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In-Depth Information
The supervisory console should visualize the paint tonality in accordance
with the paint composition of the mixture tank. The output flow and
volume of the spray pump should be consistent with the values set by the
technician in the supervisory console.
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13.3
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Architecture and planning
The system architecture is made up of four main subsystems as described in
Figure 13.3. The simulator component models the physical equipment of the
work cell and enforces the physical consistency constraints.
The tank controller and mixture controller components monitor the paint
level in the tanks and control the input and output pumps in order to regu-
late the paint level. The mixture controller sends commands to the tank
controller in order to regulate the composition of fundamental colours in the
mixture tank. Every controller has a local console that allows the technician
to operate the equipment directly.
The supervisory component implements the supervisory console that
displays the tonality of the paint in the mixture tank and allows the tech-
nician to change the colour composition and to regulate the output flow and
volume of the spray pump.
The development process of the SCADA system is organized into three
phases that produce three prototypes.
Prototype 1: Work cell simulation
. A standalone application that simu-
lates the physical work cell. A graphical user interface depicts the equip-
ment as in Figure 13.1 and allows the user to open and close the pumps
manually.
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sets colours
controls flows
controls flows
Tank controller
Mixer controller
Supervisor
controls flows
monitors tanks
controls flows
monitors tanks
monitors
tanks and
pumps
Simulator
Figure 13.3
The system architecture
