SCADA Modernization Without Stopping Production: A Brownfield Approach
SCADA modernization moves forward without putting production at risk when it is planned subsystem by subsystem, around operating windows, rather than as one big cutover.
The symptom on site
A new SCADA/HMI structure is needed, but the plant cannot afford unplanned downtime. Old and new servers run side by side, and part of the tag base is undocumented.
Likely root cause
The cutover plan was never split into subsystems; tag parity, a rollback path and operator training were not thought through up front.
What to check
Does the tag list match one-to-one between the old and new system? Has communication been tested per subsystem? Is the rollback path written down? Do historian and reports see the same data throughout the cutover?
The wrong fix
A big-bang cutover without a rollback path, tag parity or operator training on the new alarm structure.
A better approach
Plan the cutover per subsystem: parity tests, communication checks, a staged operator handover and historian/report alignment before old paths are closed.
Our view
We modernize SCADA and historian layers with production continuity as the first constraint.
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