ABB ACS880-107, Hardware Manual

Page: 193 / 202

Action
Test the operation of the STO function when the motor is running.
• Start the inverter and make sure the motor is running.
• Open the STO circuit. The motor should stop. The inverter 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 inverter.
• Make sure 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 193