PLC

Introduction In industrial automation, safety and process control are managed by distinct systems designed for different purposes: the Distributed Control System (DCS) and the Safety Instrumented System (SIS). Understanding whether safety interlocks can be implemented through DCS requires a deep dive into their fundamental differences, capabilities, and safety standards. 1. Distinction Between DCS and SIS […]

Introduction In petrochemical production processes, the Safety Instrumented System (SIS) interlock logic is a crucial safety measure ensuring the safe operation of industrial processes. Various SIS interlock configurations, such as 1-out-of-1 (1oo1), 2-out-of-2 (2oo2), 2-out-of-1 (2oo1), and 3-out-of-2 (3oo2), are commonly used. Recently, a new configuration, 4-out-of-4 (4oo4), has been proposed. This article explores the

In a recent industrial installation, the reboilers of a distillation column were configured to use steam pressure control. However, concerns were raised regarding the stability of incoming steam pressure, leading to the suggestion of switching to flow control. This proposal included the addition of a steam flowmeter and updating the control scheme. Since this involves

In the realm of industrial automation and control systems, two key components often come into focus: SCADA (Supervisory Control and Data Acquisition) and HMI (Human-Machine Interface). While these systems are interconnected and sometimes overlap in functionality, they serve distinct purposes within industrial operations. Understanding their differences is essential for implementing efficient and effective control systems.

Introduction An Emergency Stop (E-Stop) is a critical safety mechanism in programmable logic controller (PLC) systems. It halts ongoing actions by disconnecting the control circuit via relays or contactors. E-Stops are indispensable in industrial automation, ensuring equipment and personnel safety during emergencies. This article explores the concept, application, and best practices of using E-Stops in

The 8/16mA two-wire output system is a specific method for transmitting signals in industrial automation, commonly employed in sensors and transmitters to relay measurement data to control systems or display devices. This system is valued for its simplicity, reliability, and efficiency. Below, we’ll delve deeper into its technical aspects, working principles, advantages, applications, and distinctions

Introduction In most industrial plants, numerous control loops are already in place before the implementation of advanced control projects. Some of these loops operate efficiently, others require occasional manual intervention, and a few cannot be switched to automatic mode. It is crucial to optimize these loops—including PID parameter tuning and plan refinement—but not all loops

With the rapid advancements in automation technologies, many have begun questioning whether Human-Machine Interfaces (HMIs) will remain relevant in the future. While automation and artificial intelligence are reducing the need for human intervention, HMIs are still crucial for many reasons. This article explores the evolving role of HMIs in the automation industry and examines their

1. Introduction to STS (Static Transfer Switch) A Static Transfer Switch (STS) is an advanced electronic switch used in Uninterruptible Power Supply (UPS) systems to ensure seamless and reliable power transfer between two independent power sources. Built with semiconductor devices such as Silicon-Controlled Rectifiers (SCRs) or Insulated-Gate Bipolar Transistors (IGBTs), STS can switch power sources

Before performing a shutdown of a Distributed Control System (DCS), it is essential to conduct a thorough inspection to ensure a smooth and risk-free process. Below is a detailed checklist for pre-shutdown inspection: 1. Data Backup Purpose: To prevent data loss and ensure quick recovery in case of system failure after the shutdown. Verify that