The brewery has ten cellars divided into tanks for fermentation. Temperature in the tanks is controlled using glycine and monitored by PT100 sensors. The plant will be divided into three control systems linked by an Ethernet network. A SCADA system will provide an overview of tank status across the plant. Operators will be able to monitor temperatures, change tank modes, and view historical batch data using an HMI and SCADA interface. The project will use Modicon PLCs and software over six months for R605,906.34.

1.  Background
The brewery has ten Cellars. Each cellar is
divided into different tanks, in which the
fermentation takes place. Glycine is passed
through tubes wound round the tanks to control
the temperature during the brewing process.
A solenoid valve is used to open and close flow
of glycine. Pt100 at the top and bottom of each
tank are used to monitor the temperature. The
temperature is either monitored using the Top/
Bottom PT100 or both PT100s. should any of the
PT100 fail the PLC will switch the control
completely to the healthy one.
Each of the tanks can be in one of the following
modes: Ready, Filling, Fermentation, Chill or
Cleaning in Progress (CIP)
 AGE’s Scope of work to be done –
The plant is divided into three Control systems,
i.e. Cellar 1&2, Cellar 3-8 and Cellar 9&10.
A SCADA (Supervisory Control And Data
Acquisition) system will provide a graphical
overview of the whole control system. An
Ethernet TCP/IP network will link the three
Systems and the SCADA.
 Significant Features of the project –
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HMI will provide the operator with status of each
Cellar and Tank
SCADA system will provide a graphical overview
of the plant, with the status of each tank.
A graph of all temperatures and operator
inputted information will be available.
The fermentation manager will be able to change
the operating mode of a tank, and with a login
password he can also change the temperature
set points.
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A historical log will also be kept of all tank
batches that have been brewed
Keeping data for each batch is important
for quality purposes.
The Mode of operation of each tank will
be colour coded - determined by its
background Colour in the overview page.
A Siren and alarm lamp will be installed at
each control system to warn the operator
of an alarm condition
Products used –
 Modicon TSX Premium from Schneider
Electric
 PLC software - PL7 Pro for TSX Premium
PLC
 HMI - is an EZTOUCH, Modbus/TCP 8” Slim
panel
 SCADA System - Intouch version 9, with
1000 tag licence
 Spider, 5 port 10/100 Ethernet switches for
each Control system
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Duration of the project –
6 months
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Total Value –
R 605,906.34