Category: Internet of Things

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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What’s the Difference Between Single- and Multi-Turn Encoders?

The position of a shaft within a machine can affect several concerns including safety, quality, volume and other variables.  To monitor and control information that can be obtained from the shaft position and rotation, encoders were devised to measure and control the data and motion of the machine along the shaft. There are two types…

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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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Hardware Comparison: MicroLogix 1500 Selection Guide

Like the other entrants in the MicroLogix series, the MicroLogix 1500 is small and can be expanded to fit a wide range of control and communication requirements. The MicroLogix 1500 uses RSLogix 500 software and can be edited online using EtherNet/IP. The 1500 is also expandable to 512 I/O points and is the most powerful in the MicroLogix family in terms of capabilities.

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