In modern manufacturing, efficiency, safety, and scalability are non-negotiable. Yet many plants still rely on legacy control systems; aging PLCs, HMIs, and other outdated automation equipment. While these systems may still function, they often act as hidden liabilities that increase risks and undermine confidence in production scheduling.
Upgrading with an experienced system integrator, like Axis Engineering, helps manufacturers eliminate these risks by replacing outdated systems with modern, more capable, and more reliable solutions, delivering true manufacturing peace of mind.
The Problem with Aging PLCs and HMIs
Legacy PLCs and HMIs were not designed for today’s data-driven production environments. Many of the old systems use slow proprietary networks that are hard to connect to and difficult to get data out of.
Many times, since the hardware is obsolete and not current production, “New” spare parts are no longer available. End users can be at the mercy of “as-is” used inventory. This is not the place where the modern manufacturing plant wants to be.
Many of the control systems still in operation were installed 15-20 years ago. The engineers and programmers that installed that system may no longer be available The expertise needed to maintain these platforms is disappearing, which compounds downtime risk.
When downtime occurs, resolving issues can take days, weeks or longer simply because replacement parts or qualified engineers are unavailable.
Cybersecurity is another major concern. Many older systems were never designed for modern network environments:
- Pre-Ethernet systems may not be exposed to today’s risks but are still isolated and difficult to monitor.
- Early Ethernet-based control systems lacked any built-in security, leaving plants highly vulnerable.
Modern threats demand modern protections; something legacy controls simply can’t deliver.
Performance and Productivity Risks
Running outdated controls can also impact productivity. Legacy PLCs often lack the processing power and memory to control and monitor the adjacent upgrades. Operators may face slow HMIs, limited data visualization, and clunky interfaces that lead to inefficiencies and human error. Every second wasted navigating outdated screens or resetting legacy systems is time that should be spent producing.
Scalability Challenges
As manufacturers grow or diversify their operations, legacy systems rarely scale with them. Adding new equipment, integrating advanced robotics, or connecting machine vision often requires expensive, complicated workarounds. Instead of driving growth, these systems become roadblocks, forcing companies to work around outdated infrastructure rather than build on it.
Safety and Compliance Concerns
Legacy control systems can also pose safety hazards. Older panels may not meet current electrical or UL certification standards, and older PLCs may lack current safety requirements to protect workers and equipment. As safety specifications evolve, relying on outdated controls increases the risk of exposing your employees and company to unnecessary safety risks or injuries.
How Axis Can Help
Axis Engineering specializes in replacing obsolete or underperforming PLCs, HMIs, and control panels with modern, fully integrated solutions. Our team provides:
- Design & Engineering tailored to your plant’s unique requirements.
- Custom control panel building and fabrication to current UL and safety standards
- PLC and HMI upgrades that enhance speed, visibility, and data integration.
- System integration expertise that ensures new system works seamlessly with your other equipment.
- Scalable solutions built with tomorrow in mind, so you can expand without reworking your entire system.
Axis provides manufacturing peace of mind – So that you know your systems are reliable, secure, and ready for the future.
Common Questions on Upgrading Controls
Q. Why should I replace my legacy PLC if it still works?
A. Even if it functions, legacy PLCs often lack spare parts, vendor support, and security features. Without expertise on-hand, a simple failure can cause days of downtime. Upgrading reduces that risk and improves reliability.
Q. How does an outdated HMI impact my operation?
A. Older HMIs are at risk from replacement parts not being available. Many times they are slower, harder to use, and may not display real-time data effectively. Modern HMIs improve visibility, speed, and operator efficiency.
Q. What are the risks of not upgrading my control systems?
A. Delaying upgrades can lead to longer downtime, higher maintenance costs, cybersecurity vulnerabilities, and compliance issues with safety standards.
Q. Can Axis handle upgrades without disrupting my production schedule?
A. Yes. Axis designs upgrade plans that minimize downtime, often phasing in new equipment during scheduled shutdowns or low-production periods.
Take the Next Step Toward Reliable Performance
Outdated controls don’t just slow down your plant, they hold your entire business back. With Axis Engineering as your systems integration partner, you can upgrade confidently, knowing your operations will be more efficient, safe, scalable, and secure. Don’t wait for downtime to make the decision for you. Contact Axis Engineering today to schedule a complimentary review and discover how modern control systems can deliver manufacturing peace of mind.