Thermo Scientific TSX Series Installation And Operation Manual page 75

Function
S.No Parameter
Code
17 TC10 0x03
Display
Managed
18 RTD 0x03
Temperatu
re
70 | Appendix D: Modbus ASCII Parameter Table
Address in Modbus
Size
hexadecimal Command
3a 31 39
30 33 30
34 45 43
4EC 2
30 30 30
32 46 32
0d 0a
3a 31 39
30 33 30
35 30 30
500 2
30 30 30
32 44 44
0d 0a
Relay
Data
Enclosure Data
Type
Response
3A 31 39
30 33 30
0x4
34 34 31
1BE
42 45 32 Float
2C7
43 37 45
E
33 33 0D
0A
3A 31 39
30 33 30
34 46 46 0xF
46 46 46 FFF int
46 42 33 FB2
32 43 0D
0A
Ultra Low Temperature Freezers
Remarks
Convert the Float to
decimal with below steps.
1.Open the link https://
www.h-schmidt.net/
FloatConverter/
IEEE754.html
2.Paste the data in
"Hexadecimal
Representation" and press
Enter.
3.The temp value is shown
in "Decimal
representation".
Convert the data value into
signed 2's complement
which gives the data.
Ex: Signed 2's
complement of the
0xFFFFFB2 is equal to -78.
So the Display Managed
RTD Temperature value is 
-78°C.