Invertek Drives ODL-2-22075-1KF42-SN Installation & Operating Instructions Manual page 25

Enabling the "STO" Function
The "STO" function is always enabled in the drive regardless of operating mode or parameter changes made by the user
Testing the "STO" Function
Before commissioning the system the "STO" function should always be tested for correct operation, this should include the following tests:

With the motor at standstill, and a stop command given to the drive (as per the start source method selected in P1-13):
o
De-energise the "STO" inputs (Drive will display "InHibit").
o
Give a start command (as per the start source method selected in P1-13) and check that the drive still displays "Inhibit" and
that the operation is in line with section 7.1.4 and section 7.1.5 "STO" Status and Monitoring

With the motor running normally (from the drive):
o
De-energise the "STO" inputs
o
Check that the drive displays "InHibit" and that the motor stops and that the operation is in line with the section 7.1.4
"STO" Operation and section 7.1.5 "STO" Status and Monitoring.
"STO" Function Maintenance.
The "STO" function should be included within the control systems scheduled maintenance program so that the function is regularly tested for
integrity (Minimum once per Year), furthermore the function should be integrity tested following any safety system modifications or
maintenance work.
If drive fault messages are observed refer to section 19.1 Fault messages for further guidance.
Safe Torque Off
Optidrive P2 Elevator User Guide V2.30
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