We found 80 posts about Maintenance from DO Supply, a global automation parts
reseller focused on hard-to-find and obsolete industrial automation products.
Mechanical wear in motor-driven systems is inevitable. It usually stems from repeated stress events, such as hard, abrupt stops, frequent cycling, or sudden load changes. These events can be reduced with motor control to minimize wear and tear on your system. This is where AC drives, or variable frequency drives (VFDs), come into play. They are installed for superior motor control, allowing the user to adjust voltage, frequency, torque, and speed to allow for a more efficient system. Learning how to properly do so will pay dividends in a smoother-running system. Direct-on-line (DOL) motor starts are the primary initiator of premature mechanical wear in industrial systems. When a three-phase induction motor is energized without drive control, inrush current reaches 600–800% of full-load rated current within the first 100–200 milliseconds. The resulting electromagnetic torque spike can reach 150–300% of rated torque and is transmitted instantaneously through the shaft, coupling, and...
Allen-Bradley PanelView terminals from Rockwell Automation are core Human-Machine Interface (HMI) solutions for industrial automation. While ideal for climate-controlled industrial settings, cold storage and outdoor deployments present significant extreme environmental challenges, such as sub-zero temperatures and direct UV & solar radiation. Optimizing PanelView terminals for such extreme environmental conditions requires strategic hardware selection (e.g., robust enclosures such as NEMA 4X-rated enclosures), precise thermal management strategies, and comprehensive preventive maintenance practices. This article explores the operational parameters of PanelView terminals deployed in extreme industrial environments. It presents a comparative analysis of specific PanelView terminal models, practical environmental mitigation strategies, and proactive failure-prevention techniques. Standard PanelView terminals are designed to operate within specific temperature ranges (typically 0°C to...
Variable Frequency Drives (VFDs), servo drives, and DC drives are the workhorses of motion control in industrial automation. Their internal semiconductor junctions, IGBTs, power diodes, and electrolytic capacitors, are thermally sensitive. Empirical data from semiconductor reliability models (Arrhenius equation) indicate that a 10°C rise in junction temperature reduces component life by approximately 50%. Conversely, proper thermal management can extend drive life beyond the manufacturer’s 10-year design horizon. This article provides a quantitative framework for cooling and enclosure design specific to drives, focusing on heat load calculation, airflow dynamics, ingress protection (IP) trade-offs, and active versus passive cooling strategies. For engineers responsible for specifying, installing, or maintaining drives, understanding these principles is not optional, it is the difference between a 5-year service life and a 15-year one. To extend drive life, one must first understand...
Industrial control systems built on legacy Modicon PLC platforms continue to operate at the core of production, utilities, and process industries worldwide. Systems based on Modicon 984 , Quantum (140 series), Premium (TSX series), and Momentum platforms remain in active service despite approaching or exceeding their intended lifecycle. While these systems are often stable and well-understood, the challenge is no longer purely operational reliability, but rather long-term sustainability under hardware obsolescence, diminishing vendor support, and shrinking spare parts availability. Many of these systems were engineered for deterministic control and robustness, which explains their longevity, but they were not designed for indefinite lifecycle support in modern industrial environments. Join us today as we go over a technical approach to spare parts management, lifecycle risk mitigation, and long-term support planning for aging Modicon PLC systems. Source Modicon M580 PLCs Here A...
Allen-Bradley is one of the most trusted names in industrial automation worldwide. From manufacturing plants, Building Management Solutions, and oil refineries to water treatment facilities and food processing lines, Allen-Bradley drives and PLCs (Programmable Logic Controllers) power critical infrastructure across virtually every sector of modern industry. Yet even the most reliable industrial systems encounter faults, trip events, and communication errors. When an Allen-Bradley drive trips unexpectedly or a PLC fails to execute logic correctly, production lines can halt within seconds, resulting in lost output and costly downtime. The ability to diagnose and resolve these issues quickly is not just a technical skill; it is an operational necessity. This guide walks through the most common Allen-Bradley drive (focusing on the 525 , 700 , and 750-series ) and PLC (CompactLogix and ControlLogix ) faults encountered in real-world environments. For each issue, you will find an...
