ABB 2600T Series Instruction Manual page 50
266 with foundation fieldbus communication
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Also See for 2600T Series:
- Operating instructions manual (96 pages) ,
- Operating instruction (84 pages) ,
- Instructions for installation and commissioning (24 pages)
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50
2 6 0 0 T S E R I E S | P R E S S U R E T R A N S M I T T E R S | O I/ 2 6 6/ F F - E N R E V. E
APPENDIX A – Device Data Blocks
The device parameters are listed in the following tables. You can access the parameters by means of the index number. The
individual blocks each contain standard parameters, block parameters and manufacturerspecific parameters.
Using DD based configuration tools as an operating program, input screens are available as a user interface.
Analogue variable format
The output of each AI block as well as many variables calculated and available from the different blocks of the transmitter is
composed of 5 bytes.
The Variable is of 32-bit size in Floating Point format (4 bytes) plus a Status Byte (1 Byte).
Variable format - Floating Point Format IEEE-754
Byte n
Bit 7 Bit 6
S
2
2
2
2
2
2
7
6
5
4
3
2
EXPONENT
Example:
40 F0 00 00 (hex) = 0100 000 111 000 000 000 000 000 (binary)
Calculation: Value = (-1)
* 2
S
Value = (-1)
* 2
0
Value = 1 * 4 * (1 + 0.5 + 0.25 + 0.125) = 7.5
Status
The Status byte is the fifth byte of any out value and represents the Quality of the variable. Each Transducer and Function Block
produces a specific set of Status Bytes.
IMPORTANT
Refer to the specific Block in order to see which Status bytes it produces.
Byte n + 1
Bit 7 Bit 6
2
2
2
2
2
2
2
1
0
-1
-2
-3
-4
-5
MANTISSA
* (1 + Mantissa)
(Exponent – 127)
* (1 + 2
+ 2
+ 2
)
(129 – 127)
-1
-2
-3
Byte n + 2
Bit 7
2
2
2
2
2
2
2
-6
-7
-8
-9
-10
-11
-12
MANTISSA
Byte n + 3
Bit 7
2
2
2
2
2
2
2
-13
-14
-15
-16
-17
-18
-19
MANTISSA
2
2
2
2
-20
-21
-22
-23
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