9
vacon • 107
Safe Torque Off
9.8
Maintenance and diagnostics
The STO function or the STO input/output terminals do not need any maintenance.
The following table shows faults that may be generated by the software that monitors the hardware
related to the STO safety function. If you detect any failure in safety functions, including STO, contact
your local Vacon supplier.
If any service or repair has to be conducted on the drive installed, please inspect the
checklist given in Table 48.
During maintenance breaks, or in case of service/repair,
ALWAYS
make sure that the
STO function is available and fully functional by testing it.
Fault Code
Fault
Cause
Correction
30
STO fault
STO inputs in a different
state or both de-ener-
gized
Check cabling
Table 49. Fault related to the STO function.
Summary of Contents for 20 CP
Page 1: ...vacon 20 cp ac drives installation Technical and Maintenance manual ...
Page 2: ......
Page 6: ...vacon 3 ...
Page 16: ...1 vacon 13 Safety Figure 6 STO certificate ...
Page 18: ...1 vacon 15 Safety ...
Page 24: ...vacon 21 Receipt of delivery 2 ...
Page 36: ...3 vacon 33 Mounting ...
Page 48: ...4 vacon 45 Power cabling ...
Page 64: ...5 vacon 61 Control unit ...