Product category:
Process Control: SCADA, ERP, MES and networks
News Release from: Citect | Subject: CitectSCADA
Edited by the Processingtalk Editorial
Team on 27 December 2007
Getting more out of process control
networks
The latest version of CitectSCADA offers all the cost reduction benefits of Clustering; but what is Clustering, and how are its benefits applicable to process environments?
In any process control system there is requirement to strike a balance between the need for centralisation and the need for localisation How best can the process control engineer centralise operations without raising network reliability risks or losing localised system functionality? How best to leverage the control system most effectively even while attempting to reduce redundant hardware costs? Clustering is an answer to all these problems
This article was originally published on Processingtalk on 10 Dec 2003 at 8.00am (UK)
Related stories
SCADA system launched for facilities managers
Citect has launched CitectSCADA Facilities, a flexible, open, control and monitoring package for facilities management companies and the commercial building sector
Work with the complete new Citect SCADA suite FREE
Citect is offering the opportunity to work with their complete new SCADA v5.5 suite for free: the software has a run time limited to 15 mins, but users can start developing SCADA projects now!
Through Clustering, process environments can reduce the high costs associated with multiple redundancies in hardware, while still ensuring server availability.
When combining sites, the Clustering approach reduces the cost of control rooms as well as the manpower at those centres without compromising on close-to-process system functionality.
Clustering can also be used to split sites into reliable sub-clusters to increase overall system capacity or spread system load.
Further reading
Citect offers mobile plant control for GBP995
Citect is offering new and existing users of its CitectSCADA system the benefits of mobile plant monitoring and control - "in the palm of the hand" - anywhere, anytime
53 stream fiscal and allocation metering system
The EnCana Scott Platform in the North Sea is leading the way in fiscal metering of oil and gas as a result of installing MeterNet, a technically advanced, PC based flow metering computer system
CitectSCADA Batch aids regulatory compliance
The introduction of a batch management option to CitectSCADA enhances the capability to provide regulatory compliance and reduced operational risk in all processing and manufacturing operations
In a process control environment, Clustering is combining multiple SCADA systems to provide a single unified operator interface.
Organisations can cluster alarms, trends, reports or I/O tags such that multiple systems that were once monitored by multiple operators can now be viewed and monitored by one operator across those systems.
Clustering achieves this by working on a process-basis rather than machine-basis.
A simple example that illustrates the benefits of Clustering is a process control environment with a number of production lines, each having a pair of servers (one primary and one standby).
With Clustering, one centralised server would act as standby for all production lines servers.
This means Clustering retains redundancy without the need for standby servers on each line or machine.
The traditional application of Clustering is in combining sites or systems.
By creating a single unified list of alarms across systems and a single view of trends across systems, the operator is able to act on any incidents or exceptions across systems.
The challenge here is when there are duplicate tag, trend or event names across systems that need to be combined.
That is when the degree of customisation increases.
Clustering can also be used to split a system or systems to create reliable sub-systems or sub-clusters maintained through a centralised set of servers.
This approach could be used when the need is to increase overall system capacity, spread system load and still ensure that system functionality is close-to-process.
What it also does is it raises reliability levels by guaranteeing access to alarms, trends, reports or tags at each site/location.
With a Clustering approach, organisations also have the ability to utilise the same configuration for a project multiple times and have the configuration automatically duplicate for each cluster.
This ensures simpler and faster scaling up of systems.
It also means that once one project has been tested, duplication of this project ensures roll-out of any number of systems without having to test each of those duplicate systems.
In terms of operator interface, this also means that the operator would then be able to see one display page on-screen driven by different clusters at different times based on the operator's command.
In all of these applications the key is for potential users to understand how best to quantify the potential benefits - not just from financial savings, but also from the hard-to-quantify benefits of improving centralisation without compromising localisation of process control. Request a free brochure from Citect ...
• Citect: contact details and other news
• Email this article to a colleague
• Register for the free Processingtalk email newsletter
• Processingtalk Home Page
Search the Pro-Talk network of sites
