PLC Programming Services
PLC programming services for industrial automation systems, designed to improve reliability, reduce downtime, documentation and support long-term system performance.
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At Stratos Control Systems, we deliver structured PLC programming and machine control solutions for new systems, upgrades, and legacy replacements.
Many PLC upgrade projects also require modifications to existing control panels, making our control panel design and build service a valuable part of delivering a complete automation solution.
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Our focus is on building automation systems that are clear, maintainable, and engineered for real-world industrial environments.
PLC Programming and Industrial Control Panels
PLC programming is only one part of a reliable automation system. The PLC software must work seamlessly with the industrial control panel, electrical hardware, HMIs, drives and field devices to deliver safe and efficient operation.
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At Stratos, our engineers develop PLC software alongside our control panel design and manufacturing teams, ensuring every industrial control panel is programmed, documented and tested as a complete system rather than as separate components.
This integrated approach reduces commissioning time, improves reliability and simplifies future maintenance and upgrades.
How Stratos Delivers Reliable Automation Systems
We follow a structured, engineering-led approach to ensure every system is reliable, maintainable, and scalable:
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Discovery & System Review
We assess existing systems, operational requirements, and future scalability needs. -
Design & Specification
Detailed system design aligned to industry standards and operational requirements. -
Build & Development
Panels, PLC logic, and software developed using structured, repeatable practices. -
Testing & Validation (FAT/SAT)
Systems are rigorously tested before deployment to minimise risk. Before installation, PLC software is tested alongside the completed control panel during Factory Acceptance Testing (FAT). Following installation, Site Acceptance Testing (SAT) verifies that the control panel, PLC program and connected equipment operate correctly under live production conditions. -
Commissioning & Handover
Smooth implementation with full documentation and operator support.
Our PLC Programming & Machine Control Services
PLC Programming & Software Development
We deliver PLC software for industrial automation and machine control projects, focusing on readability, consistency, and long-term support.
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Our PLC programming services include:
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New PLC software development
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Structured programming standards
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Clear comments and documentation
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Supportable software architecture
PLC Upgrades & Migration
When PLC hardware or software becomes obsolete, we deliver planned upgrade and migration strategies that reduce risk and downtime.
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Services include:
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PLC upgrade planning and execution
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Migration from legacy PLC platforms
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Parallel testing and phased changeover
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Minimal disruption to production
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Machine Control Systems
We deliver machine control solutions for OEM and site-based equipment, integrating PLCs with drives, motion, safety, and HMI systems.
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Machine control system design
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PLC-based machine automation
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Integration with existing systems
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Reliable, repeatable machine operation
Legacy PLC Replacement
Unsupported PLCs increase operational risk. We replace legacy PLC systems with modern platforms while maintaining existing machine functionality where possible.
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Many automation projects involve more than replacing an obsolete PLC. Older control panels often require new safety components, updated electrical layouts, revised wiring, improved documentation and additional I/O to support modern equipment.
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Legacy PLC assessment
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Replacement using modern platforms
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Software redevelopment and testing
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Clear handover and documentation
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​Our engineers assess both the PLC software and the wider control panel to recommend whether a full upgrade, partial refurbishment or phased migration offers the best long-term solution.
Commissioning & On-Site Support
We support PLC systems through commissioning and into operation, ensuring systems perform as expected in real-world environments.
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Factory and site commissioning
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Fault finding and optimisation
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Operator and maintenance support
Supported PLC Platforms
Stratos Control Systems primarily delivers PLC solutions using industry-leading platforms:​
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Siemens
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Allen Bradley
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Mitsubishi
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We also support a wide range of legacy and specialist PLC systems, particularly as part of upgrade and migration projects.
Why Structured PLC Programming Matters
PLC software is often the single biggest factor in whether an automation system is reliable or a constant source of problems. Poorly written or undocumented PLC code increases downtime, slows fault finding, and makes future upgrades risky and expensive.
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Stratos Control Systems designs PLC software that is:
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Clearly structured
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Consistently written
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Properly documented
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Aligned with industry best practice
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We don’t deliver quick fixes, we deliver PLC systems engineers can support with confidence.
Common PLC & Machine Control Challenges We Solve
We are frequently engaged to resolve issues caused by poorly designed or ageing PLC systems, including:
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Poorly structured or undocumented PLC code
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Obsolete or unsupported PLC hardware
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Difficult integration between machines and systems
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Software that is hard to fault find or modify
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Inconsistent standards across machines or sites
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Our approach removes these risks by applying clean software architecture, clear standards, and proven platforms.
Industries We Support
Our PLC programming services support a wide range of industries, including:
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Manufacturing
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Food & Beverage
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Pharmaceuticals
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Packaging
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Material Handling
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Heavy Engineering
Why Choose Stratos Control Systems for PLC Programming
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Experienced industrial automation engineers
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Structured, standards-based PLC programming
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Strong focus on fault finding, diagnostics, and maintainability
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Proven experience with new systems and legacy upgrades
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Expertise across Siemens, Allen Bradley, and Mitsubishi platforms
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We deliver PLC systems that work reliably today and remain supportable tomorrow.​
Frequently Asked Questions
Talk to Us About Your PLC System
Whether you need new PLC software, an upgrade to legacy systems, or improved machine control reliability, Stratos Control Systems can help.