Wladimir PoljakovIndustrial Automation SpecialistCase №08 · Remote diagnostics
Remote diagnostics on a Schneider PacDrive packaging machine: after roughly one month of downtime, the cause was found in about two hours — an incorrectly wired contact on relay KA20.
to identify the cause
01 / The initial task
After a servo drive had been replaced, a packaging machine with Schneider PacDrive would no longer start. The customer and electricians spent about a month searching for the fault, and the manufacturer connected remotely twice. Drives, power supply and wiring were checked without finding the solution. The task was to identify the start interlock systematically without replacing further healthy components.
02 / My scope of work
Remote connection to the Schneider PacDrive controller and work with the original project
Analysis of live signals, interlocks and PLC logic in SoMachine Motion Logic Builder
Comparison of program states with the electrical diagram and contactor feedback signals
Localization of an incorrect feedback signal from the power contactor
Inspection of relay KA20, which had previously been replaced
Identification of a normally closed contact wired instead of the required normally open contact
Rewiring to the correct contact followed by a functional test
03 / Result
POLJAKOV AUTOMATION / NEXT STEP
Every plant has a different starting point. A short description helps establish the next useful technical step.
