IMO SD1 Series - Page 170

SD1 Series Inverters STO Function DescriptionOptional Peripheral Accessories
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Item
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Ensure that the drive can be run or stopped randomly during commissioning.
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Stop the drive (if it is running), disconnect the input power supply, and isolate
the drive from the power cable through the switch.
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Check the STO circuit connection according to the circuit diagram.
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Check whether the shielding layer of the STO input cable is connected to the
+24 V reference ground COM.
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Connect the power supply.
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Test the STO function as follows the motor stops running:
 If the drive is running, send a stop command to it and wait until the shaft
of the motor stops rotating.
 Activate the STO circuit and send a start command to the drive. Ensure
that the motor does not start.

Deactivate the STO circuit.
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Restart the drive, and check whether the motor is running properly.
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Test the STO function as follows when the motor is running:
 Start the drive. Ensure that the motor is running properly.
 Activate the STO circuit.
 The drive reports an STO fault. Ensure that the motor coasts to stop
rotating.
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Deactivate the STO circuit.
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Restart the drive, and check whether the motor is running properly.