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Modbus
Parameters
Supported
Thermo Fisher Scientific
Table
Table B–1
through
for the Omni FTIR Multi Gas CEMS.
IMPORTANT NOTE The addresses in the following table are Protocol Data
Unit (PDU) addresses. For Application Data Unit (ADU) addresses, add
40000 to these numbers for holding registers. Verify the register number
on your Modbus master to ensure that it matches the register number on
the instrument.
▲
Note For additional information on how to read registers and interpret the
data, refer to the
"(0x03) Read Holding
appendix.
▲
Table B–1. Modbus Read Registers
Register Number
1 & 2
3 & 4
5 & 6
7 & 8
9 & 10
11 & 12
13 & 14
15 & 16
17 & 18
19 & 20
21 & 22
101 & 102
103 & 104
105 & 106
107 & 108
109 & 110
111 & 112
113 & 114
115 & 116
Table B–4
lists the Modbus addresses supported
Registers" section in this
Variable
SO2 CONC
NO CONC
NO2 CONC
N2O CONC
NH3 CONC
HCl CONC
HF CONC
CO CONC
CO2 CONC
H2O CONC
SF6 CONC
SYSTEM STATUS
SYSTEM FLAGS
SAMPLE TEMP
PUMP TEMP
INLET TEMP
OUTLET TEMP
CELL TEMP
CELL PRES
Omni FTIR Multi Gas CEMS Instruction Manual
Modbus Protocol
Modbus Parameters Supported
B-5
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