1 What is an Operational Amplifier An operational amplifier (op-amp) is used to regulate and amplify analog signals. An op-amp is an integrated device that contains multiple stages of amplification circuits, as shown in the figure: The left image shows the in-phase configuration, where the Vn terminal is grounded or at a stable level. When … Read more
In the field of industrial automation, continuous physical quantities such as temperature, pressure, and flow need to be transmitted to the PLC throughanalog signals, which are then converted into actual engineering values. This article dissects the essence of conversion from an engineer’s perspective, using examples from mainstream brands like Siemens, Mitsubishi, and Omron, to help … Read more
1. Analog signals can collect physical quantities such as temperature, force, and vacuum; the analog signals can be 0~5V, 0~10V, ±5V, ±10V, 0~20mA, 4~20mA, etc. 2. For analog conversion, taking the Mitsubishi FX5U series PLC as an example, a force sensor with a range of 0 to 200N corresponds to 0~10V (with a corresponding digital … Read more
In industrial sites, various analog sensors such as pressure, displacement, temperature, flow, and speed differ in their design and technical methods. The power distribution methods for sensor operation are mainly divided into two-wire and four-wire systems, and the output analog signals also vary, with common signals being 0-20mA, 4-20mA current signals, and 0-75mV, 0-5V, 1-5V … Read more
Arduino Lesson 6: Digital Signals Rubin said April 21, 2025 11:56 Qinghai 01Analog SignalsAnalog signals: are information expressed by continuously varying physical quantities, also known as continuous signals that have multiple different values within a certain time range.During the transmission process, the information signal is first converted into an electrical signal (hence called “analog”), and … Read more
I remember once visiting a food factory where the owner spent over twenty thousand on a packaging machine. Suddenly, it stopped working! When I opened the electrical cabinet, the indicator lights on the Siemens S7-200 SMART were flashing like it was New Year’s. The operator was as anxious as a cat on a hot tin … Read more
The oscilloscope is the most common instrument for electronic engineers, and many people compare it to the “eyes” of an engineer, which is enough to illustrate how important oscilloscopes are to engineers. How is the signal displayed on the oscilloscope screen? On the oscilloscope, the signal is transmitted through a series of resistors and capacitors … Read more
Introduction In industrial automation, analog signals are an important data type processed by PLCs, commonly found in measurements from sensors such as temperature, pressure, liquid level, and speed. Unlike digital signals that only determine ‘on’ and ‘off’, analog signals can represent continuous values. For example, the output from a temperature sensor may be a voltage … Read more
Basics of PLC Analog Signal Processing: Making Data “Speak” Hello everyone, I am Ouyang. Today, let’s talk about analog signal processing in PLCs. In automation control, analog signals act like the “senses” of devices, helping us accurately perceive and control various physical quantities. Mastering analog signal processing will make your PLC programs more flexible and … Read more