Version 3.11
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4.10.11. 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 the section
4.10.4. “STO” Status and Monitoring on page 27
.
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
and
4.10.4. “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
for further guidance.
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Elec
trical Installation
