ABB ACH580 - Validation Test Procedure; STO Maintenance

USER’S MANUAL
20/26
EN ISO 13849-2:2012
Safety of machinery – Safety-related parts of
control systems – Part 2: Validation
The function also corresponds to Prevention of unexpected start-up as specified by
EN 1037:1995 + A1:2008 and Uncontrolled stop (stop category 0) as specified in EN 60204-1:2006 +
AC:2010.
Validation test procedure
After wiring the Safe torque off function, validate its operation as follows.
Action
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WARNING!
Obey the safety instructions. If you ignore them, injury or death, or damage to
the equipment can occur.
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Ensure that the drive can be run and stopped freely during start-up.
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Stop the drive (if running), switch the input power off and isolate the drive from the power line by
a disconnector.
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Check the Safe torque off circuit connections against the wiring diagram.
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Switch the power on.
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Test the operation of the STO function when the motor is stopped.
• Give a stop command for the drive (if running) and wait until the motor shaft is at a
standstill.
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Ensure that the drive operates as follows:
• Open the STO circuit. The drive generates an indication if one is defined for the stopped
state in parameter 31.22 STO indication run/stop.
• Give a start command to verify that the STO function blocks the drive’s operation.
• The drive displays a warning. The motor should not start.
• Close the STO circuit.
• Reset any active faults. Restart the drive and check that the motor runs normally.
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Test the operation of the STO function when the motor is running.
• Start the drive and ensure the motor is running.
• Open the STO circuit. The motor should stop. The drive generates an indication if one is
defined for the ‘running’ state in parameter 31.22 STO indication run/stop.
• Reset any active faults and try to start the drive.
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Document and sign the acceptance test report which verifies that the safety function is safe and
accepted for operation.
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STO Maintenance
After the operation of the circuit is validated at start-up, the STO function shall be maintained by peri-
odic proof testing. In high demand mode of operation, the maximum proof test interval is 20 years. In
low demand mode of operation, the maximum proof test interval is 10 years. The test procedure is given
in section Validation test procedure.
In addition to proof testing, it is a good practice to check the operation of the function when other
maintenance procedures are carried out on the machinery.
Include the Safe torque off operation test described above in the routine maintenance program of the
machinery that the drive runs.
If any wiring or component change is needed after start up, or the parameters are restored, follow the
test given in section Validation test procedure.