36 | Appendix B: Modbus ASCII Parameter Table
Thermo Fisher Scientific ULT Freezers
20
System
Status
0x03
671
1
3a 31 39
30 33
30
36 36 46
30 30 30
31 36 45
0d 0a
3A 31 39
30 33 30
32
32 38
42 41
0D 0A
0x28
uchar
b0 - Temperature pull down
attained,
b1 - Power failure,
b2 - Main - UI comm failure,
b3 - Service Mode Active,
b4 - main shutdown,
b5 - BOT status (set only
after entry to BOT),
b6 - unused,
b7 - Bus comm failure
21
Relay
Enclosure
Status
0x03
674
2
3a 31 39
30 33
30
36 37 30
30 30 30
32 36 43
0d 0a
3A 31 39
30 33 30
34
30 30
30 35 30
30 30 30
44 37
0D 0A
0x00
0500
00
unit
b0 - Bus Solenoid Injection
b1 - Bus Pressure switch
b2 - Reserved for factory
use only
b3 - Line voltage circuit
state change (normal, buck,
boost)
b4 - Compensated line
voltage change
b5 - Reserved for factory
use only
b6 - Short cycle active
b7 - 4-20mA digital to
analog converter data
corrupt
b8 - Next Power up state
b9 - Door1 Open
b10 - Door2 Open
b11 - Warm temperature
alarm test Active
b12 - Read Reset status
register
b13 - Water cool system
pressure sensor state
(water cooled units only)
b14 - 4-20mA digital to
analog converter over temp
fault
b15 - 4-20mA digital to
analog converter over
current of the integrated
chip fault
b16 - Main memory corrupt
b17 - Back up memory
corrupt
S.No
Parameter
Function
Code
Address in
hexadecimal
Size
Modbus
Relay
Enclosure
Response
Data
Data
Type
Remarks
