TechControl provides industrial troubleshooting for PLC, HMI, VFD, network, control-panel, and machine-downtime issues. We investigate the first cause before making changes, helping plants recover production without rewriting working logic unnecessarily.
What troubleshooting includes
- Fault history, recent changes, and backups first
- Network, power, and I/O before guessing at code
- Documented findings so the next shift is not starting over
Common problems we solve
Typical calls include PLCs that will not run, lost HMI communications, EtherNet/IP failures, PowerFlex faults, incorrect I/O states, intermittent sensors, failed remote I/O, unexplained stops, and machine faults after a change or replacement part.
Our process
We start with fault history, recent changes, backups, and production context. We then check power, safety status, I/O, devices, networks, PLC logic, and HMI diagnostics in a controlled order. Findings are documented, the correction is tested under normal and fault conditions, and final backups or configuration changes are recorded. Timelines depend on the fault, equipment access, and replacement-part availability.
Technologies, industries, and service areas
We work with Allen-Bradley, CompactLogix, ControlLogix, Studio 5000, FactoryTalk View, PowerFlex, EtherNet/IP, Siemens, Omron, and existing industrial control systems. Support is available in Mississauga, Toronto, Etobicoke, Brampton, Vaughan, Hamilton, Oakville, Guelph, across Canada, and travel-based projects including Europe.
Frequently asked questions
Do you provide emergency support?
We support urgent downtime calls based on availability and the equipment, platform, and fault information provided.
Can you troubleshoot an existing program?
Yes. We assess the running logic, online diagnostics, I/O, networks, and field devices while preserving available backups.
Do you troubleshoot drives and HMIs?
Yes. We investigate HMI paths, PLC communication, drive faults, network connections, and control interlocks.
What should we have ready?
Bring available backups, drawings, fault codes, recent-change details, and machine history.
See the Troubleshooting Library, including PLC I/O troubleshooting and PowerFlex troubleshooting.