OZONE ANALYZER BMT 965 Manual, Rev. 01/2024
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73
* This function requires firmware version 1.05 or higher.
Register Map – FC 16 (0x10)
For backward compatibility to legacy BMT 964 and BMT 965 V1.04 or below
Reg-
ister
Regis-
ter
Length
Parameter
Data
Type
Byte/Word
Order
R/W Unit/Range
Function
Code
1 1 Ozone Unit UNIT16 Big Endian W 0: g/Nm3
1: %wt/wt
2: ppm(v)
3: g/m3 (without pressure
and temperature compen-
sation)
4: ppm(w)
5: wt (air)
16 (0x10)
2 2 Low Alarm Limit Float32 Big Endian
Low Word
W in set unit
Note: needs to be lower
than current High Alarm
Limit
16 (0x10)
Big Endian
High Word
4 2 High Alarm Limit Float32 Big Endian
Low Word
W in set unit
Note: needs to be higher
than current Low Alarm
Limit
16 (0x10)
Big Endian
High Word
7 1 Auto Zero Inter-
vall
UINT16 Big Endian R [0 … 99] in hours
0: auto zero is disabled
16 (0x10)
Read Coil Map – FC 01 (0x01)
Coil Description Comment
1 Low Alarm Read Coil (FC 01) is used to request binary status infor-
mation from the instrument. The query consists of a start coil
number (first register to receive data from) and the quantity
of bits to read. The least significant bit of the first data byte
contains the status of the addressed start coil. The other
coils status information follows toward the high-order end of
this byte and from low order to high order in subsequent
bytes. If the returned coil quantity is not a multiple of eight,
the remaining bits in the final byte will be padded with zero.
Status information:
ON – active – logical 1
OFF – inactive – logical 0
2 High Alarm
3 Low Alarm Enabled
4 Low Alarm Latched
5 High Alarm Enabled
6 High Alarm Latched
7 Lamp Low Warning
8 Lamp Low Error
9 Lamp Off Error
10 Lamp High Error
11 Cuvette Dirty Warning
12 Cuvette Dirty Error
13 Overrange Error
14 Overpressure Error
15 EEPROM Error
16 Zeroing
17 Warming Up
18 SD Card Warning
19 Low Press Error
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