Programmable logic controllers process two fundamental categories of field signals: analog inputs and digital inputs. Each signal type has distinct electrical characteristics, wiring requirements, module architecture, and failure behavior. When faults occur on either input type, the diagnostic approach differs significantly. Engineers and technicians who understand the behavior of analog vs. digital input systems are better positioned to identify faults quickly and implement corrections. This article provides a structured technical framework for troubleshooting analog input vs digital input errors in PLC systems. A digital input signal is binary in nature. The field device, such as a pushbutton, proximity sensor, limit switch, or relay contact, produces either a voltage-present or voltage-absent condition. The PLC digital input module interprets this as a logic-1 or logic-0 state. Most digital input modules operate at 24VDC. The module contains optical isolation circuitry that...
The technical and visual interaction between industrial processes and the operators who are working on them is provided by Human Machine Interfaces (HMIs). HMIs are crucial for maintaining productivity and process reliability because they provide real-time data, alerts, help in control, and diagnostics. However, HMIs always face issues that can significantly shorten their service life if they are not protected in harsh industrial environments, such as manufacturing plants, oil and gas facilities, fertilizer plants, mining sites, water-treatment plants, and outdoor installations. Allen‑Bradley PanelView HMIs, commonly used in industrial automation, serve as a solid reference for understanding both the challenges and optimal approaches to HMI safety. PanelView deployments provide valuable insights into how environmental conditions affect HMIs and which design, installation, and maintenance strategies are most effective. This article examines the environmental hazards affecting HMIs...
Over the past two decades, Allen-Bradley MicroLogix controllers have been the backbone of many industrial automation applications. In favor of Compact Logix and Micro800, Rockwell Automation has phased out the MicroLogix product line; however, a large worldwide installed base continues to rely on MicroLogix controllers for daily operations. MicroLogix controllers automate countless OEM (Original Equipment Manufacturer) panels, commercial HVAC (Heating, Ventilation, and Air Conditioning) equipment, packaging lines, agricultural machines, and municipal water systems. The majority of MicroLogix installations are now over a decade old, with most of these controllers having been in continuous operation for 10 to 20 years. As such, to ensure operational continuity and reliability, their regular and effective maintenance is vital and no longer an option. Power fluctuations, component wear and degradation, harsh industrial environments, communication errors, and aging/obsolete electronics...
If you work as a maintenance tech or plant engineer, you know the Allen-Bradley MicroLogix PLC. It’s everywhere in industrial automation, and for good reason; though, even the best equipment needs some care. Troubleshooting and regular maintenance help keep it in working condition. Here’s a guide that cuts through the jargon and turns those official specs into real-world advice you can actually use. The first and by far the most effective ‘line of defense’ against sudden system failures is good old proactive maintenance; after all, a well-maintained MicroLogix controller is just much less ‘likely’ to develop those catastrophic faults that cause so much production loss. All maintenance tasks must be carried out by a qualified technician familiar with the dangers of industrial control systems. Conduct pre-work maintenance when the power of a MicroLogix system is off and disconnected from all sources. Shop for MicroLogix 1000 Series PLCs and Accessories Here! The operating environment...
The PowerFlex 525 drive is a dependable workhorse found in many control panels worldwide. It keeps motors moving at the right speed, delivers the torque that you expect, and plays nicely with Allen-Bradley PLCs or just about any SCADA system you have. Though, like any other VFD, it can be temperamental at times. Though when that happens, it does so through a well-thought-out fault and diagnostic system. Understanding what these faults mean and what to do about them turns occasional alarms from stressful surprises to quick fixes. Today, we are here to help walk you through what the more common faults really mean and how to get your drive back on track. Shop for Allen-Bradley PowerFlex 525 Drives Here First of all, let’s discuss the diagnostic framework of the drive series and how it identifies the problem using specific PowerFlex 525 Fault Codes. • The drive maintains a fault history buffer for up to 10 past faults. The three most recent fault codes are usually grouped and can be read...
