Thermo Fisher Scientific ULT Freezers
Appendix B: Modbus ASCII Parameter Table | 31
3
Cold Alarm
Setpoint
(C)
0x03
53C
2
3a 31 39
30 33
30
35 33 43
30 30 30
32 41 31
0d 0a
3A 31 39
30 33 30
34
46 46
46 46 46
43 37 43
36 36 0D
0A
0xFF
FFFC
7C
int
convert the data value into
signed 2’s complement
and divide with 10, which
gives the setpoint.
EX: signed 2’s comple
-
ment of the 0xFFFFFC7 is
equal to -900.
-900/10=-90. So the CA
setpoint is -90C.
4
System Bill
of Material
Part
Number
0x03
570
10
3a 31 39
30 33
30
35 37 30
30 30 30
41 36 35
0d 0a
3A 31 39
30 33 32
34
33 31
33 35 33
35 34 34
35 32 33
30 34 31
33 30 33
31 35 32
32 30 32
30 32 30
32 30 32
30 32 30
32 30 32
30 32 30
32 30
44
30 0D 0A
155D
R0A0
1R
String
All the remaining are
spaces.
5
Product ID
0x03
598
2
3a 31 39
30 33
30
35 39 38
30 30 30
32 34 35
0d 0a
3A 31 39
30 33 30
34
30 30
30 31 45
32 34 30
42 39 0D
0A
0x00
01E2
40
unit
123456 would be
enclosed as 0x01E240.
6
Control
Model
0x03
59C
1
3a 31 39
30 33
30
35 39 43
30 30 30
31 34 32
0d 0a
3A 31 39
30 33 30
32
30 34
44 45 0D
0A
0x04
uchar
Note: bits b4:b1
0000: PEEK Production
code (CNTRL 0)
0002: Variable speed
compressor (CNTRL 2)
0003: single Speed and
Cascade System
(CNTRL 3)
0004: Single Speed and
Single Stage System
(CNTRL 4)
0005: Single Speed and
Cascade System
(CNTRL 5)
S.No
Parameter
Function
code
Address in
hexadecimal
Size
Modbus
command
Relay
Enclosure
Response
Data
Data
Type
Remarks
