Understand the interface decision

A drive that is energized without position change can indicate several different problems, including brake or mechanical issues. A misleading direction value can also make the controller request unnecessary movement. Diagnosis should preserve the sequence and avoid repeatedly issuing commands while the mechanism’s condition is uncertain.

Electric-yaw arrangements differ between turbine designs. These questions describe control and interface reviews, not confirmed MARSTON hardware or operating logic. The relevant machine design, mechanical limits and risk assessment must establish the permitted movement and response.

Put these inputs in the review record

Use a project-specific worksheet to capture the following information. For each entry, name the document, revision and person responsible for resolving any uncertainty.

• Yaw command, duration and active operating mode. Identify the exact configuration and the supporting document.
• Nacelle-position measurement and evidence of actual motion. Keep the design assumptions visible in the project record.
• Motor current, protective status and brake information where available. Name the responsible reviewer and resolve any missing information.
• Raw and processed wind-direction information around the event. State how this entry will be verified during acceptance.

Define the acceptance boundary

Use the turbine supplier’s diagnostic method and limits on further operation. Do not declare a mechanical stall solely from a dashboard heading that failed to update. Confirm whether the position signal and communication path are working before interpreting the display.

A compact support record should align these signals on one timeline and identify unavailable measurements. It can then distinguish an unconfirmed diagnosis from evidence supporting a specific drive, brake, sensor or control investigation.