System Description
Firmware
8-8
42iQLS Instruction Manual
Thermo Scientific
Like the hardware, the firmware is modular and located within
microprocessors distributed throughout the instrument. In the 42iQLS,
microprocessors containing firmware are located as follows:
●
Reaction Chamber/PMT DMC
●
Ozonator DMC
●
Flow/Pressure DMC
●
Peripherals Support Board
●
Optional I/O (Communications, Digital, and Analog)
●
Optional Oxygen Sensor
The firmware contains the active controls for their application, as well as
self-identification and configuration for “plug and play” style operation.
Each are associated with specific registers of two types:
●
Modbus registers that are communicated from each microprocessor to
the System Controller Board (SCB) via internal RS-485
●
SNMP registers that are maintained in the software and SCB for health
and data processing computation
The Modbus communication system operates on 1 second intervals.
Within those intervals, data treatment like integration (whether analog or
digital) and servo control, are embedded in the module firmware. The SCB
receives the 1 second updates for higher level “software” processing and
control via SNMP registers, some of which is interfaced with the front
panel Graphical User Interface (GUI).
In addition to the operating registers, the 42iQLS stores a historical data
log in a MySQL database. The memory is provided on the same micro SD
card where the operating software resides, for which there is capability to
store up to a year of data at 1 minute intervals. Chapter 3, “
Operation
”
describes how this database is accessed and used including external memory
downloads.
The 42iQLS can be configured with an optional DMC based Oxygen (O
2
)
Sensor. This sensor is a paramagnetic sensor for O
2
concentration
measurement and CO correction. This option allows the user to correct the
NO, NO
2
, and NO
x
readings for the amount of oxygen in the sample.
Selectable O
2
concentrations can be used as the correction factor.
Firmware
Oxygen Sensor
(optional)
Summary of Contents for 42iQLS
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