To the untrained eye, wiring a motor to an AC drive, more commonly known as a variable frequency drive, may seem like a simple job of plugging the motor in and routing the wiring to make it look clean. The length of the wires might not even be a concern, because in an ideal world with ideal resistance, it wouldn’t. The problem is that we live in a less-than-ideal world, and the rules of physics are nonnegotiable. Whether it’s traces on a PCB or wires during a motor install, the longer the connection point, the higher the resistance, heat buildup, and voltage drop. This matters more than you might expect when it comes to installing AC drives. Before getting into it, if you would like to familiarize yourself with how an AC drive works, check out this article here ! The inherent design of an AC drive is to output fast voltage pulses rather than a clean sine wave. Each time the AC drive switches, a voltage pulse travels down the motor cable to the motor. With a shorter cable, the pulse...
Choosing the right PLC is one of the most important decisions in an automation or infrastructure project. A well-designed PLC can help minimize commissioning time, reduce stability problems during long-term operation, and lower maintenance costs. In energy-intensive applications, PLCs do more than handle basic logic. They may also support energy optimization, multi-VFD coordination, system monitoring, and long-term lifecycle reliability. The system requirements should drive the PLC selection, not the brand name alone. Start by determining how many I/O points the application requires. A small machine may only need a few dozen I/O points, while a tunnel, pump station, or utility system may require hundreds or thousands across ventilation, drainage, lighting, monitoring, and safety-related equipment. In larger systems, distributed I/O, expansion capacity, remote communication, and reliable backplane or network performance become major selection factors. For applications tied into utility...
The question of whether to replace the row of pushbuttons and selector switches on the HMI eventually arises on practically every classic machine or control panel. One touchscreen rather than twenty separate devices seems like a straightforward surface-level alternative. The engineering response is far more complex. The way the operator interface is wired, how PLC logic processes inputs, how data is logged, and how alerts are displayed are some of the key changes. Everything else that comes into contact with the hardwired safety circuit must remain unchanged. The difference between a clean migration and one that results in unexplained PLC logic rewrites, or safety compliance problems mid-commissioning, is to formally distinguish between these two groups before the project begins. Before discussing what changes, it helps to be precise about what a pushbutton panel is doing at the wire level. Each pushbutton, start, stop, jog, and mode select wires a physical contact directly to a PLC...
Conveyor systems serve as crucial circulatory networks in warehouses, airports, mining operations, food processing plants, and manufacturing industries. Well-designed conveyors drastically reduce manual material handling while improving operational efficiency and ensuring consistent output quality. Allen-Bradley PowerFlex drives are essential components of modern conveyor systems, whose performance relies heavily on precise control of the connected motors. PowerFlex drives utilize advanced control modes, including Sensorless Vector Control (SVC), Volts/Hertz (V/Hz), and TotalFORCE technology (available on the PowerFlex 755T series), to deliver high-precision regulation of motor speed and torque. This highly precise motor control enables smooth acceleration and deceleration of conveyor systems, significantly reducing wear and tear on conveyor belts, gearboxes, and bearings by minimizing mechanical shock. Selecting the correct PowerFlex drive helps minimize system downtime, enhance...
Choosing the right PanelView HMI is no easy task; it’s not just about the screen size or the communication protocol. A major choice is whether a PanelView terminal will be equipped with a keypad, a touchscreen, or both. PanelView models with a keypad enable a variety of functions under harsh operating conditions that touchscreen interfaces cannot. By understanding the true costs and benefits of these input methods, engineers, operators, and maintenance personnel can select the most appropriate PanelView solution for their application. Modern PanelView families vary widely in the input options available. PanelView 5310 and 5510 terminals use touchscreen input, while PanelView 800 and legacy PanelView Plus 6 models include keypad, touchscreen, or keypad/touchscreen options depending on the model. PanelView Plus 7 Standard terminals are primarily touchscreen-based. The choice of interface affects the operator’s efficiency, navigation speed, maintenance requirements, system reliability...
A graphic terminal remains an invaluable asset within most automated systems. It gives operators a practical way to see what a machine is doing, respond to alarms, adjust process values, and keep production moving without needing to dig through the control cabinet every time something changes. Of course, the effectiveness of the terminal varies depending on factors such as screen size, graphic design, responsiveness, and so on. Because of this, it can get a bit overwhelming trying to spec the perfect HMI for your setup. Today, we’re here to narrow down your search with two popular offerings on the market: The Mitsubishi GOT2000 series and the Allen-Bradley PanelView 5500 series. Both of which are built for a serious industrial environment, yet lean into their own strengths that we will go over to help you make a more informed decision. Before diving into the comparisons, it’s best to go over what each HMI’s family is trying to accomplish. While the Mitsubishi GOT2000 and the...
The PowerFlex product family from Rockwell Automation spans one of the broadest drive portfolios in industrial automation. Engineering the right selection from within that portfolio requires understanding precisely where Rockwell draws the line between its compact and full-size (architecture-class) drive categories, and what technical capabilities exist on each side of that line. PowerFlex drives are broadly categorized into compact-class and architecture-class: compact drives are smaller, cost-effective units for simpler applications, while architecture-class drives are high-performance, feature-rich units for demanding industrial requirements. Here, we will discuss some parameters for comparing the two types of drives. Source PowerFlex 755 Drives Here Rockwell Automation organizes the PowerFlex family into three tiers: compact (component-class), standard, and architecture-class. The compact tier encompasses the PowerFlex 4 , 40 , 523 , 525 , and 527 series. The architecture-class...
