Reviewed resource: Modbus for process control and automation

09/05/2007


Modbus is one of the older industrial networking protocols that is still commonly used in process plants. While some regard it as a legacy technology that should be scrapped in favor of more sophisticated fieldbus and Ethernet based platforms, it performs well in many applications, including down to the instrumentation level for remote I/O devices. In a whitepaper available in the Resource Center at www.controleng.com , Moore Industries discusses what Modbus can do today and how to use it in your plant environment.

For a platform that’s almost 30 years old, Modbus has been resilient and adaptable, adding Ethernet and wireless connectivity to increase its versatility. Moore’s paper includes configuration suggestions for individual instruments, for transmitting HART diagnostic data, and for communication between DCSs and analog input modules.

Modbus does not have all the functions of a current fieldbus platform such as Foundation Fieldbus or Profibus PA. By comparison, there are few diagnostic capabilities and no way to send power to individual instruments. On the other hand, it is inexpensive, easy to work with, and there are devices available from a wide variety of manufacturers that support connectivity.

—Peter Welander, process industries editor, PWelander@cfemedia.com , Control Engineering Weekly News





No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
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.
Save energy with automation; Process control system upgrades; Dispelling controll myths; Time-sensitive networking; Control system integration; Road to IANA
Additive manufacturing advancements; Machine vision enhances robotics; Fieldbus evolution; Process safety; Advice from System Integrators of the Year; Road to IANA
Salary and career survey: Benchmarks and advice; Designing controls; Remote data collection, historians; Control valve advances; Hannover Messe; Control Engineering International
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

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

The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
Getting to the bottom of subsea repairs: Older pipelines need more attention, and operators need a repair strategy; OTC preview; Offshore production difficult - and crucial
Digital oilfields: Integrated HMI/SCADA systems enable smarter data acquisition; Real-world impact of simulation; Electric actuator technology prospers in production fields
click me