Start-Up Including Acceptance Test; Competence; Acceptance Test Reports; Acceptance Test Procedure - ABB ACS880-107 Series Hardware Manual

192 The Safe torque off function

Start-up including acceptance test

To ensure the safe operation of a safety function, validation is required. The final assembler
of the machine must validate the function by performing an acceptance test. The acceptance
test must be performed
• at initial start-up of the safety function
• after any changes related to the safety function (circuit boards, wiring, components,
settings, etc.)
• after any maintenance work related to the safety function.
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Competence

The acceptance test of the safety function must be carried out by a competent person with
adequate expertise and knowledge of the safety function as well as functional safety, as
required by IEC 61508-1 clause 6. The test procedures and report must be documented
and signed by this person.
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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 logged into the logbook.
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Acceptance test procedure

After wiring the Safe torque off function, validate its operation as follows.
Note: If the drive is equipped with safety option +L536, +L537, +Q950, +Q951, +Q952,
+Q957, +Q963, +Q964, +Q978 or +Q979, do the procedure shown in the documentation
of the option.
Note: All inverter modules of the inverter unit must be powered and connected to the STO
circuit during the acceptance test.
Action
WARNING!
Obey the safety instructions. If you ignore them, injury or death, or damage to the equipment
can occur.
Make sure that the inverter can be run and stopped freely during start-up.
Stop the inverter (if running), switch the input power off and isolate the inverter from the power line
using a disconnector.
Check the STO circuit connections against the wiring diagram.
Close the disconnector and switch the power on.
Test the operation of the STO function when the motor is stopped.
• Give a stop command for the inverter (if running) and wait until the motor shaft is at a standstill.
Make sure that the inverter operates as follows:
• Open the STO circuit. The inverter generates an indication if one is defined for the 'stopped' state
in parameter 31.22 (see the firmware manual).
• Give a start command to verify that the STO function blocks the inverter's operation. The inverter
generates a warning. The motor should not start.
• Close the STO circuit.
• Reset any active faults. Restart the inverter and check that the motor runs normally.