Software Development

Industrial PLC and embedded controller software that works at three in the morning — not just in the demo.

Every control system runs on hardware — an industrial PLC in a switchboard, an embedded controller inside a piece of equipment, or a safety-rated module managing a critical function. The software on that hardware is what determines whether the system works reliably, responds quickly enough, and can be maintained by someone other than the person who wrote it.

We develop software for both — Siemens, Allen-Bradley, Beckhoff and Bachmann on the PLC side; TTControl, Bosch and custom hardware on the embedded side; MATLAB and Simulink for model-based development with automatic code generation to target hardware. We handle industrial and vehicle communication protocols, build custom operator interfaces where they're needed, and structure the code so it stays maintainable long after the project team moves on.

The Problem
Controller software is where promises meet reality

It's not enough for the software to pass a demo. It has to handle every operating condition, not just the convenient ones. And it has to be maintainable — because the engineer who commissions a system is rarely the one who has to fault-find it at three in the morning.

What We Do
Industrial PLCs

Siemens, Allen-Bradley, Beckhoff, Bachmann. Safety PLCs where the application calls for them. Structured code, clear documentation, proper versioning.

Embedded controllers

Automotive and mobile machine controllers from TTControl and Bosch, as well as custom hardware. MATLAB / Simulink model-based development with automatic code generation for rapid deployment to target hardware.

Communications that actually work

PLC-to-drive, BMS-to-power-controller, sensors-to-supervisory — industrial and vehicle communication protocols, timing and error handling. Most "system integration" problems come down to communications that were assumed, not engineered.

Operator interfaces

Custom HMI and supervisory screens where needed — clear visibility of what the system is doing, without burying operators in unnecessary complexity.

Code that doesn't become a liability

Structured, well-documented, straightforward to maintain — so whoever inherits it can understand and change it without rewriting from scratch.

Properly tested before it ships

Production code is exercised against simulated plant via software-in-the-loop (SiL), and target hardware against realistic loads, sensors and networks via hardware-in-the-loop (HiL) in our dedicated test facility — including the fault and edge cases that are unsafe or impossible to reproduce on real equipment. See Test and Validation for the full approach.

Get in touch
Talk to us about PLC or embedded development

info@4mcontrols.com