An AC drive is basically a device that lets you control how fast and how hard an AC motor runs. It does so by changing the frequency and voltage of the power supplied to the motor. And knowing the difference between a general-purpose AC Drive and a high-performance AC Drive really matters if you’re into modern industrial automation. General-purpose VFDs are widely used because they handle most industrial tasks. But there are times when you need something more powerful and precise; that’s where high-performance drives step in. If you’re an engineer or have to make purchasing decisions, you need to know how these two stack up before you spend a dime. Shop for Allen-Bradley PowerFlex 525 Drives Here A general-purpose AC Drive is designed to suit a wide range of settings, including factories, businesses, and full-scale industrial environments. They’re flexible, so people tend to use them almost everywhere. Maybe you work somewhere that needs a motor control system that’s ready to scale up...
DC motor systems remain deeply embedded in industrial infrastructure. Steel rolling mills, paper machines, mine hoists, crane drives, and extruders continue to operate on DC drives, where their precise torque-speed controllability justifies retention. Yet these systems carry a well-documented efficiency liability: energy losses distributed across electrical, magnetic, mechanical, and power conversion pathways that compound significantly at partial load. Regardless of the application, even small reductions in DC motor losses can yield significant gains in overall process efficiency, motor life, and cost-effectiveness. Understanding each loss mechanism at the parameter level and matching it to a specific DC drive mitigation strategy is the foundation of any credible energy optimization program in a DC-driven facility. Armature copper loss is the dominant electrical loss in any DC motor system. These losses are proportional to the square of armature current and are expressed as Ia²Ra...
Allen-Bradley CompactLogix and ControlLogix controller platforms play a key role in modern industrial automation. ControlLogix controllers are configurable for safety, standard, Logix SIS, and redundancy applications, facilitating faster system performance, high I/O capacity, enhanced productivity, and improved security for enterprise-level and large-scale automation systems. CompactLogix platforms offer the same core processing capabilities as ControlLogix platforms, but for cost-sensitive, mid-range, or standalone automation applications — often at a fraction of the total ControlLogix investment. Selecting the correct Allen-Bradley controller between the ControlLogix and CompactLogix platforms requires balancing cost, I/O capacity, performance, complexity, and scalability to avoid oversized control panels, redundant programming complexity, and inflated hardware costs. This article explains the technical differences between the two platforms and provides a clear selection criterion...
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...
A bottle of water or a frozen dinner may look simple and unassuming on the outside. You pick it up, toss it into your cart, and go about your day. Yet, behind the scenes lie a choreographed dance of machinery and control systems that cook, pack, and label your next easy meal or bottled beverage. Food and beverage automation comes in many different flavors, from motors to run conveyor lines to robot arms that sort packages to make palletizing easier. Today, we will highlight one of the most important pieces of the system: the PLC, the glue that holds together an industry that relies on consistency, sanitation, uptime, and quality control. The Food and Beverage industry is one of the largest manufacturing sectors in America, accounting for 16.8% of all U.S manufacturing sales and 15.4% of U.S. manufacturing employment as of 2021, according to the USDA. That’s over 1.7 million workers ensuring that the quality of your next meal or drink is as you would expect it to be. On top of that...
Variable frequency drives and programmable controllers have evolved from loosely connected hardware communicating via hardwired I/O to tightly integrated systems that share tag-based data, diagnostic information, and motion commands over a single industrial Ethernet network. The main point of this architecture in Rockwell Automation environments is the ControlLogix platform, and its integration with the PowerFlex drive family defines how modern Allen-Bradley-based control systems handle motor control from simple pump speed regulation to coordinated multi-axis positioning. This article covers the full integration architecture across hardware, communication protocols, Auto-Device Replacement, CIP Motion, and diagnostic practices. Order PowerFlex 755 Drives Here The PowerFlex drive portfolio spans several product lines, each with distinct integration characteristics when paired with ControlLogix. The PowerFlex 525 (catalog 25B series) is a compact drive rated from 0.5 to 30 HP and...
DC drives and servo drives are two distinct types of motor control devices. DC drives are commonly used for steady-speed and torque control, while servo drives are designed for precise, responsive control of position, speed, and torque. If you want to really get what sets them apart, you have to dig into how they work, what motors they run, and the sorts of things they’re actually used for. A DC drive converts incoming AC power into DC, ensuring the motor receives the correct voltage and current. In many cases, the controller and drive are combined, so commands and motor output go hand in hand. Inside, it all comes down to how the drive handles AC. Many traditional DC drives use SCR-based rectifier circuits to convert incoming AC power into a controlled DC output for the motor armature. Smaller drives may use single-phase rectifier designs, while larger industrial DC drives often use three-phase, six-pulse SCR bridges for smoother and higher-power DC output. This is why you will see...
