Parameters And Fault Tracing; Maintenance And Diagnostics - Vacon 20 X Installation, Technical And Maintenance Manual

vacon • 75
8.7

Parameters and fault tracing

There are no parameters for the STO function itself.
Before testing the STO function, make sure that the checklist (Table 84) is inspected
and completed.
When STO function is demanded, the drive always generates a fault ("F30") and the
motor stops by coasting.
In the application the STO state can be indicated using a digital output.
To re-enable motor operation, after the STO state, it is necessary to perform the following steps:
• Release the switch or the external device ("F30" is displayed even after this has been
released).
• Reset the fault (through a digital input or from the keypad).
• It is possible that a new start command is required for the restart (depending on the applica-
tion and your parameter settings).
8.8

Maintenance and diagnostics

If any service or repair has to be conducted on the drive installed, please inspect the
checklist given in Table 84.
During maintenance breaks, or in case of service/repair, ALWAYS make sure that the
STO function is available and fully functional by testing it.
The STO function or the STO input 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.
Fault Code
8
Fault
Safe Torque
30
Off
Table 85. Fault related to the STO function.
Cause
Safe torque off signal does
not allow drive to be set as
ready
Safe Torque Off
Correction
Reset the fault and
restart.
Should the fault re-
occur, contact the
distributor near to
you.