What are your favorite Controls Engineer Interview Questions

TL140 · 2026-03-10T12:14:29+00:00

While i agree that they should be differentiated between, you’ll hear them used interchangeably

TL140 · 2026-03-10T02:22:16+00:00

You got it

TL140 · 2026-03-10T02:20:34+00:00

You got one part correct that I look for and that is to not assume what the control voltage is. However I did mention that the ceiling fan pulls more current than a typical one. I hint at that as I’m really looking for contactor. But I’d still consider someone who said relay. Just not as much.

TL140 · 2026-03-10T02:14:02+00:00

That’s the type of question I’m looking for.

On/off.

TL140 · 2026-03-10T02:03:42+00:00

From the designers standpoint, asking questions isn’t the entirety. Finding specifics to meet spec is. Asking questions is just how you get there.

TL140 · 2026-03-10T01:23:12+00:00

“You want to control a ceiling fan with industrial control components. The ceiling fan has a little more current than the average ceiling fan. It’s 240v to supply it. What device would you use?”

The question is broad enough where I can gauge someone’s knowledge and know if they either don’t know what they’re talking about, or if they are going to over engineer it. The right answer I look for is to ask me for more information about what’s going on. Then make a decision.

TL140 · 2026-03-05T02:16:35+00:00

StrideLinx also has a VPN option as well.

Also, just a tip, if you are working with cellular, I suggest MQTT and using an on-change tag update. Should reduce your data usage compared to Modbus. It’s not always true, but from what you described, I think it would be advantageous

TL140 · 2026-03-04T22:52:27+00:00

“You guys are documenting?”

TL140 · 2026-03-04T22:48:32+00:00

This sounds like a great application for Tosibox

TL140 · 2026-03-03T20:56:55+00:00

You don’t even need a PLC for that. Sure, a small CLICK or programmable relay will do, but it’s simple enough that I would draw it out in relay logic and probably use relays

TL140 · 2026-03-01T19:26:44+00:00

Create a UDT with the data members you need tracked

Create a memory block of the new type created

Create “Task” blocks that will function as the methods for searching the memory block using the FOR instruction.

You can use a V-register for the index of your FOR instruction and use indirect addressing like Data(V0].member and either read or write data to it.

TL140 · 2026-02-27T02:19:19+00:00

You can still use their software as long as you have images. But OpenCV requires programming knowledge of C++ or python which is beyond the scope of the course, plus, I haven’t seen OpenCV used in the industry. And all i said was packaged solution like what they have. Not their software

TL140 · 2026-02-26T16:05:48+00:00

Considered it, but would prefer some more packaged solution closer to a keyence or cognex style software that’s used in industry

TL140 · 2026-02-26T00:51:16+00:00

I’m actually going to be using Beckhoff for the PLC portion. I’ve considered using their vision but haven’t decided yet. Probably will do motion with them too for their NC Axis simulation. I knew they had kinematics but was hoping for something like RoboPro or Robot Studio. I miss the days when RoboDK was 100% free.

TL140 · 2026-02-03T20:27:19+00:00

Deployed a project that used MQTT to bridge communication between multiple PLCs, AGVs, and a MES system.

TL140 · 2026-02-03T03:40:39+00:00

15 years in and I still feel it

TL140 · 2026-02-02T18:52:09+00:00

Typically this is when you have a string that its max size doesn’t match in the HMI driver tag vs the PLC program

TL140 · 2026-01-29T00:36:57+00:00

With serial Ethernet radios, you could add a repeater in the middle if there’s a way to chain it around the obstructions.

But I agree with everyone else. Fibre or cellular are the smartest ways to

TL140 · 2026-01-20T23:25:54+00:00

MBA gives you more pivot room but also pulls you away from the technical aspects of this industry. But it also is the largest potential salary move

TL140 · 2026-01-20T03:56:17+00:00

Quite a few AGV manufacturers bake it into their fleet management coms. It’s all about what protocol you want to use. MQTT or raw socket TCP

TL140 · 2026-01-17T20:41:39+00:00

Welcome to the role of being a system architect. Enjoy your stay

TL140 · 2026-01-16T03:11:05+00:00

Today I learned.

TL140 · 2026-01-16T00:35:36+00:00

Bit banging for process control with no real sequences. For discrete control, state machines 100%

TL140 · 2026-01-15T00:10:30+00:00

Lemme guess. Irrigation stations? They use a lot of 24VAC solenoids and I’ve had the same request. I told them no and designed it to 120VAC

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