Appendix B: Modbus Ascii Parameter Table - Thermo Scientific Isotemp -86 C Freezers Assembly, Installation And Operation

Appendix B: Modbus ASCII
Parameter Table
Protocol MODBUS ASCII
Baud Rate 2400bps to 57.6Kbps
Data Bits 7
Stop Bits 1
Parity Even
Flow Control None
Address 0 to 255
S. Function
Parameter
No Code
Cabinet
01 0x03
Setpoint (C)
Warm Alarm
02 0x03
Setpoint (C)
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Appendix B: Modbus ASCII Parameter Table

Address
Modbus
in hexa Size
Command
decimal
3A 30 31
30 33 30 35
33 30 30 30
530 2
30 32 43 35
0D 0A
3A 30 31
30 33 30 35
538 2 33 38 30 30
30 32 42 44
0D 0A
Relay
Data
Enclosure Data
Type
Response
3A 30 31
30 33 30 34
0xFF
46 46 46 46
FFF int
46 43 45 30
CE0
31 45 0D
0A
3A 30 31
30 33 30 34
0xFF
46 46 46 46
FFF int
46 44 34 34
D44
42 39 0D
0A
Remarks
Convert the data
value into signed 2's
complement and
divide with 10, which
gives the setpoint.
Ex: Signed 2's
complement of the
0xFFFFFCE0 is equal
to -800.
–800/10= –80.
So the setpoint is
–80C.
Convert the data
value into signed 2's
complement and
divide with 10, which
gives the setpoint.
Ex: Signed 2's
complement of the
0xFFFFFD44 is equal
to –700.
–700/10= –70.
So the WA setpoint is
–70 C.
Isotemp -86°C Freezers