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266 MODBUS
ABB 266 MODBUS User Manual
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2
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266 MODBUS
® multi
v
ari
able transm
i
tter Us
er manual
2105216
Rev.
AB
Power requiremen
t
s
The
supply v
oltage
requi
r
e
d range
is 10
.
5 to
30
Vdc
.
F
or cu
r
re
nt
draw
require
ments se
e Figure
5. F
or powe
r consu
m
p
ti
o
n base
d
on spe
cific sup
ply
volta
ge
s see
Figure 6
.
Figure
5: Supp
ly curre
nt
cha
rt
S
uppl
y
V
ol
tage
(Vdc
)
Po
wer
(
mW
)
Figure
6: Pow
er con
sumption
cha
rt
15
17
Table of Contents
Default Chapter
2
Table of Contents
2
Typographical Conventions
7
Additional Publications
8
1 Health and Safety
9
General Information and Notes
9
Safety, Warning, and Note Symbols
9
Compliance
10
2 System Description
11
Introduction
11
Theory of Operation
11
Figure 1: 266 Multivariable Transmitter and RTD Process Inputs
11
Transmitter Accuracy and Traceability Standards
12
Transmitter Dimensions
12
Figure 2: 266 Horizontal Flange Transmitter Dimensions
12
Figure 3: 266 Vertical Flange Transmitter Dimensions
13
Transmitter Hardware Subassemblies
14
Figure 4: 266 MODBUS ® Multivariable Transmitter Exploded View
14
Table 1: Transmitter Subassemblies
14
Transmitter Operational Specifications
15
Table 2: 266 Transmitter Specifications
15
Power Requirements
16
Figure 5: Supply Current Chart
16
Figure 6: Power Consumption Chart
16
Input/Output Specifications
17
Table 3: Differential Pressure Specifications
17
Table 4: Static Pressure Specifications
17
Table 5: RTD Input Specifications
18
Table 6: RTD Element Errors
18
Figure 7: RS-485 MODBUS
19
Communication Signal Lines
19
RTU Message Frame Format
19
Figure 8: Sample MODBUS
21
Message Frame
21
Table 8: Bit Sequence in RTU Mode (with Parity Checking)
21
Table 9: Bit Sequence in RTU Mode (with no Parity)
21
Figure 10: Local HMI Display
22
Figure 9: Operation Screen (Operator
22
User Interface
22
Figure 11: HMI Menu Tree Hierarchy
23
3 Installation
24
Site Planning and Preparation
24
Table 10: Pre-Installation Checklist
24
Unpacking, Inspection, and Verification
25
Figure 12: Transmitter Name Plates
25
Table 11: Model Number Configuration
26
Mounting Options
27
Figure 13: Horizontal Flange Assembly, Direct Mount (for Illustrative Purposes Only)
27
Figure 14: Vertical Flange Assembly, Direct Mount (for Illustrative Purposes Only)
28
Figure 15: Pipe Saddle Assembly
29
Figure 16: Pipe Mounting Bracket Assembly
30
Figure 17: Horizontal Flange Assembly, Pipe-Mounted
30
Housing and Display Orientation
31
Figure 18: Transmitter Housing Rotation and Stop-Screw
31
Figure 19: Display Rotation
32
RTD Installation
33
Figure 20: Explosion-Proof RTD, Disassembled
33
Figure 21: RTD Probe Wiring to Explosion-Proof Head Wiring Block
34
Figure 22: RTD Wiring to Transmitter
34
Figure 23: RTD Probe
35
Electrical Connections
36
Figure 24: Ground Connections
36
Figure 25: Housing Covers and Cable Entry Points
38
Figure 26: RTD Simulation Wiring
39
Figure 27: Termination Block Showing RTD, Communication, and Electrical Connections
40
4 Transmitter Start up
41
Supplying Power
41
Figure 28: Display Operating Properly
41
Configuring the Transmitter
42
Figure 29: HMI Navigation
42
Figure 30: Easy Setup Menu
43
Table 12: Communication Parameters
44
Commissioning the Transmitter
45
Figure 31: Connections Required to Validate Communication in a Non-Hazardous Area
