Fieldbus & Industrial Networking


Trouble-free plant operation

March 2011 Fieldbus & Industrial Networking

Control loops and advanced control applications across all layers of a plant often depend on the proper functioning of each other for successful process operation. Unavoidably, the performance of these control assets deteriorates over time, and identifying the cause among the vast army of possibilities is key for trouble free plant functionality.

When things go wrong, the first problem is to identify faulty instrumentation and poorly performing loops. This can become overwhelming on large plants, since the more control loops there are, the less the capacity to monitor them individually and the less time there is available to investigate and solve the problems. Without the proper tools, this can be like trying to find a needle in a haystack.

To help, Matrikon offers an effective monitoring tool that readily diagnoses control problems and can provide detailed on-line reports for every loop tested. It can also be used to affect loop tuning. This technology is the result of extensive industrial experience combined with focused university research.

The cause of poor loop performance is often due to cycling, response speeds, valves sticking, inappropriate proportional band, over/under tuned loop, controller design, interaction with other loops, defective instrumentation and hysteresis. The problem is identifying which one, and this requires investigation. The Matrikon tool pinpoints the cause using its one- screen-all-loops reporting system called Tree-Map coupled with a detailed tabular drill down report.

Tree-Map shows on one screen all the bad loops using a colour code and a proportional box sizing system in order to attract operator attention. The detailed reports display control loop performance analysis for easy interpretation, while also providing remedial action guidelines. Once the causes of poorly performing loops have been identified, users can then optimise and tune multiple loops simultaneously for best possible plant operation.

For more information contact Emmanuel Nsenda, Moore Process Controls, +27 (0)11 466 1673, emmanueln@moore.co.za, www.moore.co.za



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

EtherCAT interoperability removes industrial networking barriers
Fieldbus & Industrial Networking
Selecting the right communication technology is one of the most important decisions engineers make, and interoperability helps with that decision. Key development tools and standards ensure interoperability among many EtherCAT devices and manufacturers.

Read more...
Condition monitoring to go
Turck Banner Southern Africa Fieldbus & Industrial Networking
Anyone who wants to efficiently monitor the climate in control cabinets will find a comprehensive range of control cabinet monitors for the DIN rail in Turck Banner’s cabinet condition monitoring family.

Read more...
Data-driven battery production
Turck Banner Southern Africa Fieldbus & Industrial Networking
The availability of high-performance batteries at moderate prices is one of the most important factors for the success of electromobility. As a long-standing automation partner to the automotive industry, Turck Banner supports the major battery manufacturers with its know-how.

Read more...
Bring critical temperature data to your condition monitoring system
Turck Banner Southern Africa Fieldbus & Industrial Networking
Data conversion just got easier. Turck Banner converters are compact, simple add-ons that seamlessly fit into your factory applications. You can take various types of signals such as discrete, analogue and many others, and convert them to protocols like IO-link, PICK-IQ, PWM/PFM, and Modbus.

Read more...
Case History 190: Measurement problem ruins level control.
Michael Brown Control Engineering Editor's Choice Fieldbus & Industrial Networking
The widely held belief in many plants that tuning will solve all base layer control problems is completely fallacious. Bad tuning is generally not the main reason for loops to perform badly. It is important when performing optimisation that all elements in a loop are considered, in addition to the control strategy, before even thinking of tuning.

Read more...
Precise part machining
Beckhoff Automation Editor's Choice Fieldbus & Industrial Networking
toolcraft manufactures on behalf of its customers using its 60 CNC machines, and designs, plans and builds turnkey production systems for companies in various industries, having added injection moulding, mould making and additive manufacturing technologies along the way. Robotics is the company’s newest technology division. This is why toolcraft relies on PC-based control, including in the production cells, which have seven-axis milling robots for machining components at CNC level.

Read more...
Fully digital vertical roller mills
Loesche South Africa Fieldbus & Industrial Networking
Vertical roller mills are found in mining and cement milling operations worldwide. They require complex technology for their operation. As a leader in this field, LOESCHE has proven software solutions for digitalisation that can optimise each piece of milling equipment for energy efficiency, and increase its availability and output, making the plant easy to operate.

Read more...
CNC cycle package for triple-axis milling and drilling
Beckhoff Automation Fieldbus & Industrial Networking
Beckhoff provides a comprehensive package of different cycles for triple-axis milling and drilling machines with the TwinCAT 3 CNC milling base.

Read more...
Precise machining of small parts
Beckhoff Automation Fieldbus & Industrial Networking
Producing large parts with precision is not easy. But how do you produce the smallest components, such as gears and screws for the watch industry or contact pins for connectors, with micron-level accuracy and in large quantities? Swiss companies Esco and Affolter achieve this feat in their CNC machines with TwinCAT CNC and servo drive technology from Beckhoff.

Read more...
Making network connection easy
Conical Technologies Fieldbus & Industrial Networking
PLANET ICG-2510W-LTE is a reliable, secure and high-bandwidth industrial-grade cellular gateway for demanding mobile communications applications, machine-to-machine (M2M), and IoT deployments.

Read more...