symbols ..........................................................................................................................1
Compliance.............................................................................................................................................................2
2System description........................................................................................................................................3
Introduction.............................................................................................................................................................3
Theory of operation.................................................................................................................................................3
Transmitter accuracy and traceability standards.......................................................................................................4
Transmitter dimensions...........................................................................................................................................4
Transmitter hardware subassemblies.......................................................................................................................6
Transmitter operational specifications......................................................................................................................7
Power requirements................................................................................................................................................8
Input/output specifications.......................................................................................................................................9
User interface.......................................................................................................................................................14
3Installation...................................................................................................................................................16
Site planning and preparation................................................................................................................................16
Unpacking, inspection, and verification ..................................................................................................................17
Mounting options...................................................................................................................................................19
Housing and display orientation.............................................................................................................................23
RTD installation ....................................................................................................................................................25
Electrical connections............................................................................................................................................28
4Transmitter start up.....................................................................................................................................33
Supplying power ...................................................................................................................................................33
Configuring the transmitter ....................................................................................................................................34
Commissioning the transmitter...............................................................................................................................37

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Software configuration security..............................................................................................................................43
5Service and maintenance............................................................................................................................44
Replacement parts................................................................................................................................................44
Transmitter hardware security................................................................................................................................45
Transmitter write protection ...................................................................................................................................46
Replacing the LCD assembly.................................................................................................................................48
Replacing the HMI connector.................................................................................................................................49
Replacing the electronics module ..........................................................................................................................50
Replacing the terminal block..................................................................................................................................54
Adjusting the LCD screen contrast.........................................................................................................................56
Replacing the RTD probe......................................................................................................................................57
RTD wiring verification...........................................................................................................................................58
Removing the transmitter from service...................................................................................................................58
Calibrating ............................................................................................................................................................59
Setting the measurement bias ...............................................................................................................................65
Resetting the transmitter to factory defaults............................................................................................................69
6Troubleshooting..........................................................................................................................................70
Diagnostic codes...................................................................................................................................................70
Blank display screen .............................................................................................................................................73
Communication failure...........................................................................................................................................76
Customer service and support...............................................................................................................................78
Appendix A HMI menu structure ...................................................................................................................79
Appendix B DIP switch settings....................................................................................................................84
B.1 DIP switch access.................................................................................................................................................84
B.2 Write protection.....................................................................................................................................................85

iv
B.3 DIP switch states ..................................................................................................................................................85
Appendix C MODBUS®register lists .............................................................................................................86
C.1 ABB transmitter register map.................................................................................................................................86
C.2 Rosemount 3095FB emulation register map...........................................................................................................92
C.3 Invensys IMV25 emulation register map.................................................................................................................94
Appendix D Additional mounting examples..................................................................................................95
D.1 Steam or clean liquids flow measurement..............................................................................................................95
D.2 Liquid level in a closed tank (dry leg) .....................................................................................................................96
D.3 Liquid level in a closed tank (wet leg).....................................................................................................................97
Appendix E Hazardous area ratings and considerations.............................................................................98
E.1 Ex Explosion protection aspects (Europe and International)....................................................................................98
E.2 Ex Explosion protection aspects (United States and Canada)...............................................................................101
Appendix F Approvals and certifications ...................................................................................................103
F.1 USA, Explosion-Proof..........................................................................................................................................103
F.2 USA, Non-Incendive............................................................................................................................................107
F.3 Canada, Explosion-Proof.....................................................................................................................................113
F.4 Canada, Non-Incendive.......................................................................................................................................117
F.5 IECEx, Flame-Proof............................................................................................................................................123
F.6 IECEx, Non Sparking ..........................................................................................................................................128
F.7 ATEX, Flame-Proof.............................................................................................................................................135
F.8 ATEX, Non Sparking...........................................................................................................................................140
Appendix G Glossary...................................................................................................................................146
Appendix H Index.........................................................................................................................................150

