A dynamic process and instrumentation diagram connects the treatment layout to equipment status and measurements. Its value depends on correct mapping and clear handling of stale or invalid signals.
Start from the approved process diagram
Confirm tanks, pipes, pumps, valves and measurement points against current plant records. Keep equipment identifiers consistent with the asset register. Mark diagram revisions when the physical process or measurement location changes.
Map each displayed state to its source
Document which PLC address or data record drives each symbol and label. Explain status codes and operating modes. Avoid inferring that a pump is running only from a command when verified feedback is available.
Make abnormal data visible
Use a distinct indication for communication loss, sensor faults and old values. Show the last update time. Operators should not mistake an unchanged symbol for a healthy process when the underlying source has stopped updating.
Check navigation and action permissions
Test that equipment details, trends and alarms open for the correct asset. If commands are included, review authorization and plant conditions separately. Record command feedback and acceptance evidence for the approved scope.
Records to check
| Record group | Evidence to review |
|---|---|
| Symbol | Asset identifier and source address |
| State | Meaning, feedback and update time |
| Navigation | Correct trend, alarm and asset record |
Prepare an assessment with X-IRIS
Bring the current P&ID, equipment register, signal map and a list of permitted monitoring or control functions. Review the implementation roadmap and request an assessment to agree a scope that can be tested.
