Acceptance Test Procedure - ABB ACS880-37 Hardware Manual

244 The Safe torque off function

Acceptance test procedure


After wiring the Safe torque off function, validate its operation as follows.
Notes:
•
If the drive is equipped with safety option +Q950, +Q951, +Q952, +Q957, +Q963,
+Q964, +Q978 or +Q979, do the procedure shown in the documentation of the option.
If the drive is equipped with safety option +Q972 or Q973, do the procedure shown in
the FSO module documentation.
•
All inverter modules must be powered and connected to the STO circuit during the
acceptance test.
Action
WARNING! Follow the safety instructions given in chapter
Ignoring the instructions can cause physical injury or death, or damage to the equipment.
Ensure 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 by
a disconnector.
Check the Safe torque off 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.
Ensure that the inverter operates as follows:
• Open the STO circuit. The inverter generates an indication if one is defined for '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 motor
should not start.
• Close the STO circuit.
• Reset any active faults. Restart the inverter and check that the motor runs normally.
Test the operation of the STO function when the motor is running.
• Start the inverter and ensure the motor is running.
• Open the STO circuit. The motor should stop. The inverter generates an indication if one is defined
for 'running' state in parameter 31.22 (see the firmware manual).
• Reset any active faults and try to start the inverter.
• Ensure that the motor stays at a standstill and the inverter operates as described above in testing
the operation when the motor is stopped.
• Close the STO circuit.
• Reset any active faults. Restart the inverter and check that the motor runs normally.
Safety instructions (page 15).