classic | mobile


SA Instrumentation & Control Buyers' Guide

Technews Industry Guide - IIoT 2018

Technews Industry Guide - Maintenance, Reliability & Asset Optimisation


Tank control at Klawer
February 2009, SCADA/HMI

Ana-Digi Systems and Adroit Technologies teamed up for the Klawer project in 2005 to ensure that Klawer remains one of the major players in Cape Town as a leading producer of quality wines.

Klawer, situated in southern Namaqualand 260 km from Cape Town, required a no-nonsense, easy to use, reliable solution for its wine tank control system along with world class support and back-up.

It was decided to use the LS GM4 PLC and LS iG5 inverters as the basis for a reliable and flexible control system. Adroit Scada was chosen as the preferred operator interface medium as it offered ease of usage, flexibility, good graphics and expandability. As Adroit Technologies is a South African-based company, the client was further assured of continued service and support.

In 2005, Klawer Wine Cellars had virtually no tanks for fermentation and maturation of wines. It acted as a receiving depot for grapes from the area, but once crushed, the grape juice had to be pumped into container vessels and trucked to Trawal Wines, a sister winery some 20 km away, for further processing.

The decision was made to process its own wines under its own name of Klawer Wine Cellars. A refrigerated hall was built and the order was given for the manufacture of 12 maturation tanks and 10 fermentation tanks. The rapidly expanding local wine industry required new solutions for handling the ever increasing grape yields from the Klawer area. It offered Klawer Wine Cellars the opportunity to become a major player in the handling, processing and sale of wine in the region.

The 10 main fermentation tanks are used mainly for white wine processing, or for temporary wine storage. Six more fermentation tanks have since been added to supplement the needs of the plant. All the fermentation tanks are equipped with temperature probes and solenoid valves for controlling wine temperature. Cold glycol is pumped through the jacketed walls of the tanks for cooling, and temperature set-points are entered via the Adroit Scada system.

The 12 maturation tanks are used mainly for processing red wine, which requires more care and longer processing than white wines do. For this purpose, the maturation tanks are equipped with more equipment such as stirrers fitted on the bottom of the tanks and pumps for recirculating the wine. Sprayer nozzles on the top of the tank ensure an even distribution of the recirculated wine over the top surface of the tanks.

The maturation tanks are likewise cooled by glycol being pumped through the walls of the tank. Temperature probes and solenoid valves allow for temperature control; pressure transducers fitted into the bottom of the tanks are used for tank level indications and pump low level safety monitoring.

During maturation, the temperature control of the tanks is critical, as the grape yeast and fermentation process generates a lot of heat in the tank. A cake of grape skins and husks forms and tends to float to the top of the tank. If not controlled, the wine can overheat and the cake can solidify. The cake would then require forceful breaking up to remove once the wine is pumped out of the tank.

The solution is to continuously stir the wine in the tanks and to cyclically recirculate the wine. Recirculation allows for wetting of the cake by spraying the wine back into the top of the tank. Pumps are equipped with LS frequency inverters which are used to vary the pump speeds. The varying pump pressure ensures that the whole of the cake is sprayed.

Critical variable parameters such as temperature set-points, pump cycle times and variable pump speeds are all addressed through the Adroit Scada screens. Once set up, the system runs automatically day and night during the wine processing season.

Klawer Wine Cellars has become a major player in the area as a leading producer of quality wines within a short space of time. Not only does it produce its own wines, it matures wines for many neighbouring wineries as well. The streamlined handling process has drawn in farmers from far and wide to deliver their grapes to Klawer Wine Cellars. In certain cases, the farmer can choose to get paid for the tonnage of grapes delivered or on yield quantities after crushing, the tank level control is used for determining the wine yield quantities.

Support and backup is provided by Ana-Digi Systems of Cape Town. The flexibility of the system allows for easy expandability up to 32 remote stations. At present, the remote GM6 PLC, required for the new fermentation tanks, is connected on a LS F-Net bus system. F-Net is an LS fieldbus network which is fast, reliable and easy to set up. User friendly operator interfacing via Adroit Scada means that relatively unskilled workers can operate the system. Seamless expansion of the Scada package and version compatibility has been vitally important over the last four years.

