ABB ACS180-04S-03A7-1, Hardware Manual, Page: 171 / 192

Action
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.
Make sure 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 (see the firmware manual).
• Give a start command to verify that the STO function blocks the drive's operation.
The motor should not start.
• Close the STO circuit.
• Reset any active faults. Restart the drive and check that the motor runs normally.
Test the operation of the STO function when the motor is running.
• Start the drive and make sure 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 (see the firmware
manual).
• Reset any active faults and try to start the drive.
• Make sure that the motor stays at a standstill and the drive operates as described
above in testing the operation when the motor is stopped.
• Close the STO circuit.
• Reset any active faults. Restart the drive and check that the motor runs normally.
Test the operation of the failure detection of the drive. The motor can be stopped
or running.
• Open the 1st input channel of the STO circuit. If the motor was running, it should
coast to a stop. The drive generates an FA81 fault indication (see the firmware
manual).
• Give a start command to verify that the STO function blocks the drive's operation.
The motor should not start.
• Open the STO circuit (both channels).
• Give a reset command.
• Close the STO circuit (both channels).
• Reset any active faults. Restart the drive and check that the motor runs normally.
• Open the 2nd input channel of the STO circuit. If the motor was running, it should
coast to a stop. The drive generates an FA82 fault indication (see the firmware
manual).
• Give a start command to verify that the STO function blocks the drive's operation.
The motor should not start.
• Open the STO circuit (both channels).
• Give a reset command.
• Close the STO circuit (both channels).
• Reset any active faults. Restart the drive and check that the motor runs normally.
Document and sign the validation test report which verifies that the safety function
is safe and accepted for operation.
The Safe torque off function 171