The SMC Dialog Plus soft starter is a reliable solution for motor control, but improper configuration or oversight can compromise performance and equipment safety. This article outlines eight common mistakes users make—from incorrect motor FLA settings and misconfigured start modes to overlooked communication parameters and fault code monitoring. Each error is explained in detail, along with actionable guidance to prevent them. Whether you’re commissioning, operating, or maintaining the SMC Dialog Plus, understanding and addressing these mistakes will help you enhance system reliability, extend motor life, and maintain safe, efficient operations in industrial environments. Some of the common mistakes are listed below, along with how you can avoid them from occurring. Shop for SMC Dialog Plus Starters Here One of the most common errors customers make when configuring the SMC Dialog Plus starter is to set the Full Load Amperes (FLA) number incorrectly. This value is essential for the...
No matter the purchase, reliability is often one of the top deciding factors, and when it comes to automation, it’s tied directly to uptime and maintenance costs. When considering an automated process, reliability prevents costly downtime and unexpected repairs. Even a robust motor can break down if it’s subjected to the wrong startup conditions or poorly configured controls. Likewise, many different features and options are meant to prevent damage to the motor and keep it running as smoothly as possible. Some modern drives will even estimate the end of life for your equipment. Today, we will explore the features and options available with modern AC drives, specifically the PowerFlex series by Allen-Bradley, and explain how they help prevent unnecessary motor damage. Overload protection is a fundamental feature in modern drives that helps guard against prolonged overcurrent that can overheat the motor windings. If this overcurrent condition persists for too long, the drive will trip...
Allen-Bradley Drives play a critical role in modern automation by improving efficiency, controlling motor performance, and reducing energy costs. However, like all advanced equipment, they are susceptible to faults if not properly maintained or configured. Common issues range from overvoltage and ground faults to communication errors and thermal derating. Each of these faults can disrupt production, damage equipment, or compromise safety if left unchecked. Fortunately, with the right preventive measures and strict adherence to manufacturer guidelines, most problems can be minimized or avoided entirely. Allen-Bradley drives, widely trusted across industries, provide built-in protections and diagnostic tools, but their effectiveness depends heavily on proper installation, monitoring, and maintenance practices. Let’s take a look at some of the most common issues and how to prevent them from showing up. Shop for Allen-Bradley Drives Here Overvoltage faults typically occur when the DC bus...
For any power system to run smoothly and efficiently, the voltage and current wave forms should ideally be perfect sinusoids. However, in practical applications, power quality problems like voltage dips, transients, fluctuations, and harmonic distortion occur commonly. The imperfections in the waveforms are represented as the presence of harmonics. Harmonics are the distortions caused by non-linear loads consuming currents that are non-sinusoidal. These distortions significantly reduce the power system efficiency and lead to equipment failures and operational disruptions. Harmonics are sinusoidal waveforms with a frequency that is an integer multiple of the base power system frequency (50 or 60 Hz for most practical applications). These harmonic frequencies overlap onto the base waveform and introduce distortion. This distortion is measured as Total Harmonic Distortion (THD). If not dealt with appropriately, harmonics result in overheating, premature equipment degradation, and...
Maintaining and troubleshooting the SMC 2 soft starter is essential for ensuring reliable motor control and maximizing equipment lifespan. This comprehensive guide covers both foundational and advanced diagnostic techniques to help technicians and engineers keep their systems running at peak performance. From interpreting fault codes and verifying configuration settings to analyzing SCR gate signals and evaluating load imbalances, each section provides practical insights and technical depth. Whether you’re performing routine maintenance or addressing complex operational issues, these strategies will help you minimize downtime, enhance safety, and extend the life of your motor control system. Buy SMC 2 Soft Starters Here To help technicians quickly diagnose operational issues, the SMC 2 soft starter displays fault codes. These codes are crucial for identifying issues like overload, phase loss, shorted SCRs, and undervoltage. A motor with an overload fault is consuming too much current...
