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Archive: Category «Industrial Automation»

How to select AC converter for VSD?

Altough manufacturers’ catalogues try to make it easy as possible, there are many variables associated with the selection and rating of the optimum electric motor and AC converter for a… Read more

Jan 06, 2012 | Edvard

Variable Speed Drives (VSD's) used for submersible pumps

PROFIBUS at a Glance

PROFIBUS is an open, digital communication system with a wide range of applications, particularly in the fields of factory and process automation. PROFIBUS is suitable for both fast, time-critical applications… Read more

Dec 24, 2011 | Edvard

PROFIBUS - Optical connection

When we started to use PLCs after all?

PLCs (Programmable Logic Controllers) were first introduced in the 1960’s. The primary reason for designing such a device was eliminating the large cost involved in replacing the complicated relay based… Read more

Dec 21, 2011 | Edvard

When we started to use PLCs after all?

Why do we need variable speed drives (VSD)?

There are many and diverse reasons for using variable speed drives. Some applications, such as paper making machines, cannot run without them while others, such as centrifugal pumps, can benefit… Read more

Nov 25, 2011 | Edvard

Danfoss - VLT AutomationDrive Series

How Stuxnet (PLC virus) spreads – Part 3

Continued from How Stuxnet (PLC virus) spreads – Part 2 » Read here Given the well-secured industrial control system described above, how could a worm like Stuxnet ever penetrate all the… Read more

Aug 03, 2011 | Edvard

How Stuxnet (PLC virus) spreads

How Stuxnet (PLC virus) spreads – Part 1

The Stuxnet worm is a sophisticated piece of computer malware designed to sabotage industrial processes controlled by Siemens SIMATIC WinCC and PCS 7 control systems. The worm used both known… Read more

Jul 20, 2011 | Edvard

How Stuxnet (PLC virus) spreads

GIS control system

For ease of operation and convenience in wiring the GIS back to the substation control room, a local control cabinet (LCC) is provided for each circuit breaker position (Figure 1)…. Read more

May 29, 2011 | Edvard

GIS control system

KNX automation makes buildings more efficient

In light of climate change and increasingly scarce resources, the energy-efficient operation of buildings is gaining in importance. Essential requirements for this are an energy-efficient architectural design, an insulated building… Read more

Apr 15, 2011 | Edvard

KNX automation makes buildings more efficient

Information flow in the human-machine interface

Operators play an important part in the human-machine dialogue.They must use the information they have to perform actions that make the machines and installations run properly without endangering safety and… Read more

Jan 15, 2011 | Edvard

Information flow in the human-machine interface

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