Tag: UDT

Advanced PLC Training using Industrial Equipment

I just got back from teaching a class in California using the conveyor and training demo mentioned in my previous post on Automation NTH. I have discussed training quite a bit on this blog before, but I feel like this

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Advantages of Re-Usable Code

Recently I’ve seen some good discussions on PLCs (Programmable Logic Controllers) vs. PACs (Programmable Automation Controllers), and it got me thinking about what really differentiates the two. Some have said that it is having a more powerful processor, or more

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Posted in PLCs, Software & Programming Tagged with: , , , , ,

Tag Structures and Dotfields

Today’s post is in response to an e-mail I received asking for my thoughts on Tag Structure. In part, George Steel wrote: Great site, thanks for all your efforts. I am working on positioning my org to move from RS500

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Posted in Controls Design, Documentation, Software & Programming Tagged with: , , , , , , ,

Fieldservers and Protocol Converters

Today’s topic derives from a project I have become involved in in my “spare” time. Lately I have been spending a lot more time teaching classes. My project in Miami is mostly complete, so I have been able to get

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Posted in Communications, Integration, Vendors and Manufacturers Tagged with: , , , , , , , , , ,

Allen-Bradley PLCs

Most readers of this blog know that I go out of my way to be non-brand-specific and unbiased in my presentation of automation topics. So far I have refused to place advertisements for any manufacturer’s on this site, though I

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Posted in Controllers, PLCs, Software & Programming, Vendors and Manufacturers Tagged with: , , , , , , , , , , , , ,

Ladder Logic 302: Data Tracking and Structure Data Type

Today’s post is the second “advanced” topic I have covered on PLC ladder logic, The first being toggle circuits. It is often necessary to track data on individual parts through a machine or production line. If using devices like barcode/datamatrix

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