46 articles in this category
AGV vs AMR compared — fixed-path vs autonomous navigation, flexibility, cost, safety, and infrastructure — plus how to choose for your facility.
Analog vs digital signals explained for automation — discrete vs continuous, the common signal types (24V, 4-20mA, 0-10V), and how each maps to PLC I/O.
Arc flash vs arc blast — the thermal hazard vs the pressure/blast hazard of an arcing fault, why both matter, and how to protect against each.
Condition monitoring vs predictive maintenance — how they differ and relate, the maintenance maturity path, and how the control system data layer makes both possible.
Data acquisition system vs data logger compared — sample rate, real-time vs store-and-download, cost, and where a PLC's analog I/O fits, plus how each reaches SCADA.
EtherNet/IP vs PROFINET compared — origins, real-time performance, device support, topology, diagnostics, and the ecosystem that should drive your choice.
HMI vs SCADA explained — what each does, local machine interface vs plant-wide supervision, where they overlap, and how they connect to PLCs.
Ignition Perspective vs Vision compared — architecture, deployment, mobile, performance, and licensing — to help controls engineers pick the right HMI module.
Ignition vs Wonderware/AVEVA compared — licensing model, architecture, historian, HMI, and PLC connectivity — to help controls engineers choose a SCADA platform.
Inductive vs capacitive proximity sensors compared — what each detects (metal vs almost anything), range, how they work, and how to choose and wire each.
MES vs ERP explained — what each does, real-time shop floor vs enterprise planning, the ISA-95 / Purdue model, MES vs SCADA vs ERP, and whether you need both.
Modbus vs Profibus compared — protocol structure, speed, device support, topology, cost, and diagnostics — to help you choose the right fieldbus.
Motor starter vs contactor explained — why a starter is a contactor plus overload protection, the types of starters, and when each is the right choice.
MQTT Sparkplug B vs OPC UA compared — pub/sub vs client/server, data models, bandwidth, report-by-exception, and when controls engineers should use each (or both).
MTBF vs MTTR explained — what each reliability metric means, the formulas with worked examples, how they relate to availability, and how to improve them.
NFPA 70E vs OSHA explained — law vs consensus standard, how OSHA enforces electrical safety, how NFPA 70E provides the how-to, and why you follow both.
OPC UA PubSub explained — how publish/subscribe differs from client/server, transports (MQTT, UDP), when to use it, and its role in many-to-many IIoT data flows.
PLC latch and unlatch explained — how OTL/OTU (set/reset) retain state, latch vs a seal-in rung, retentive behavior on power loss, and when to use each.
Pressure transmitter vs pressure switch compared — continuous analog signal vs a single setpoint, cost, diagnostics, and when each is the right choice.
Preventive vs predictive maintenance compared — time-based vs condition-based, cost, downtime, technology, and how to choose the right strategy per asset.
Proximity vs photoelectric sensor compared — sensing range, target materials, how each works, environment, and how to choose for a detection application.
Radar vs ultrasonic level measurement compared — how each works, performance in vapor/foam/dust, range, cost, and how to choose for your tank or vessel.
Industrial robot vs cobot compared — payload, speed, reach, safety, cost, and programming — plus a controls-engineer decision guide for choosing between them.
RTD vs thermocouple compared — temperature range, accuracy, cost, response time, and wiring — plus how each connects to a PLC or temperature transmitter.
RTU vs PLC compared — control vs telemetry focus, distributed remote sites vs fast local control, communications, power, and how the two are converging.
Polling vs report by exception explained — how each moves SCADA data, bandwidth and latency trade-offs, and when to use each for telemetry and IIoT.
SCADA vs MES vs ERP explained — what each layer does, where they sit in the ISA-95 hierarchy, how data flows between them, and why you need all three.
SCARA vs 6-axis robot compared — degrees of freedom, speed, payload, reach, flexibility, and cost — to help you pick the right robot for the task.
SIL vs Performance Level compared — IEC 62061 vs ISO 13849, the rating scales, how PL and SIL map to each other, and which standard to use for machinery.
Sinking vs sourcing and NPN vs PNP explained — what the terms mean, how to wire each to a PLC input or output, and how to avoid the classic wiring mistake.
Stepper motor vs servo motor compared — open vs closed loop, torque-speed curves, accuracy, cost, and how each connects to a PLC and drive for machine motion.
Three-phase motor wiring explained — star (wye) vs delta connections, the 6 lead terminals, dual-voltage motors, and how to reverse rotation safely.
VFD vs servo drive compared — open vs closed loop, precision and dynamics, torque at zero speed, cost, and how to choose for your motion application.
VFD vs soft starter compared — speed control, energy savings, starting torque, cost, and size — plus a clear guide to choosing the right one for your motor.
Acceleration vs velocity in vibration analysis — which parameter to measure at which frequency, units and conversion, and what an industrial sensor outputs to a PLC.
Digital twin vs simulation — a simulation models what could happen; a twin mirrors what is happening via live data. The difference, and which to use, for controls engineers.
Encoder vs resolver compared — how each works, signal types, accuracy, durability, cost, and how each connects to a PLC or drive for motion feedback.
Functional safety vs process safety — how they differ, how they relate (layers of protection), and where the safety PLC and safety instrumented function fit in.
Machine vision vs computer vision explained — scope, hardware, algorithms, and where they overlap, plus how a machine-vision result drives a PLC on the line.
OT vs IT security compared — why OT flips the CIA triad to safety-and-availability-first, why you can't patch a PLC like a laptop, and how IT/OT convergence works.
Pneumatics vs hydraulics compared — pressure, force, speed, cost and precision, when to choose each, and how a PLC controls pneumatic vs hydraulic systems.
Relay logic vs PLC compared — how each implements control logic, cost and reliability trade-offs, when relay logic still makes sense, and how to migrate to a PLC.
VFD vs inverter explained clearly — why an inverter is one stage inside a VFD, the three meanings of 'inverter', a side-by-side comparison, and when to use each.
Intensive PLC bootcamps promise job-ready skills in weeks for thousands of dollars; self-study takes longer but costs almost nothing. An honest comparison of outcomes, costs, and who each path actually suits.
Is a PLC a computer? Technically yes, practically different. This guide explains why PLCs are specialised industrial computers, how programmable logic controllers differ from PCs, and why 'programmable logic computer' is a common misspelling.
Comprehensive comparison of Omron vs Siemens PLCs for machine automation. Compare NJ/NX vs S7-1500, Sysmac Studio vs TIA Portal, cost, motion control, and industry applications.