PLC

In many industrial applications, various non-electrical physical quantities such as temperature, humidity, pressure, speed, and angle need to be measured. A transmitter is the primary device used to convert these physical quantities into electrical signals for monitoring and control purposes. The most widely used method in industry to transmit analog signals is via a 4-20mA […]

In industrial applications, ensuring the stability and reliability of power supply to critical equipment is paramount. A Variable Frequency Drive (VFD) is one such crucial piece of equipment that controls the speed of electric motors by varying the frequency of the power supplied to them. The addition of an Uninterruptible Power Supply (UPS) in a

Introduction In the first half of this year, we implemented significant improvements in the sulfuric acid plant’s DCS (Distributed Control System). By optimizing control processes, we reduced operational events and alarms by over 90%. While this achievement is exciting, what inspires us even more is the innovative problem-solving applied within the DCS to achieve this

In control theory, the PID (Proportional-Integral-Derivative) controller is often considered the simplest and most effective control algorithm. For systems with a strong, single-variable cause-and-effect relationship, PID is not only straightforward but also highly efficient. The tuning of PID parameters is an essential skill for control engineers, and it remains the foundational knowledge for designing control

Introduction In a certain workshop, a PLC (Programmable Logic Controller) device, which had been running stably for some time, started experiencing frequent output failures. This malfunction caused the control of solenoid valves to fail, leading to a complete halt of the production line. Initially, maintenance electricians struggled to address the issue, unable to find a

Even if you don’t have in-depth knowledge of PLCs, you can still perform initial troubleshooting and maintenance by following these steps. However, for more complex issues, it’s recommended to consult a professional technician. 1. Initial Inspection Power Supply Check: Ensure the PLC power supply is functioning correctly. Check if the power indicator light is on.

Safety Instrumented Systems (SIS) play a critical role in ensuring the safety and reliability of industrial processes, particularly in high-risk sectors such as oil and gas, chemical manufacturing, power generation, and nuclear energy. SIS is a crucial layer of protection that automatically intervenes when abnormal or hazardous conditions are detected, mitigating risks to people, equipment,

Introduction Nested control loops refer to scenarios where the activation of one control loop depends on another. In industrial process control, achieving specific operational objectives often requires the coordinated functioning of multiple control loops. Proper tuning of these loops must follow a defined sequence to ensure optimal performance. Establishing order through sequence is crucial—generally, the

Advanced control is often considered a more sophisticated control algorithm compared to PID (Proportional-Integral-Derivative) control. However, the successful implementation of advanced control projects still relies on robust underlying PID control. For single-variable, strong-causality control problems, advanced control does not necessarily surpass PID control. While advanced control is known for solving complex multivariable coordination and optimization

In industrial automation, the design of instrumentation and control systems relies heavily on the proper configuration of sensors, switching signals, and actuators. Among the commonly used interface types, PNP signal output and relay output are two prevalent options. This article will explore the differences between PNP and relay outputs in terms of their definition, working