“That PLC cycles fast—but can you keep that speed when the plant floor hits 50 °C and the panel is sealed?”
Allen-Bradley vs Mitsubishi PLC — You picked a PLC based on raw scan speed. The MELSEC iQ-F FX5U advertises a basic instruction time of ~34 ns, and that number catches your eye. [...]
Continue Reading →Your PLC Doubled Its I/O — Can the S7-1200 or Micro850 Still Hold Up?
Allen-Bradley vs Siemens PLC — It's the moment nobody budgets for: the line manager adds a dozen remote stations, and suddenly your 14-point CPU needs 28 digital inputs, two analog channels, and a safety overlay. [...]
Continue Reading →Allen-Bradley vs Schneider PLC on a Noisy Generator Feed: The TCO Ledger Nobody Opens
Allen-Bradley vs Schneider PLC — If your plant runs on a diesel genset with ±15% voltage swing and 5–8% total harmonic distortion, the PLC that "works fine" on a stable utility grid can silently destroy your uptime budget. [...]
Continue Reading →Allen-Bradley CompactLogix 5380 vs Omron Sysmac NX1P2: TCO Ledger on a Noisy Generator Feed
Allen-Bradley vs Omron PLC — Nobody buys a PLC for its ability to run on a dirty generator feed. Yet that feed is exactly where the total cost of ownership diverges by a factor that no scan-cycle spec will show you. [...]
Continue Reading →Which PLC fails first in a tight-cooling shelter? Allen-Bradley vs Schneider — myth vs reality
Allen-Bradley vs Schneider PLC — You're looking at a PLC that must survive inside a sheet-metal enclosure with a single 60 CFM fan, summertime outdoor air intake, and a cooling capacity that was sized for a 400 W load, not the 600 W you've… [...]
Continue Reading →Allen-Bradley vs Omron PLC: Which One Survives a Tight-Cooling Shelter?
Allen-Bradley vs Omron PLC — You’re standing inside a 1.8-meter-square shelter on a Texas pad in July. The AC unit is undersized by 2,000 BTU — a budget decision made two years ago. The ambient inside hits 52°C at the back panel. [...]
Continue Reading →“The PLC scan cycle is everything”<br><span>— but which spec actually kills your uptime?</span>
Allen-Bradley vs Siemens PLC — If you’ve ever swapped a PLC because the program “grew into” the memory ceiling, you already know the pain of a hardware redesign mid-project. [...]
Continue Reading →"The scan rate race is a distraction — here is the spec that actually kills uptime"
Allen-Bradley vs Mitsubishi PLC — I've heard it a hundred times in user forums: "Mitsubishi FX5U executes a basic instruction in 34 ns — that's faster than any Allen-Bradley Micro800, so it's the better engine." Stands to reason, right? [...]
Continue Reading →You Picked the Wrong PLC – Here’s the $18,400 Mistake Over Five Years
Allen-Bradley vs Siemens PLC — Every six months I get a call that goes like this: “Robert, we bought a Siemens S7‑1200 for a 48‑I/O machine because the list price was $400 lower. [...]
Continue Reading →1. The $9,700 trap: Why your PLC ‘cheap buy’ actually costs 2.3× more over 5 years
Allen-Bradley vs Mitsubishi PLC — I’ve seen a dozen site managers sign a purchase order for a Mitsubishi iQ‑F FX5U because the hardware sticker was 40 % lower, only to watch the total cost balloon by nearly ten thousand dollars in year three. [...]
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