Entries for the 'Allen Bradley PLC' Category

Jason Mayes

03/03/2014

3 Comments

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...

Frank Riordan

01/03/2013

0 Comments

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....

Jon Carson

03/15/2010

2 Comments

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...

Nick Shea

03/10/2010

3 Comments

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...

Jon Carson

07/31/2009

20 Comments

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...