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Entries for the 'Allen Bradley PLC' Category

Rockwell FactoryTalk Studio Basics: Global Objects and Tag Substitution

Global Objects in Rockwell Automation / Allen-Bradley's FactoryTalk HMI development environment are useful to bring modularization and efficient repeatability of common elements in your project. This basic feature has been around for a long time,...


Connecting to a Legacy AB PLC-5

Sometimes the scariest part of working with legacy hardware is connecting to it with your laptop. This blog will lead you through an easy way to connect one such legacy PLC built by Allen Bradley, the PLC-5 series. Look here if trying to connect...


Hitting the Ground Running…to China

As we enter the Christmas season, I can’t help but think back to this time last year. I was less than three months away from graduating college and faced with a big decision. It was only a few days before Christmas Eve, that I decided to start ...


Source Code Protection in Studio 5000 Logix Designer

While working with a customer on a recent RSLogix 5000 project (now called Studio 5000), there was a need to protect some proprietary source code. In this particular case, DMC had developed a custom Add-On Instruction (AOI) to be used within the proj...


Getting Young Kids Interested in Technology

I'm always trying to get my daughters, ages 8 & 5, interested in what we do here at DMC. It's a challenge because I have a hard enough time explaining what DMC does to someone I meet at a cocktail party, never mind a couple of young kids....


Object Oriented Programming in Siemens and Allen Bradley PLCs

Since their conception PLC programs have been founded on simple programs. RLL (Relay Ladder Logic) and IL (Instruction List) commands have dominated PLC programs since PLCs first came to market in the 1970s. However in the past few years automation r...


PLC Analog IO Troubleshooting Tips

When commissioning or troubleshooting PLC inputs and outputs (IO), the analog signals are often the most difficult. First, analog IO almost always has to be scaled to convert the raw signal to useful process values. Also, there are many wiring and ex...


Remote Machine Monitoring–Connecting to a Modbus Network with Java and Jamod

For a recent project, I had an interesting challenge. It involved a (relatively) simple control system, with an Allen Bradley MicroLogix PLC, and 30 or so inputs and outputs. The challenge was that the customer wanted to be able to access (and potent...


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