Specifications

Maxum II Operation Overview, Continued
The Embedded Sensor Near Electronics (EMSNE) software takes the
place of a physical SNE Controller board (SNECON) that is used many
configurations of Maxum analyzer. In the modular oven configuration,
this function is performed by the processor on the Communication and
Control (CAC3) board, which resides on the CIM board. The digital
signal output from the DPM is sent to the CIM board via the I
2
C bus and
processed by the EMSNE software. The EMSNE software manages and
controls all chromatography functions to perform the compositional
analysis of the input stream.
Embedded Sensor Near
Electronics
The Control Interface Module (CIM) is an assembly located on the door
of the Maxum II. The assembly consists of a CIM-Base module, a CAC3
processor module that is mounted on the CIM-Base, and a touch screen
display user interface. The CIM controls all external and internal
communication for the analyzer.
Control Interface Module
In the Modular Oven configuration, the CIM performs both SNE software
functions (called Embedded SNE, or EMSNE) as well as primary
processor functions. This includes combining all data results from the
EMSNE software and performing additional high level data processing
and calculations. The CIM also connects to other devices, such as other
analyzers, printer, or Modbus. .
The CIM is the analyzer control system in addition to containing the
application database. The application database also contains analytical
hardware database definitions that are used to perform the following
functions:
• Obtain desired sampling measurements
• I/O and EMSNE schedule of timing events
• Sequence of sampling streams
• Calculations of calculated values
• Formatting of results and location, and outputting results
• How to report or correct error conditions
I
2
C Bus
The CIM communicates with the electronics enclosure (EC) installed
modules via the I
2
C bus (Inter-Integrated Circuit bus). The I
2
C is a serial
communication bus that is sourced in the CIM. The CIM is equipped with
two I
2
C buses. Bus A is used for communication with EC installed
modules and Bus B is available for other uses (such as interface to a
Siemens Smart Sampling System).
The PECM-DC is used to distribute the internal I
2
C bus and is equipped
with multiple bus connectors for this purpose.
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