November/December 2010

your letters | Readers Respond

"Unraveling PAC" continued

Mitsubishi Electric was not included in the InTech Web Exclusive feature, "Unraveling PAC," ( which was an oversight. In the article, each vendor provided their definition of a PAC and an example of a product that meets the definition. Mitsubishi Electric's information is provided here and now included in the complete online story.

Mitsubishi Electric

The term PAC refers to a manufacturing platform. Mitsubishi Electric offers a PAC Manufacturing Platform that supports all control disciplines such as Sequence, Motion, Robot, CNC, and PC. Customers can pick and choose the best control disciplines for each application while leveraging the same software, I/O, communication interfaces, power supplies, and backplanes. The backplane of a PAC should have a direct connection for the HMI without the need of additional network components. Finally, a PAC has to have the ability to connect directly to the information technology (IT) assets without leveraging middleware like OPC/visualization software and gateway computers. Any PAC that doesn't provide this flexibility is really nothing more than a legacy PLC or motion controller with a couple of new features. Superior performance, improved maintainability and significant cost savings are all realized by PAC Manufacturing Platforms from Mitsubishi Electric.


Sloan Zupan, Product Marketing Manager, Mitsubishi Electric

Not enough people

I would like to applaud InTech on Bill Lydon's "Talk to Me" column in the July/August issue. You raise a point: "A growing concern of mine is that top management at many large companies do not understand the basics of operations and technology of there business." I and a group of my colleagues agree with your point.

I have concerns with the bare bones staffing levels many companies operate with these days. Not enough people to effectively operate and properly maintain industrial sites.

Greg M.