Thermo Scientific Omni FTIR Multi Gas CEMS Instruction Manual page 62

Operation
Data Server Software
ImaccModbus/
ImaccModbus
3-16 Omni FTIR Multi Gas CEMS Instruction Manual
ImaccModbus.exe and ImaccModbusTCP.exe provide Modbus
connectivity via serial and Ethernet communications, respectively. Refer to
Appendix B,
TCP
instructions.
To change the compound, file type, or register information, simply enter
the new setting in the Modbus window; the entries are automatically
updated in the registry when the program is closed. Clicking on cells in the
compound and file type columns will cause pull down menus of the
permissible entries to be displayed. Click on the desired entry to select it.
When a new concentration file is created, it will contain nothing but the
header record until the first FTIR integration period has been completed.
The Modbus program will return zeros during that time.
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 Appendix B,
"Modbus Protocol" for detailed Modbus configuration
▲
"Modbus Protocol". ▲
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