I'm convinced that buying a PLC based solely on its catalog price is one of the most expensive mistakes an engineer can make.
Let me be blunt: for the first four years of my career, I was that guy. I'd grab the spec sheet, find the cheapest controller that met the I/O count, and call it a day. I thought I was being a hero for the project budget. I was dead wrong.
I've been handling automation specifications and procurement for a mid-sized system integrator for about 8 years now. In that time, I've personally made (and meticulously documented) over a dozen significant procurement mistakes, totaling roughly $45,000 in wasted budget on hardware alone. Now, I maintain our team's pre-purchase checklist, and the first item on that list isn't the price. It's the Total Cost of Ownership (TCO).
Here's why you need to shift your thinking, especially when looking at a robust ecosystem like Omron PLCs.
My $3,200 Lesson in TCO
In my first year (2017), I was sourcing controllers for a simple packaging line upgrade. The spec called for a basic PLC with Ethernet/IP. I compared two options: a bare-bones, low-cost unit from a no-name brand, and a slightly more expensive Omron CP1L. The Omron was about $350 more on the initial quote.
I chose the cheap one. It looked fine on my screen. That mistake cost $3,200.
Here's how the math worked out:
- Initial Price: $680 (cheap unit) vs. $1,030 (Omron CP1L)
- Programming Time (3 extra days): The software was terrible. No libraries, no structured text support. I had to write everything from scratch. Cost: $2,400 in lost labor.
- Support Call: One frantic Saturday call to a distributor who barely knew the product. Cost: $200.
- Replacement Cable: The proprietary connector broke. Had to order a non-standard replacement. Cost: $120 + 2-day shipping delay.
The Omron option, with CX-One programming software (which I already had a license for), a standard USB cable, and a call to a local distributor who knew the CP1L inside out, would have been cheaper by nearly $2,200. That's when I learned that the sticker price is just the entry fee.
The Cost of Training (and Retraining)
This is a hidden one that most people don't calculate. You can buy a cheap PLC, but can you staff it? In 2019, we brought in a new junior engineer. He was sharp, but his entire school experience was on Allen-Bradley and Siemens. We were using a niche controller on one legacy line.
The cost to train him on that specific platform? Basically zero, because there weren't any formal courses. He had to learn by reading a poorly translated manual. It took him 4 weeks to become marginally productive. The lost productivity cost us roughly $4,000.
Now, compare that to the Omron ecosystem. When I need to train a new hire on the NX or NJ series, I send them to an Omron PLC training course. As of early 2024, omron.plc offers structured classes. The investment is $1,500 for a 3-day course. In one week, the engineer is productive. The ROI is immediate and obvious.
The 'Hidden' Catalog: Spare Parts and The 'What If' Factor
Here's another thing I never considered early in my career: the cost of emergency procurement. An Omron PLC catalogue isn't just a list of models; it's a promise of availability. If my CJ2M CPU fails on a Tuesday, I can call any major distributor and have a replacement by Wednesday morning. The cost is predictable. The downtime is minimal.
With an orphaned or niche controller? You're sourcing parts on eBay or waiting 6 weeks for a ship from overseas. I experienced this in September 2022 when a proprietary module on an old line failed. The part was discontinued. Production was down for 4 days while we re-engineered the solution. The cost of that downtime was over $15,000.
That $350 you saved on the initial purchase can evaporate in a single hour of unplanned downtime. Period.
Objection Handling: "But My Budget is Tight This Quarter"
I hear you. I really do. In the world of B2B procurement, quarterly budgets are a beast. Finance people see the $1,000 Omron PLC and the $650 competitor and they point to the $350 difference. It looks like a win.
To that, I'd argue: You aren't buying a PLC. You're buying a business outcome.
The question isn't "Which one costs less?" The question is "Which one costs less to operate over the next 5-7 years?" The premium you spend on a trusted brand with a global support network (like Omron) is an insurance policy against production delays and excessive engineering labor. It's a cost of doing business, not a frivolous expense.
The Bottom Line
I've made the mistake of treating PLCs like commodities. They aren't. A cheap controller on a shelf is a liability. An Omron PLC with a known support network, standardized software, and available training is an asset.
Stop buying on price. Start buying on Total Cost of Ownership. Your sanity, your project budget, and your production line will thank you.
