ABB 266 MODBUS - Page 95

Appendix C MODBUS® register lists
266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB | 87
Register Address
Data
Type
Object description
Read/
Write
Added
Ext.
32 bit
16 bit
23
405 – 406
F
Process Temperature (Damping, Calibration and Units applied) floating point, 405
is high word, 406 is low word.
This may be external RTD or sensor value depending on configuration
RO
24
407 – 408
F
Mass flow rate value
RO
25
409 – 410
F
Volume Flow rate value
RO
26
411 – 412
U32
Diagnostic status flag words 1 and 2
RO
27
413 – 414
U32
Diagnostic status flag words 3 and 4
RO
28
415 – 416
U32
Diagnostic status flag words 5 and 6
RO
41
441 – 442
F
DP calibration high point (span) Default URL.
See 481 for unit of value
R/W
42
443 – 444
F
DP calibration low point (offset). Default LRL.
See 481 for unit of value
R/W
43
445 – 446
F
SP calibration high point (span) Default URL.
See 482 for unit of value
R/W
44
447 – 448
F
SP calibration low point (offset). Default LRL.
See 482 for unit of value
R/W
45
449 – 450
U16
Calibration Unit Pressure
Register 449 is not a register, and it returns zero when read, and does nothing
when written.
Register 450
Default (65535) reads as register 481 until it is written.
Values:
1 = Inches H2O 4C
2 = Inches HG 0C
3 = Feet H2O_68F
4 = Millimeter H2O_68F
5 = Millimeter HG 0C
6 = PSI
7 = BAR
8 = Millibar
9 = Gram per square centimeter
10 = Kilogram per square centimeter
11 = Pascal
12 = Kilopascal
13 = Torr
14 = Atmosphere
117 = Megapascal
16 = Inches H2O 60F
17 = Inches H2O 68F
Default 65535 reverts back to using 481 unit
R/W
46
451 – 452
F
T calibration high point (span) default URL.
See 483 for unit of value
R/W
47
453 – 454
F
T calibration low point (offset) default 0 °C.
See 483 for unit of value
R/W
48
455 – 456
U16
Calibration Unit Temperature
Register 455 is not a register, and it returns zero when read, and does nothing
when written.
Register 456
Default (65535) reads as register 483 until it is written.
Values:
32 = Degree Celsius
33 = Degree Fahrenheit
34 = Degree Rankine
35 = Degree Kelvin
65535 Default reverts back to using 483 unit
R/W
49 – 50
457 – 460
RESERVED un-implemented registers
All access returns an ILLEGAL FUNCTION error code.
NONE
51
461 – 462
F
DP Damping time constant (Default 0.0 = disabled)
R/W