Category: PLC

PLCs Vs. Microcontrollers – Which Should I Use?

So, can a microcontroller be used in place of a PLC? The answer is in a very narrow set of circumstances, such as straightforward control requirements in a low duty environment, then the answer is yes. However, the differences above highlight that PLCs are designed for industrial and high-volume service applications that require safety, redundancy, ease of programming, and a host of other features that microcontrollers cannot provide.

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Hardware Comparison: MicroLogix 1400 Selection Guide

As the de facto standard for industrial programmable logic controllers, Rockwell Automation’s line of Allen-Bradley PLCs covers the full spectrum of application scales, from hobbyist to multi-site systems.  In this article, we’ll examine one of the most popular and cost-effective PLC options in Allen-Bradley’s catalog: the MicroLogix 1400 family.       MicroLogix Family Overview The MicroLogix…

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A Guide to High-Speed Counters (HSC) used in Programmable Logic Controllers (PLCs)

A high-speed counter (HSC) is a functional capability within particular PLCs. HSCs count the frequency of the pulse of processes from systems with elements such as high-speed encoders.
Counters in PLCs are an obscure but critical part of all PLCs. They can be a software-defined, virtual entity having low-frequency inputs to process. In high-speed input cases, a hardware input module must be designed to ensure the control process’s proper operation to ensure the outputs’ accuracy and timely delivery.

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Hardware Comparison: GE Fanuc Series 90-30 vs the Emerson GE RX3i

The GE Fanuc Series 90-30 has
long been a workhorse PLC for GE automation control systems.
Introduced in 1991, the 90-30 series has been a popular choice for
industrial control professionals because of its versatility and
modularity.
By contrast, the RX3i CPU Programmable Automation Controller by GE
Automation represents the move toward a more comprehensive view of
automation and one that both builds on the foundation laid by the
90-30 series while offering even more advanced features and
versatility.

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Hardware Comparison: Allen-Bradley vs Siemens PLCS

The Allen-Bradley Logix family of controllers is considered the most popular programmable logic controller family in the US.  It consists of numerous variants but for this comparison we will look at the ControlLogix, CompactLogix and MicroLogix PLCs. By comparison, Siemens is much more common in Europe where their extensive line of PLCs are used in…

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