Appendix: Safe Torque Off (STO) 199
Validating the operation of a safety function
EN 61508, EN 62061 and EN ISO 13849-1 require that the final assembler of the
machine validates the operation of the safety function with an acceptance test at the
installation site. The acceptance tests for the standard safety functions of the drive
are described in the drive manual.
The acceptance test must be performed:
• by an authorized person
• at initial start-up of the safety function
• after any changes related to the safety function (wiring, components, settings,
etc.)
• after any maintenance work related to the safety function.
• at the proof test interval, T
1
.
Authorized person
Commissioning of the drive and the acceptance test of the safety function must be
carried out by an authorized person with expertise and knowledge of the safety
function. The test must be documented and signed by the authorized person.
Acceptance test reports
Signed acceptance test reports must be stored in the logbook of the machine. The
report shall include documentation of start-up activities and test results, references to
failure reports and resolution of failures. Any new acceptance tests performed due to
changes or maintenance shall be recorded in the logbook.
Preliminary checks
Before powering the drive, check:
• Grounding has been properly connected.
• Energy sources have been properly connected and are operational.
• Transportation stops and packing materials have been removed.
• No physical damage is present.
• All instruments have been properly calibrated.
• All field devices are operational.
• Interfaces are operational.
• Interfaces to other systems and peripherals are operational.
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