Category: Commissioning & Troubleshooting
Home Position Shifts with Speed? Check the Referencing Edge
A home position that changes with approach speed may reflect input timing or the chosen reference edge.
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Audit Log Names a Shared Account? The Missing Identity Matters
An audit trail can record a change without identifying the individual who made it.
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Your FAT Passed Every Normal Cycle? Add the Missing Negative Tests
A successful normal cycle proves only the path that was exercised.
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PLC File Says Final but the Controller Differs? Compare the Evidence
A filename such as final does not establish what is running in the controller.
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The Spare PLC Is the Right Model but Still Unsuitable? Check Compatibility
Matching the catalog number is only part of a replacement plan.
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Maintenance Handover Says Fixed? Leave Evidence the Next Shift Can Use
A useful handover explains what failed, what changed, and how the result was verified.
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PLC and SCADA Blame Different Events First? Align the Clocks Before the Timeline
Two event logs can disagree about cause and effect when their clocks differ.
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Pressure Switch Says Ready but the Clamp Isn\’t Holding? Pressure Is Only One Clue
A pressure signal does not automatically prove that a clamp has contacted the workpiece or developed the required holding force.
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One Trip Creates Twenty Alarms? Capture the First Useful Cause
A shutdown can create many secondary alarms that obscure the initiating condition.
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Your PLC Backup Opens Fine—Can It Actually Restore the Machine?
A project file that opens successfully is not the same as a tested recovery package.
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