Batch control: What do you mean?

Practitioners of control engineering generally like things spelled out when they can get it, and those revising the ISA batch control standard believe their three-year revision clarifies quite a bit. And, they say, the standard continues to become more usable for applications outside of batch control.

11/01/2009


Practitioners of control engineering generally like things spelled out when they can get it, and those revising the ISA batch control standard believe their three-year revision clarifies quite a bit. And, they say, the standard continues to become more usable for applications outside of batch control.

ISA88.01 Batch Control Part 1: Models and Terminology, originally passed in 1995, started revision mid-2006, went out for vote last month, and may be final by early 2010. Clarifications addressed drafting errors in the original standard and less-than-specific wording that left too much to interpretation. Discussions revisited the standard’s original intent, and what it’s come to mean, as new technologies developed and were applied, bringing life to ISA88 concepts.

No academic exercise, the debate reflected a microcosm of real-world circumstances and incorporated input from industries outside batch control. Users, system integrators, and vendors augment efficiency by integrating batch control with continuous control and discrete control. Real lifecycle savings result, as high as 50% by some estimates. When systems are based on standards and integrate in a standard way, they can be more easily modified, upgraded, and replaced. Using a standard such as ISA88 avoids creation of a block of impenetrable automation, nearly impossible to maintain or adapt. Manufacturing needs flexibility, scalability, and adaptability, and the enhanced ISA88 concepts can help provide that.

ISA88 creates models and common terms, in four parts approved by ANSI/ISA and IEC, to understand the real world of controls, equipment, processes, and information management. Standard designs can be changed more quickly and easily. Since engineering can be creative as everyone seeks a better way, the trick is to be flexible enough in the models to allow upgrades, and even integration of adjacent dissimilar systems, with less effort.

There’s still room for creativity. Standards rarely guarantee interoperability, as anyone trying to get one vendor’s ISA88-based software to work with other software well knows. Still, this ISA88 Part 1 update narrows the latitude for interpretation and has a compliance clause to help create greater efficiencies.





No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
Each year, a panel of Control Engineering editors and industry expert judges select the System Integrator of the Year Award winners.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Learn how to create value with re-use; gain productivity with lean automation and connectivity, and optimize panel design and construction.
Go deep: Automation tackles offshore oil challenges; Ethernet advice; Wireless robotics; Product exclusives; Digital edition exclusives
Lost in the gray scale? How to get effective HMIs; Best practices: Integrate old and new wireless systems; Smart software, networks; Service provider certifications
Fixing PID: Part 2: Tweaking controller strategy; Machine safety networks; Salary survey and career advice; Smart I/O architecture; Product exclusives
The Ask Control Engineering blog covers all aspects of automation, including motors, drives, sensors, motion control, machine control, and embedded systems.
Look at the basics of industrial wireless technologies, wireless concepts, wireless standards, and wireless best practices with Daniel E. Capano of Diversified Technical Services Inc.
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
This is a blog from the trenches – written by engineers who are implementing and upgrading control systems every day across every industry.
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Control Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.