Answers to Common
Questions

Absolutely. In many cases, an undocumented or poorly documented control system can be understood, documented, and improved without replacing the entire system.

Our first goal is to understand how the existing system operates. That may involve reviewing PLC programs, HMI screens, electrical drawings, network architecture, instrumentation, and observing the process in operation. As we learn the system, we create documentation that makes it easier to maintain, troubleshoot, and expand in the future.

Once the system is understood, we can help you determine whether targeted improvements, hardware upgrades, or a phased modernization plan make the most sense for your business. A complete replacement is sometimes the right answer—but often it isn't.

Start with a technical assessment before making significant changes.

Many facilities inherit equipment after employee turnover, acquisitions, contractor changes, or years of undocumented modifications. Replacing hardware before understanding the existing system often creates unnecessary cost and risk.

Pitzer Engineering helps clients identify what they have, determine what is working well, document critical systems, uncover hidden risks, and develop a practical roadmap for future improvements. The goal is to help you make informed engineering decisions rather than expensive guesses.

Not necessarily.

Many legacy PLC, HMI, and SCADA systems continue to provide reliable control for years. In many cases, modernization can be accomplished by strengthening the areas that create the most business risk while allowing proven equipment to remain in service.

Examples include improving documentation, replacing obsolete components, adding remote monitoring, integrating cloud dashboards, improving cybersecurity, upgrading operator interfaces, or connecting previously isolated equipment to modern reporting systems.

Modernization is often most successful when performed in carefully planned phases rather than through a complete "rip and replace" project.

Yes.

One of the most effective ways to increase the value of existing equipment is to make operational data more accessible.

Pitzer Engineering helps clients connect PLCs, instrumentation, and industrial equipment to historians, dashboards, cloud platforms, reporting systems, and AI-ready data environments.

By making reliable operational data available, businesses gain better visibility into production, maintenance, alarms, performance trends, and future optimization opportunities—often without replacing the equipment already performing the work.

The earlier, the better.

One of the most common challenges we see is projects where hardware, software, or vendors have already been selected before anyone evaluates whether the overall system architecture supports the customer's long-term goals.

Bringing in an experienced automation engineer early can help avoid costly redesigns, incompatible technologies, unnecessary downtime, and expensive change orders later in the project.

Yes.

In fact, this is one of the most common reasons clients contact us.

Whether the original programmer has retired, changed companies, or is simply unavailable, we can analyze existing PLC logic, HMI applications, instrumentation, and electrical systems to determine how the system operates and identify the root cause of the problem.

Our goal isn't just to fix today's issue, but to leave you with a better understanding of your system for the future.

Our strongest experience is with Allen-Bradley hardware and software, along with Wonderware, ArchestrA, and Ignition.

We also have experience with Schneider Electric (Modicon), Opto 22, WAGO, AutomationDirect, and other industrial automation platforms.

Even if your specific platform isn't listed, many troubleshooting and modernization principles apply across manufacturers. We're happy to discuss your existing system and determine whether we're a good fit for your project.

Our deepest experience is in oil and gas, where we've spent years designing, troubleshooting, and modernizing industrial automation systems.

We also support water and wastewater facilities, manufacturing, food and agricultural processing, OEM equipment, utilities, industrial infrastructure, and power-related projects.

While every industry has unique processes, the engineering principles behind reliable automation, electrical systems, and industrial controls remain remarkably consistent.

No.

Pitzer Engineering is based in East Tennessee and proudly serves businesses throughout Loudon County and neighboring communities. We also support clients across the contiguous United States through a combination of remote engineering services and on-site visits when appropriate.

Many troubleshooting, documentation, design, and consulting projects can begin remotely, allowing us to respond quickly while minimizing travel costs.

Yes.

Pitzer Engineering provides electrical engineering design review, load calculations, equipment sizing verification, and California Professional Engineer (PE) stamping for qualifying projects.

Our review process is intended to provide confidence that designs are technically sound, code-conscious, and ready to move toward permitting and construction.

That's perfectly okay.

Many customers contact us because they know something isn't working correctly but don't yet know why.

Part of our job is helping identify the real problem before recommending a solution. Through careful troubleshooting, documentation review, and engineering analysis, we help separate symptoms from root causes so your time and budget are spent addressing the issues that matter most.

Our clients appreciate that we're easy to work with, communicate clearly, and genuinely care about helping them succeed.

We don't believe every challenge requires replacing everything and starting over. Instead, we focus on understanding your existing systems, protecting your investment, and recommending practical solutions that align with your operational goals.

Whether we're troubleshooting a legacy PLC, reviewing an electrical design, modernizing an industrial control system, or helping plan the next phase of growth, our goal is the same: to become a trusted engineering partner you can rely on long after the first project is complete.