The control system has recently been expanded. The Adroit Scada package has since been upgraded from 150 to 300 scan points, and the LS GM4 PLC has been expanded to include a remote GM6 slave rack, when six new fermentation tanks were added at the end of 2007.

The relationship between Adroit Technologies and Ana-Digi Systems has provided many of its clients with a proven and trusted solution to their automation needs. The support and backup provided by Adroit Technologies is fully appreciated by both Ana-Digi Systems and its clients. In the future, this combination of Adroit Scada and LS PLC equipment will continue to provide many more users with the same peace of mind that their automation needs have been fully met.

For more information contact Keith Gross, Ana-Digi, +27 (0)21 914 9030, or Dave Wibberley, Adroit Technologies, +27 (0)11 658 8100,

Supplied By: Ana-Digi Systems
Tel: +27 21 914 9030
Supplied By: Adroit Technologies
Tel: +27 11 658 8100
Fax: +27 11 658 8101
Share via email     Share via LinkedIn   Print this page

Further reading:

  • Operator guided solutions
    December 2018, Adroit Technologies, IT in Manufacturing
    At parts assembly production sites, where parts are picked from stock, it is almost inevitable that picking mistakes will occur. As parts become more complex and their component types increase, the problem ...
  • LSIS is changing perceptions
    October 2018, Ana-Digi Systems, News
    Ana-Digi Systems saw the opportunity to become the importers and distributors of the LG premium brand of automation and drive products in 1999, and first took the LG automation systems to the Electro ...
  • Inductive Automation’s I­gnition technology offers potential to ­disrupt the market
    July 2018, Mzukulu Technologies, SCADA/HMI
    ‘Ignition by Inductive Automation’ is an industrial software platform with a variety of modules that can be combined to create custom HMI, scada and MES solutions.
  • New platforms for HTML5 visualisation
    Technews Industry Guide: Industrial Internet of Things & Industry 4.0, Phoenix Contact, SCADA/HMI
    Easy and flexible implementation of current and future demands.
  • Latest generation compact inverters from Mitsubishi Electric
    June 2018, Adroit Technologies, Electrical Power & Protection
    Mitsubishi Electric has now introduced its latest generation of compact inverters, the FREQROL-CS80 series.
  • Yokogawa’s open scada solution
    June 2018, Yokogawa South Africa, SCADA/HMI
    Scada systems are typically used for supervisory monitoring and control of remote and geographically distributed assets through a more open platform for interfacing with several makes and types of equipment ...
  • Schneider gets smart with new HMI solution
    June 2018, Schneider Electric South Africa, SCADA/HMI
    In a world where quick access to data has become the key to efficiency, Schneider Electric South Africa’s latest innovation in the Magelis range of HMI solutions, Magelis GTU, allows users to create the ...
  • Scada Review 2018
    June 2018, Technews Publishing (SA Instrumentation & Control), SCADA/HMI
    The subject projects of this year’s Scada Review are a worthy reflection of the effort put in by the respondent end-users, SIs and vendors. It is encouraging to see that even in these times of economic ...
  • Scada review 2018: Adroit Technologies
    June 2018, Adroit Technologies, SCADA/HMI
    End-user details    Name: Raymond Bosch    Designation: Electrical foreman cold stores    Company: Two a Day Group    Phone: +27 (0)21 859 7666    E-mail:       SI details    Name: Willie Cameron ...
  • Scada Review 2018: Wonderware
    June 2018, IS³ - Industry Software, Solutions & Support, SCADA/HMI
    End-user details    Name: Jaco van Heerden    Designation: Project C&I Engineer    Company: African Rainbow Minerals Limited    Phone: +27 (0)11 518 4199    email:       SI details    Name:...
  • Adroit Scada validated as an IoT platform
    May 2018, Adroit Technologies, SCADA/HMI
    Last year, Adroit Technologies expanded its offerings through its partnership with Sqwidnet, the licensed Sigfox Internet of Things (IoT) network operator in South Africa. From the mid-March, Adroit has ...
  • HMI modular system for hazardous areas
    May 2018, Pepperl+Fuchs, SCADA/HMI
    HMI systems must satisfy the strictest requirements if they are to be used in explosion-hazardous areas. With this in mind, Pepperl+Fuchs has introduced a wealth of new developments for its VisuNet GXP ...

Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronic Buyers Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Terms & conditions of use, including privacy policy
PAIA Manual


    classic | mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.