PLCs, DCSs & Controllers


Siemens extends the Simine ­portfolio

June 2019 PLCs, DCSs & Controllers

Siemens has extended the Simine portfolio for high-pressure grinding mills (HPGR) to include a new controller. Plug-and-play functionality makes the load share controller available for immediate use. The web-server based operator interface allows the process engineer at any time (on-line and off-line) to adapt the controller parameters and thus optimise the torque distribution. The controller it is already being successfully used by one customer, where tests done before and after optimisation have demonstrated significant benefits for the mill.

The new controller follows an established scheme. During startup of the HPGR, it is inactive, but once a certain torque level has been reached, the controller takes over the load share regulation. If the controller is not ready for use, for example in the event of disruption, the drives do not start. However, operation without load sharing is available and in this case the drives take the speed reference from the mill automation.

Variable load distribution

The load distribution between the rollers in an HPGM is generally 50:50. The master follows the speed command and the slave follows the torque of the master. If an alternative load distribution is required, it is possible to change the load distribution between the drives using the load distribution factor. The reference torque on the slave drive is then decreased or increased compared to the reference torque of the master drive. At the same time, the load share controller maintains the speed difference between the rolls within given limits. Via the web-server based operator interface, the process engineer can adjust the load share factor and limitation for speed difference at any time – even during grinding operation.

The plug-and-play system is supplied fully tested and ready for use. The webserver functionality allows the process and production engineers quick and easy access to the parameters of the controller. Programming skills or special equipment knowledge is not required.

Successful utilisation

KHD Humboldt Wedag, an OEM in the cement and mining industry, is already using the load share controller in its Conakry project. Before and after tests show the benefits of using this controller: amongst other things, changes in the roll gap and roll pressure could be kept in a substantially smaller range.

For more information contact Jennifer Naidoo, Siemens Digital Industries, +27 11 652 2795, jennifer.naidoo@siemens.com, www.siemens.co.za



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Intelligent data glasses support production
November 2019, Siemens Digital Industries , IT in Manufacturing
Augmented Reality (AR) has arrived in the workplace: for the last three years, a consortium of six companies and institutions chaired by Siemens has been researching the use of augmented reality (AR) ...

Read more...
VinFast deploys Siemens technology to deliver cars ahead of schedule
November 2019, Siemens Digital Industries , System Integration & Control Systems Design
VinFast, Vietnam’s first volume car manufacturer, has successfully produced its first cars ahead of schedule using Siemens’ portfolio of integrated software and hardware. By deploying its portfolio, Siemens ...

Read more...
Meet the Future: Edge Programmable Industrial Controllers
November 2019, Opto Africa Holdings , PLCs, DCSs & Controllers
All controls engineers are familiar with PLCs and PACs (programmable automation controllers). Both have been used and improved over many years, incorporating capabilities that used to be found only in ...

Read more...
Siemens launches report on Dawn of Digitalisation and its Impact on Africa
October 2019, Siemens Digital Industries , IT in Manufacturing
Africa needs a digitalisation strategy to compete in the global economy.

Read more...
Precise control in joining applications
October 2019, ASSTech Process Electronics + Instrumentation , PLCs, DCSs & Controllers
Digiforce is the trusted name when comprehensive monitoring of press-fit, joining, riveting and caulking processes is needed. The models 9306 and 9310 are being successfully used in innumerable applications ...

Read more...
Siemens South Africa puts Smart City vision into action
September 2019, Siemens Digital Industries , News
Fourteen months ago, Siemens installed a microgrid at its headquarters in Midrand and data shows it is using 50% less supplied energy, drawing it from solar resources instead. By extracting energy off ...

Read more...
Reliable gas production
September 2019, Siemens Digital Industries , IT in Manufacturing
Energy supplier uses Siemens technology for optimum information exchange.

Read more...
Automotive supplier relies on Siemens PLM solution
September 2019, Siemens Digital Industries , IT in Manufacturing
Küster Automotive is an internationally active family-run company and a part of Küster Holding. A full-service supplier, Küster manufactures components for the automotive industry. For its production ...

Read more...
Siemens launches the Digital Enterprise Series
August 2019, Siemens Digital Industries , News
The digital transformation of the producing economy is gaining momentum. It enables new opportunities for value creation, innovative business models and trendsetting forms of cooperation. Now is the time ...

Read more...
Engineering is shaping the future
August 2019, Siemens Digital Industries, TANDM Technologies , News
Engineering is shaping what the future will look like and is evolving as quickly as technology itself. This year’s highly successful Engineering Community Conference (ECC) hosted by ESTEQ at the CSIR ...

Read more...