PLC, SCADA & HMI Programming
Control software for industrial automation in Ontario — Allen-Bradley, Siemens, Mitsubishi, and Omron PLC programming, SCADA development, and HMI screens built for the floor, not the demo.
Control Software Across PLC, SCADA, and HMI
PLC Programming
Ladder logic, structured text, and function block programming across Allen-Bradley, Siemens, Mitsubishi, and Omron platforms.
HMI Design & Programming
Operator screens built for the person running the line — not just whoever wrote the code.
SCADA Development
Plant-wide visibility across multiple lines and cells, built on the data your control system already has.
Data Collection & Reporting
Production counts, downtime tracking, and reporting that gives you a real answer when someone asks why the line was down.
Fault Handling & Diagnostics
Fault messages that tell an operator what's actually wrong — not just a code number they have to look up.
Network & Communication
EtherNet/IP, PROFINET, and DeviceNet integration between PLCs, drives, robots, and HMIs on the same network.
Written to Be Run, Troubleshot, and Maintained
Documented for the Next Person
Commented logic and tag naming that makes sense to whoever has to open the program after us — including us, a year later.
Built for Troubleshooting
Programs structured so a maintenance tech can find the problem at 2am, not just so it works during the demo.
Faults That Mean Something
Fault and alarm text written for the operator on the floor, not a generic code number tied to an internal bit.
Programmed for Production
Logic and screens validated against real operating conditions and edge cases, not just the happy path.
Sample Screens and Logic From Real Projects
HMI & Operator Screens
PLC Logic & Diagnostics
- • New system requires control software from scratch
- • Existing PLC or HMI program needs modification or improvement
- • Data collection or production reporting capability required
- • Fault diagnostics need to be clearer for operators and maintenance
Common Questions
What PLC platforms do you program?
Allen-Bradley, Siemens, Mitsubishi, and Omron. Most projects land on Allen-Bradley or Siemens, but we'll work in whatever platform is already on your floor.
Can you modify or take over an existing PLC program?
Yes. We regularly pick up programs we didn't write originally — reviewing the existing logic before making changes so nothing gets broken in the process.
Do you design the HMI screens, or just the PLC logic?
Both. Operator screens are scoped alongside the PLC logic, not bolted on afterward, so what the operator sees actually matches what the system is doing.
Can you add data collection or reporting to an existing line?
Yes — this is often added to an existing PLC program without a full rewrite, depending on what data the control system already has available.
Do you provide documented, commented program files?
Yes. Every program ships with commented logic and sensible tag naming, so it can be supported by someone other than the person who wrote it.
Related Services
Ready to Discuss Your Project?
We work with plant managers, OEMs, and integrators across Ontario. Let's talk about what you need.
+1 (905) 960-9535company@gohncontrols.comSend Us a Message