The industrial sector is heavily reliant on PID controllers for all sorts of automation needs. A control loop is a fundamental feedback mechanism that is put in place to bridge the gap between the measured process variable and the desired set-point. Controllers are used to apply the appropriate corrective efforts through interfaces called actuators that can drive the variable up or down. The controller applies the corrective effort in a loop, until the error is eliminated up to the desired accuracy.
Gordon Moore articulated his all-famous Moore’s Law surrounding computing performance over 50 years ago, and its no less than a wonder that the statement has stood the test of time. The semiconductor industry continues to enhance computing power into more confined spaces at shockingly lower prices, providing consumers with incredible number of benefits.
The Glove Unique Reprocessing Unit (GURU) built by Pentamaster, an automation provider in Malaysia is a perfect case study for observing such advancements in technology. In two of the seven workstations, the GURU system has allowed the company to halve the number of industrial PCs driving the machine-vision modules.
The Process Control Industry is heavily dominated by proportional-integral-derivative (PID) controllers, however even these marvelous components have their own limitations. The behavior of PID loops is difficult to understand, something which gets worse whenever a fault arises, and troubleshooting is required. Nonetheless, technicians & engineers strive to achieve coherence between the three building blocks of the controller, i.e. proportional, integral & derivative actions.
Ladder Logic 102: The Pros and Cons
As we’ve seen in the previous article, Ladder Logic 101, choosing the right tool for your programming job is super important. We took a look at the conception and fundamentals of one of those tools, called ladder logic, and now we will finish the introduction to ladder with an overview of its pros and cons. Understanding what ladder does and doesn’t do best is key to getting the most use out of it, and should it be the programming method you choose to use for your project, you’ll want to know where it really shines.
Ladder Logic 101: The Basics
Anyone who has worked in automation software knows that using the right tool for the job is essential to a successful and worthwhile implementation. Recognizing this, software vendors often allow multiple programming methods to be used with their software. These fundamentally different models of computation let programmers select the most appropriate tool for their tasks, such as ladder logic.