v
List of Figures
Figure 1: 266 Multivariable transmitter and RTD process inputs...............................................................................3
Figure 2: 266 Horizontal flange transmitter dimensions............................................................................................4
Figure 3: 266 Vertical flange transmitter dimensions................................................................................................5
Figure 4: 266 MODBUS®multivariable transmitter exploded view............................................................................6
Figure 5: Supply current chart.................................................................................................................................8
Figure 6: Power consumption chart.........................................................................................................................8
Figure 7: RS-485 MODBUS®communication signal lines ......................................................................................11
Figure 8: Sample MODBUS®message frame........................................................................................................13
Figure 9: Operation screen (Operator Page 1).......................................................................................................14
Figure 10: Local HMI display.................................................................................................................................14
Figure 11: HMI menu tree hierarchy......................................................................................................................15
Figure 12: Transmitter name plates.......................................................................................................................17
Figure 13: Horizontal flange assembly, direct mount (for illustrative purposes only) ...............................................19
Figure 14: Vertical flange assembly, direct mount (for illustrative purposes only)....................................................20
Figure 15: Pipe saddle assembly...........................................................................................................................21
Figure 16: Pipe mounting bracket assembly..........................................................................................................22
Figure 17: Horizontal flange assembly, pipe-mounted............................................................................................22
Figure 18: Transmitter housing rotation and stop-screw.........................................................................................23
Figure 19: Display rotation.....................................................................................................................................24
Figure 20: Explosion-proof RTD, disassembled.....................................................................................................25
Figure 21: RTD probe wiring to explosion-proof head wiring block.........................................................................26
Figure 22: RTD wiring to transmitter......................................................................................................................26
Figure 23: RTD probe ...........................................................................................................................................27
Figure 24: Ground connections .............................................................................................................................28
Figure 25: Housing covers and cable entry points..................................................................................................30
Figure 26: RTD Simulation wiring..........................................................................................................................31
Figure 27: Termination block showing RTD, communication, and electrical connections........................................32
Figure 28: Display operating properly....................................................................................................................33
Figure 29: HMI navigation.....................................................................................................................................34
Figure 30: Easy Setup menu.................................................................................................................................35
Figure 31: Connections required to validate communication in a non-hazardous area............................................37
Figure 32: MODBUS®Server state diagram ..........................................................................................................38
Figure 33: Connections and manifold valve operation (for illustrative purposes only) .............................................39
Figure 34: 266 MODBUS®multivariable transmitter replacement parts..................................................................44
Figure 35: Transmitter housing security screws.....................................................................................................45
Figure 36: DIP switches on the electronics module................................................................................................46
Figure 37: Transmitter disassembly.......................................................................................................................48
Figure 38: Software revision numbers ...................................................................................................................50
Figure 39: Electronics module...............................................................................................................................51
Figure 40: Ribbon cable........................................................................................................................................51
Figure 41: HMI connector......................................................................................................................................52
Figure 42: DIP switch 1.........................................................................................................................................52
Figure 43: Termination points................................................................................................................................54
Figure 44: Terminal block......................................................................................................................................55
Figure 45: Contrast setting....................................................................................................................................56
Figure 46: RTD replacement.................................................................................................................................57
Figure 47: Transmitter with a 3-valve manifold (for illustrative purposes only) ........................................................58

