In the world of industrial automation, Programmable Logic Controllers (PLCs) play a vital role in managing real-time operations. One of the most essential yet often overlooked aspects of PLC operation is the scan cycle. Understanding how the PLC scan cycle works can help engineers optimize system performance and ensure reliable, predictable control. 🔄 What Is […]
Understanding PLC Scan Cycles in Industrial Automation Read More »
1. Safety Measures and Preparations 1.1 Basic Safety Requirements Process Isolation & Power-Off: Disconnect power and signal loop (e.g., DCS) before maintenance. Explosion-Proof Precautions: Use explosion-proof tools in hazardous zones; never open housing when powered. Personal Protective Equipment (PPE): Use insulating gloves, anti-scalding gear, and chemical-resistant suits when needed. 1.2 Tools and Documentation Checklist Item
Maintenance Guidelines for Integrated Temperature Transmitters Read More »
1. Pre-Maintenance Preparation 1.1 Safety Authorization and Site Control Operational Coordination:Coordinate with the process control department to obtain written work permits and clearly define operational adjustments during maintenance. Ensure that maintenance work does not affect safe system operation. Confined Space Entry (CSE) Preparation:For meters installed underground, open the manhole cover and ventilate the space for
Maintenance Guidelines for Electromagnetic Flow Meters Read More »
Pneumatic systems are widely used in various industries for automation and process control due to their reliability, simplicity, and efficiency. To ensure the optimal performance of these systems, it’s important to condition the air used to drive pneumatic actuators and other devices. This is where FRL units (Filter-Regulator-Lubricator) come into play. The two most common
The Difference Between Pneumatic FRL Units: Two-Stage (Duplex) vs. Three-Stage (Triplex) Read More »
Introduction: In the sand production process, monitoring material levels is critical to ensure the smooth operation of equipment. However, sand-making machines often face harsh conditions, particularly due to high dust content. These conditions frequently lead to malfunctions in domestically produced paddle-type level switches, as sand and dust enter the internal components of the device, accelerating
Analysis of the Advantages of Paddle-type Level Switches in Sand Making Machines Read More »
During the operation of transmitters, zero drift and temperature drift are common issues that affect their measurement accuracy. But what exactly causes these drifts, and how can they be addressed? Let’s explore. Causes of Zero Drift and Temperature Drift in Transmitters Intrinsic Component Asymmetry: The components used in the transmitter’s bridge circuit may have inherent
Zero Drift and Temperature Drift in Transmitters: Causes and Solutions Read More »
In programmable logic controller (PLC) applications, discrete logic control refers to the processing of binary signals—on/off, true/false—based on specific logical relationships. This document outlines three commonly used programming approaches: Basic Logic Design, Advanced Logic Design, and Engineering Design Methods. 1. Basic Logic Design Method The basic logic design method uses simple logic operations (AND, OR,
Programming Methods for Discrete Logic Control in PLC Systems Read More »
1. Introduction Radar level transmitters have become increasingly popular in industrial measurement due to their non-contact nature and adaptability to various conditions. While ultrasonic sensors are also common, radar devices dominate in versatility and reliability across open tanks, sealed vessels, and diverse materials like liquids, slurries, and solids. However, with the market flooded with radar
In automatic control systems, achieving bumpless transfer is crucial. Bumpless transfer refers to the ability to switch between manual and automatic modes without introducing any disturbances into the process. Typically, switching from automatic to manual mode is straightforward. However, switching from manual to automatic mode is more complex and demands careful design. 1. Bumpless Transfer
Tracking Mechanisms in Automatic Control Systems for Bumpless Transfer Read More »
Question: Should a differential pressure level transmitter be drained while in operation? Answer: Generally, it is not recommended to drain a differential pressure level transmitter while it is in operation. However, if drainage is necessary, follow the steps below: Disable Automatic Water Level Control: First, disengage the automatic water level control and switch to manual
Operational Procedures for Draining a Differential Pressure Level Transmitter Read More »
