Appendix B: Modbus Ascii Parameter Table - Thermo Scientific TDE Series Manual

Appendix B: Modbus ASCII
Parameter Table
The MODBUS interface is intended to be used with cable DLCPTDATA101 (328928H02)
If you plan to use your own harness:
J6, pin 3 is RS485A
J6, pin 2 is RS485B
J6, pin 5 is ground
Protocol MODBUS ASCII
Baud Rate 2400bps to 57.6Kbps
Data Bits 7
Stop Bits 1
Parity Even
Flow Control None
Address 0 to 255
Function
S.No Parameter
code
cabinet
1 0x03
setpoint (c)
Warm
2 0x03
Alarm
Setpoint
(C)
30 |

Appendix B: Modbus ASCII Parameter Table

Address in Modbus
Size
hexadecimal command
3a 31 39
30 33 30
35 33 30
530 2
30 30 30
32 41 44
0d 0a
3a 31 39
30 33 30
538 2
35 33 38
30 30 30
32 41 35
0d 0a
Relay
Data
Enclosure Data
Type
Response
3A 31 39
30 33 30
34 46 46
0xFFF
46 46 46
FFCE int
43 45 30 0
30 32 0D
0A
3A 31 39
30 33 30
34 46 46 0xFF
int
FFFD
46 46 46
44
44 34 34
39 44 0D
0A
Thermo Fisher Scientific ULT Freezers
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.
covert the data value int0
signed 2's complement
and divide with 10, which
gives the setpoint.
EX: signed 2's comple-
ment of the 0xFFFFFD44
is equal to -700.
-700/10=-70.
so the WA setpoint is
-70C.