Software design
Program structure, sequences, interfaces and diagnostic philosophy aligned to the requirement.
PLC engineering service
PLC Programming & Upgrades
Maintainable PLC software for new equipment, production improvements and carefully controlled upgrades.
Practical engineering support
Built around the system you need to operate.
D&H Technology Leicester develops and modifies PLC software around the real machine sequence, its operators, electrical interfaces and diagnostic needs. The result is logic that is easier to test, commission and support.
What we can support
- New PLC software for machinery and process control
- Existing program modifications and functional improvements
- Legacy PLC migration and obsolescence-led upgrades
- I/O mapping, device integration and industrial networks
- Alarm, permissive, interlock and sequence development
- Online diagnostics, fault investigation and software recovery
Typical deliverables
Clear engineering from definition to handover.
The exact deliverables are agreed around the project scope, customer process and available information.
PLC application
Structured logic, clear naming and maintainable function blocks for the agreed platform.
Test evidence
Recorded functional testing, issue resolution and controlled software handover.
Platforms and systems
Experience across common industrial technologies.
The final platform is selected or supported according to the existing equipment, project standards and lifecycle needs.
Siemens TIA PortalS7-1200S7-1500S7-300Rockwell ControlLogixMicro800PROFINETPROFIBUS
Start a project enquiry
Need support with plc programming?
Send a short description with any available photos, drawings, software details or project documents. We’ll use that information to understand the scope and recommend the right next step.