2
Fault list – safety technology
Fault 62 STO output
Manual – Fault Descriptions MOVISAFE
®
CS..A
48
Subfault: 62.4
Description: Extended diagnostics STO: test interval exceeded
Fault class: Warning
Cause
Measure
User error: The parameter "Extended diagnostics
STO" is set to "Test when deactivated and time
monitoring". But no test has been performed
within 8 hours.
– Activate and deactivate the STO drive safety
function at least once within 8 hours.
– If time monitoring is not needed for the "Extend-
ed diagnostics STO" function, deactivate the
function.
Subfault: 62.5
Description: Excessive cyclic switching
Fault class: Output fault
Cause
Measure
Failed to complete diagnostics because of ex-
cessive cyclic switching.
– Check the application.
– Make sure that the STO drive safety function is
active or inactive at least once for 2.5 seconds
within 60 seconds.
Subfault: 62.6
Description: STO control internal fault
Fault class: Output fault
Cause
Measure
Fault detected on safety card by internal test of
STO control.
If the fault occurs repeatedly, replace the device
and send it together with the fault number to
SEW‑EURODRIVE. For further support, contact
SEW‑EURODRIVE Service.
Subfault: 62.7
Description: Undervoltage DC 24 V during diagnostics
Fault class: Output fault
Cause
Measure
Undervoltage of DC 24 V supply voltage detected
during diagnostics.
– Check the DC 24 V supply voltage (permitted
voltage range, voltage dips).
– If the fault occurs repeatedly, replace the device
and send it together with the fault number to
SEW‑EURODRIVE, or replace the voltage sup-
ply. For further support, contact
SEW‑EURODRIVE Service.
27799182/EN – 10/2022
