SERVICE / PLC MIGRATION
PLC Migration
Unsupported controllers, undocumented logic, obsolete I/O, and a cutover that has to work the first time make PLC migration an operating-risk problem before it is a programming problem. VALD Engineering is based in Arizona with nationwide field delivery.
A clean conversion of the wrong logic is still wrong. VALD treats the running process, native controller evidence, field terminations, HMI behavior, and acceptance criteria as one migration boundary.
One engineering boundary from installed evidence through cutover.
VALD inventories the installed controller, I/O, communications, logic, HMI dependencies, and operating constraints before rebuilding the migration package. Equivalency is verified through code review, simulation, FAT, SAT, field evidence, and a controlled cutover plan with an explicit rollback path.
- 01Native-program and I/O reconstruction
- 02Logic, tag, alarm, and HMI equivalency mapping
- 03Hardware, network, and lifecycle architecture
- 04Test procedures, cutover runbook, rollback logic, and turnover
Work from the native evidence.
PLC migration work is built around native engineering evidence and the maintainable destination environment—not an assumed one-for-one hardware swap.
- Rockwell ControlLogix
- Studio 5000
- GE PACSystems
- AVEVA System Platform and Ignition integration
VALD brings more than 20 years of brownfield controls, commissioning, FAT/SAT, loop-check, and high-risk cutover experience to PLC migrations nationwide.
Talk through the problem with the principal engineer.
Send the basics. Robert Maxfield will respond within one business day. Do not paste controlled plant configuration, credentials, or sensitive infrastructure details here.
THE HANDOFF STANDARD
What the client owns after we leave.
No black box and no dependency on a presentation. The record is structured, traceable, and usable by the next engineer.
CONTROLS ASSESSMENT / MIGRATION SCOPING
Scope the problem before it owns the schedule.
Speak directly with principal engineer Robert Maxfield. Expect a response within one business day.