ABB ACS880-04 Hardware Manual page 359

of the option. If the inverter is equipped with safety option +Q972, +Q973 or +Q982, do the
procedure shown in the FSO module documentation.
Note: All inverter modules must be powered and connected to the STO circuit during the
acceptance test.
Action
WARNING! Follow the safety instructions given in Safety instructions for ACS880 multidrive
cabinets and modules (3AUA0000102301 [English]). 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 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.
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.
Test the operation of the failure detection of the inverter. The motor can be stopped or running.
• Open the 1st channel of the STO circuit (wire coming to IN1). If the motor was running, it should
coast to a stop. The inverter generates a FA81 Safe torque off 1 loss fault indication (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.
• Open the 2nd channel of the STO circuit (wire coming to IN2). If the motor was running, it should
coast to a stop. The inverter generates a FA82 Safe torque off 2 loss fault indication (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.
Document and sign the acceptance test report which verifies that the safety function is safe and
accepted for operation.
The Safe torque off function 359