45
Figure 32: MODBUS ® Server State Diagram
46
Figure 33: Connections and Manifold Valve Operation (for Illustrative Purposes Only)
47
Software Configuration Security
51
5 Service and Maintenance
52
Replacement Parts
52
Figure 34: 266 MODBUS
52
Multivariable Transmitter Replacement Parts
52
Table 13: Replacement Parts List
52
Figure 35: Transmitter Housing Security Screws
53
Transmitter Hardware Security
53
Figure 36: DIP Switches on the Electronics Module
54
Transmitter Write Protection
54
Figure 37: Transmitter Disassembly
56
Replacing the LCD Assembly
56
Replacing the HMI Connector
57
Figure 38: Software Revision Numbers
58
Replacing the Electronics Module
58
Figure 39: Electronics Module
59
Figure 40: Ribbon Cable
59
Figure 41: HMI Connector
60
Figure 42: DIP Switch 1
60
Figure 43: Termination Points
62
Replacing the Terminal Block
62
Figure 44: Terminal Block
63
Adjusting the LCD Screen Contrast
64
Figure 45: Contrast Setting
64
Figure 46: RTD Replacement
65
Replacing the RTD Probe
65
Figure 47: Transmitter with a 3-Valve Manifold (for Illustrative Purposes Only)
66
Removing the Transmitter from Service
66
RTD Wiring Verification
66
Calibrating
67
Table 14: Calibration Menu
67
Setting the Measurement Bias
73
Table 15: Device Menu
73
Resetting the Transmitter to Factory Defaults
77
6 Troubleshooting
78
Diagnostic Codes
78
Figure 48: Alarm Condition Indicated (Sensor)
78
Figure 49: Operator Menu, Diagnostics Screen
78
Figure 50: Sensor Alarm Detail Screen
78
Table 16: Diagnostic Code Cause and Action
79
Blank Display Screen
81
Figure 51: Transmitter Power Connections
82
Communication Failure
84
Table 17: Communication Parameters
84
Figure 52: RS-485 Communication Wiring
85
Customer Service and Support
86
Appendix Ahmi Menu Structure
87
Figure 53: HMI Display
87
Table 18: HMI Menu Structure
88
Appendix Bdip Switch Settings
92
DIP Switch Access
92
Figure 54: DIP Switches
92
Write Protection
93
DIP Switch States
93
Table 19: DIP Switch States
93
Appendix Cmodbus ® Register Lists
94
ABB Transmitter Register Map
94
Table 20: ABB Transmitter Register Map
94
Rosemount 3095FB Emulation Register Map
100
Table 21: Rosemont MODBUS Register Map
100
Invensys IMV25 Emulation Register Map
102
Appendix D Additional Mounting Examples
103
Steam or Clean Liquids Flow Measurement
103
Figure 55: Steam or Clean Liquid Flow Measurement (Transmitter and Manifold)
103
Liquid Level in a Closed Tank (Dry Leg)
104
Figure 56: Level Measurement on a Closed Tank with Dry Leg
104
Liquid Level in a Closed Tank (Wet Leg)
105
Figure 57: Level Measurement on a Closed Tank with Wet Leg
105
Appendix E Hazardous Area Ratings and Considerations
106
Ex Explosion Protection Aspects (Europe and International)
106
Figure 58: Examples of Gas and Dust Application Zone Separations
107
Ex Explosion Protection Aspects (United States and Canada)
109
Table 22: Temperature Class Definitions
110
Appendix F Approvals and Certifications
111
USA, Explosion-Proof
111
USA, Non-Incendive
115
Canada, Explosion-Proof
121
Canada, Non-Incendive
125
Iecex, Flame-Proof
131
Iecex, Non Sparking
136
ATEX, Flame-Proof
143
ATEX, Non Sparking
148
Appendix G Glossary
154
Appendix H Index
158
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ABB 266 MODBUS Specifications
General
Brand
ABB
Model
266 MODBUS
Category
Transmitter
Language
English
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