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Figure 48: Alarm condition indicated (Sensor) .......................................................................................................70
Figure 49: Operator menu, diagnostics screen ......................................................................................................70
Figure 50: Sensor alarm detail screen...................................................................................................................70
Figure 51: Transmitter power connections.............................................................................................................74
Figure 52: RS-485 communication wiring..............................................................................................................77
Figure 53: HMI display..........................................................................................................................................79
Figure 54: DIP switches ........................................................................................................................................84
Figure 55: Steam or clean liquid flow measurement (transmitter and manifold)......................................................95
Figure 56: Level measurement on a closed tank with dry leg.................................................................................96
Figure 57: Level measurement on a closed tank with wet leg.................................................................................97
Figure 58: Examples of gas and dust application zone separations........................................................................99
List of Tables
Table 1: Transmitter subassemblies........................................................................................................................6
Table 2: 266 Transmitter specifications ...................................................................................................................7
Table 3: Differential pressure specifications.............................................................................................................9
Table 4: Static pressure specifications.....................................................................................................................9
Table 5: RTD input specifications..........................................................................................................................10
Table 6: RTD element errors.................................................................................................................................10
Table 7: MODBUS® RTU message frame format...................................................................................................11
Table 8: Bit sequence in RTU mode (with parity checking) ....................................................................................13
Table 9: Bit sequence in RTU mode (with no parity) ..............................................................................................13
Table 10: Pre-installation checklist........................................................................................................................16
Table 11: Model number configuration...................................................................................................................18
Table 12: Communication parameters...................................................................................................................36
Table 13: Replacement parts list...........................................................................................................................44
Table 14: Calibration menu...................................................................................................................................59
Table 15: Device menu.........................................................................................................................................65
Table 16: Diagnostic code cause and action..........................................................................................................71
Table 17: Communication parameters...................................................................................................................76
Table 18: HMI menu structure...............................................................................................................................80
Table 19: DIP switch states...................................................................................................................................85
Table 20: ABB transmitter register map.................................................................................................................86
Table 21: Rosemont MODBUS®register map........................................................................................................92
Table 22: Temperature class definitions..............................................................................................................102

vii
Typographical conventions
The following conventions are used throughout this manual.
Element
Convention
Example
Cross-reference to a figure or table in the
document
Hyperlink the figure or table label and
number. If the figure or table is not
immediately following the cross-reference,
add the page number where it is located.
See Figure 2 or See Table 3 (page 12).
Cross-reference to a specific section in the
document
Hyperlink both the section number and title,
with the section title in italics
Go to section 2.1, Device setup.
Greater than character (>)
Indicates that the following item is an
additional menu selection.
Use the key pad to locate and select
Calibrate > Diff. Press. Sensor >
Calibration Units > Edit.
Menu item names in instructions
Bold text and the capitalization of names
agrees with the names as displayed on the
HMI menu.
Use the right soft key to enter the Main
Menu.
Programs, including utility and accessory
programs
Title capitalization
Microsoft Word
URL
All lowercase for a fully specified URL. If
necessary, break long URLs before a
forward slash or break a long URL before it
begins
http://www.microsoft.com/
seattle.sidewalk.com
User input
Lowercase, unless case sensitive. Bold or
italic, depending on element. If the user input
string contains placeholder text, use italics
for that text.
Type Name tag

viii
Additional publications
Additional free publications for the 266 MODBUS®multivariable transmitter are available for download from the ABB Library
Download Center:
266 MODBUS®multivariable startup guide
2105328
266 pressure transmitter short operating instruction manual
2105549
266JSH/JST MODBUS®multivariable transmitter data sheet
2101130
XSeries TFIO module user manual
2101226
XSeriesG4 flow computer user manual
2103335
XSeriesG4 remote controller user manual
2103334
TFIO Comm Interface Module (2100421) to transmitter MODBUS®w/ RTD user drawing
2102345
Transmitter pipe mount bracket user drawing
2104265
XFC G4 (Com2) ABB267/269 and ABB266 user drawing
2102118
XFC G4 (Com2) IMV25 and ABB266 user drawing
2105115
XFC G4 EX (Com2) ABB267/269 and ABB266 user drawing
2102117
XRC G3 (Com1) ABB267/269 and ABB266 user drawing
2105114
XRC G4 (Com2) ABB267/269 and ABB266 user drawing
2105113
XRC G4 (Com2) IMV25 and ABB266 user drawing
2105116

