Obsolescence and Migration Planning for Legacy Control Systems

Audit, plan and execute modernisation of PLC, SCADA, drives and networks before ageing hardware and unsupported software create operational risk.

Lifecycle-First, Not Rip-and-Replace

Migration is usually a planning problem before it becomes an engineering problem. We start with the audit and roadmap so upgrades can be sequenced around shutdown windows, budget cycles and operational constraints.

Is Your Control Panel Becoming a Risk?

If your control panel is over 10 years old, ask yourself three questions:

  1. Can you still source replacement parts for what’s inside it?
  2. Has it had quick fixes or workarounds added over the years that nobody properly documented?
  3. Are you seeing more intermittent faults than you were 12 months ago?

If you answered yes to any of those or “I’m not sure”, your panel may already be developing a reliability problem.

Not a crisis. Not yet.

But the kind of thing that quietly gets worse until it takes a line down with it.

Ageing control panels don’t usually fail all at once. They degrade slowly, then suddenly. And by the time the fault is obvious, the cost is a lot higher than it needed to be.

At ElcoTech, we specialise in control panel audits, upgrades and replacements across WA. If your panel is showing any of these signs, it’s worth getting a second set of eyes on it before it becomes an emergency.

Audit & Migration Roadmap

Six deliverables that turn an ageing control system into a sequenced, costed plan.

Asset Inventory & Lifecycle Status

Register of PLCs, HMIs, SCADA servers, drives and network devices with lifecycle status.

Spares & Supply Risk

What is still available, what is scarce and what is already a risk.

Safety & Cyber Risk

Legacy standards gaps, IEC 62443 issues and OT segmentation risks.

Prioritisation Matrix

Sequence based on risk, cost and downtime impact.

Phased Roadmap

Execution plan with hold points, rollback options and shutdown coordination.

CapEx / OpEx Forecast

A practical multi-year budget shape that management can use.

What We Migrate

We preserve useful operational knowledge where it still makes sense, such as tag names, alarm philosophy, sequence logic and existing conventions, while moving the platform onto something supportable.

PLC Platforms

PLC-5, SLC-500, S5, S7-300, Modicon Quantum and Mitsubishi Q migrations.

SCADA & HMI

Wonderware, AVEVA, Ignition, WinCC and FactoryTalk migration work.

Drives & VSDs

Older PowerFlex, Micromaster and Altivar platforms refreshed and retuned.

Networks & Protocols

DH+, Remote I/O, Profibus, serial Modbus and flat OT network refresh.

Hardware Refresh

Panel rebuilds, marshalling rationalisation, RIO swaps and switchgear refresh.

Documentation Rebuild

Tag databases, drawings, FAT/SAT packs and operating documentation.

Industries We Serve

ElcoTech plans and executes obsolescence and migration projects for mining and minerals processing, power and energy, water and wastewater, infrastructure, manufacturing and commercial buildings across Perth, the Pilbara, the Wheatbelt and the South West. Each sector carries its own lifecycle conventions, such as shutdown calendars, regulatory drivers and change-management norms, and we plan to yours, not ours.

Have a system reaching end-of-life?

Tell us what is ageing, what is constrained and when the shutdown windows are available.

Talk to ElcoTech