What process control applications are OK for wireless?

When can a process application eliminate the cable and use open source radio technology? See how wireless can be applied today, and glimpse solutions coming in 2009.

08/07/2008


When can a process application eliminate the cable and use open source radio technology?

When should you go wireless? Examples

-Obstacles between the control room and storage location;
-Need to reduce or end control sequences;
-Provide a better overview of the plant state; and
-Flexible reporting for short production runs.

Pepperl+Fuchs , Twinsburg, OH, say that use of wireless technologies will expand as options expand beyond proprietary wireless solutions, allowing easier integration and eliminating
They explain that wireless implementations should
-Level measurements in logistics companies previously undertaken manually, such as for storage of intermediate products, in which the wired solution is either not possible or uneconomical due to obstacles between the control room and the storage location.
-Environment monitoring, such as corrosion measurement using online corrosion monitoring instruments at important measuring positions, while eliminating the wiring requirement.
-Monitoring of operating elements actuated manually in the field, such as ball valves, to reduce or eliminate control sequences and to provide a better overview of the plant state.

WirelessHART Network offers transmission security, says Pepperl+Fuchs.

A WirelessHART Network offers transmission security through alternative and redundant transmission paths, says Pepperl+Fuchs.

-Quality assurance through the cyclic measurement and direct transfer to a database (bypassing the control system) of quality-relevant parameters not relevant to the process control system.
-Process optimization and fault tracing due to temporarily installed wireless measuring devices, which measure secondary process parameters.
-Process control in plants, which are only installed and operated for short periods for the production of intermediate products. This saves the expense of wiring that would be required for each plant revision.
In these applications, wireless technology improves information on plant status, material flow and process sequence. It provides a basis for sequence and process optimization, asset management, and decisions relating to preventive maintenance. Wireless technology improves the economy of process plants.
Industrial wireless compatibility among field devices of various manufacturers was not available until the HART Communication Foundation’s WirelessHART standard was released in September 2007. It. For the physical layer, WirelessHART uses radio modules in accordance with IEEE 802.15.4. Radio systems already are established on the basis of this standard, such as ZigBee and WLAN. Hardware already is available. However, according to Lohmann and Schoskerto, "simply refer to WirelessHART as WLANis an oversimplification." 

Pepperl+Fuchs plans to offer WirelessHART adapters for field devices.

Pepperl+Fuchs plans to offer WirelessHART adapters for field devices.


HCF explains how WirelessHART works .
By early 2009, Pepperl+Fuchs expects to have aeldbus.) 
By early 2009, Pepperl+Fuchs also expects to offer the following:
-A WirelessHART Adapter that forms the other end of the communication path. Existing field devices can be equipped with this adapter. Three versions are planned.
-Loop-fed adapters that are simply looped into an existing loop where they extract the energy for operation. The existing wiring is used for the conventional 4-20 mA signal transfer; HART is sent wirelessly via the adapter. Above all, this is an alternative to render the HART capability in the field devices of the installed base usable with low risk, say Lohmann and Schoskerto.
-Battery-powered adapters supply the field device by means of a battery. At selectable intervals, the field device is “awakened,” the measured value is interrogated, and the field device switches off. Autonomous measuring stations are possible. Depending on time intervals,
-An externally powered version that obtains energy for the field device and the adapter. In many cases an externally powered connection is available in the field, for example to supply pumps and valves. If no field device is connected, then this version also can serve as a router, to make the wireless network denser or to bridge a greater distance.
Learn from .
– Edited by Mark T. Hoske , editor in chief
Control Engineering System Integration eNewsletter
Register here and scroll down to select your choice of eNewsletters free .





No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2013 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Leaders Under 40 program features outstanding young people who are making a difference in manufacturing. View the 2013 Leaders here.
The new control room: It's got all the bells and whistles - and alarms, too; Remote maintenance; Specifying VFDs
2014 forecast issue: To serve and to manufacture - Veterans will bring skill and discipline to the plant floor if we can find a way to get them there.
2013 Top Plant: Lincoln Electric Company, Cleveland, Ohio
Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Plant 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.

Bring focus to PLC programming: 5 things to avoid in putting your system together; Managing the DCS upgrade; PLM upgrade: a step-by-step approach
Balancing the bagging triangle; PID tuning improves process efficiency; Standardizing control room HMIs
Commissioning electrical systems in mission critical facilities; Anticipating the Smart Grid; Mitigating arc flash hazards in medium-voltage switchgear; Comparing generator sizing software

Annual Salary Survey

Participate in the 2013 Salary Survey

In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.

Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.

2012 Salary Survey Analysis

2012 Salary Survey Results

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.