1 Health and safety
266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB | 1
1 Health and safety
General information and notes
Read these instructions carefully prior to installation and commissioning. For reasons of clarity, these instructions do not contain
all details about every type or version of the product, and therefore, do not take into account every conceivable assembly,
operating, or maintenance scenario. For further information, or if specific problems arise which are not addressed in the
instructions, please ask themanufacturer. The content of these instructions is neither part of, nor provided for changing a
previous or existing agreement, promise, or legal relationship. All obligations to ABB result from the respective sales contract,
which also contains the full and solely valid warranty clauses. These are neither limited to, nor extended by the content of these
instructions.
Observe warning signs on the packaging and on the device.
Safety, warning, and note symbols
DANGER –Serious damage to health / risk to life. This symbol, in conjunction with the signal word
"DANGER", indicates an imminent danger. Failure to observe this safety information will result in death or severe
injury. The text may state the hazard, how to avoid the hazard, and what the result would be if not followed.
DANGER –Serious damage to health / risk to life. This symbol, in conjunction with the signal word
"DANGER", indicates an imminent electrical hazard. Failure to observe this safety information will result in death
or severe injury. The text may state the hazard, how to avoid the hazard, and what the result would be if not
followed.
WARNING –Bodily injury. This symbol, in conjunction with the signal word "WARNING", indicates a potentially
dangerous situation. Failure to observe this safety informationmay result in severe injury. The text may state the
hazard, how to avoid the hazard, and what the result would be if not followed.
WARNING –Bodily injury. This symbol, in conjunction with the signal word "WARNING", indicates a potential
electrical hazard. Failure to observe this safety information may result in death or severe injury. The text may
state the hazard, how to avoid the hazard, and what the result would be if not followed.
CAUTION –Minor injuries. This symbol, in conjunction with the signal word "CAUTION", indicates a potentially
dangerous situation. Failure to observe this safety information may result in minor or moderate injury.
NOTICE –Property damage. This symbol indicates a potentially damaging situation. Failure to observe this
safety information may result in damage to or destruction of the product and other system components.
IMPORTANT NOTE: This symbol indicates operator tips, particularly useful information, or important information
about the product or its further uses. The signal words "IMPORTANT NOTE" does not indicate a dangerous or
harmful situation.

1 Health and safety
2 | 266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB
Only qualified and authorized specialists are to be employed for the assembly, electrical connection, commissioning, and
maintenance of the transmitter. Specific training and skills required include:
—Training, instruction, and authorization to operate and maintain devices or systems according to safety engineering
standards for electrical circuits, high pressures, and corrosive media
—Training or instruction in accordance with safety engineering standards regarding the maintenance and use of adequate
safety systems
WARNING –Bodily injury. For electrical connections, use sufficiently insulated tools, according to the EN 60900
standard.
Follow the applicable standards, regulations, and recommendations for installation, including:
—The construction and operation of electrical installations. For example, the regulation for technical working materials (safety
guidelines for tools)
—Explosion protection, if transmitters with explosion protection are installed
The device can be operated at high levels of pressure and with corrosive media. Serious injury and/or considerable material
damage can result if the transmitter is handled incorrectly. Ensure compliance with the regulations applicable in the country of
use when working with transmitters.
The material of the Sensor Diaphragm, Flanges, and Gaskets, (selected at the time the pressure transmitter order was placed)
must be compatible with the environment and process fluids that may be present at the installation location. The environment
and process fluids must not adversely affect the materials of the equipment construction.
The enclosure contains either aluminum or stainless steel which may be a risk of ignition of the potentially explosive atmosphere
(classified location) by impact or friction. Care must be taken into account during installation and maintenance to prevent impact
or friction.
Compliance
EU Directive 2012/19/EU - Waste Electrical and Electronic Equipment (WEEE)
ABB Industrial Automation, Measurement and Analytics, is committed to actively protecting the environment. Do not dispose of
WEEE as unsorted municipal waste. Collect WEEE separately. Participation in the management of WEEE is critical to the
success of WEEE collection.
Electrical and electronic equipment marked using the crossed-out wheeled bin symbol shall not be mixed with
general household waste. Correct disposal at a recycling facility will help save valuable resources and prevent
potential negative effects on health and the environment. These steps ensure compliance with the Waste
Electrical and Electronic Equipment (WEEE) Directive.
Waste electrical and electronic equipment (WEEE) shall be treated separately using the national collection framework available
to customers for the return, recycling, and treatment of WEEE.