BMT 965 - Page 71

OZONE ANALYZER BMT 965 Manual, Rev. 01/2024
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M965_001_EN_2023
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11
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01
UINT32 32-bit unsigned integer stored in 2 sequential registers, each
big endian coded
The lower signification word is hold in the lower register, then
the higher significant.
0 … 4 294 967 295
Float32 IEEE-754 encoded 32-bit single precision floating point val-
ues stored in 2 sequential registers, each big endian coded.
The lower significant word is hold in the lower register, then
the higher significant.
-3.4E-38 … +3.4E+38
Register Addressing: The register and coil tables contain the MODBUS notation, where the reg-
ister addresses are counted starting with 1, that is not the actual content of the data message (starts
with 0).
Register Map – FC 03 (0x03), 04 (0x04), 06 (0x06), 16 (0x10)
Reg-
ister
Length Parameter
Data
Type
Byte/Word
Order
R/W Unit/Range
Function
Code
1 2 Concentration Float32 Big Endian
Low Word
R in set unit 03 (0x03)
04 (0x04) *
Big Endian
High Word
3 2 Ozone Range Float32 Big Endian
Low Word
R in set unit 03 (0x03)
04 (0x04) *
Big Endian
High Word
5 2 Pressure Float32 Big Endian
Low Word
R in bar absolute 03 (0x03)
04 (0x04) *
Big Endian
High Word
7 2 Cuvette Status Float32 Big Endian
Low Word
R dirty value in % 03 (0x03)
04 (0x04) *
Big Endian
High Word
9 2 Pressure
Range
Float32 Big Endian
Low Word
R in bar absolute 03 (0x03)
04 (0x04) *
Big Endian
High Word
11 2 Temperature Float32 Big Endian
Low Word
R in Kelvin 03 (0x03)
04 (0x04) *
Big Endian
High Word
13 2 Low Alarm
Limit
Float32 Big Endian
Low Word
R/W* in set unit
Note: needs to be lower
than current High Alarm
Limit
03 (0x03)
04 (0x04) *
16 (0x10) *
Big Endian
High Word
15 2 High Alarm
Limit
Float32 Big Endian
Low Word
R/W* in set unit
Note: needs to be higher
than current Low Alarm
Limit
03 (0x03)
04 (0x04) *
16 (0x10) *
Big Endian
High Word
17 2 Molecular
weight of car-
rier gas
Float32 Big Endian
Low Word
R --- 03 (0x03)
04 (0x04) *
Big Endian
High Word
19 2 Firmware Ver-
sion
Float32 Big Endian
Low Word
R --- 03 (0x03)
04 (0x04) *
Big Endian
High Word
21 2 Operating
Hours
UINT32 Big Endian
Low Word
R in hours 03 (0x03)
04 (0x04) *