4.8.4. Enabling the “STO” Function
The,“STO”,function,is,always,enabled,in,the,drive,regardless,of,operating,mode,or,parameter,changes,made,by,the,user,
4.8.5. 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 4.8.4 “STO“,,Operation and 4.8.5 “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 4.8.4
“STO“,,Operation and 4.8.5 “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 13.1 ”Fault messages” for further guidance.
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