Thermo Scientific 42iQTL, Instruction Manual

Page: 266 / 310

System Description
Firmware
8-8 42iQTL Instruction Manual Thermo Scientific
Like the hardware, the firmware is modular and located within
microprocessors distributed throughout the instrument. In the 42iQL,
microprocessors containing firmware are located as follows:
●
Reaction Chamber/PMT DMC
●
Ozonator DMC
●
NO
2
Converter
●
Flow/Pressure DMC
●
Peripherals Support Board
●
Optional I/O (Communications, Digital, and Analog)
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 42iQTL stores a historical data
log in a MySQL database. The memory is provided on the same uSD 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.
Firmware