Vacon OPTAF - Page 37

STO AND SS1 SAFETY FUNCTIONS vacon • 35
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
Table 11 shows faults that may be generated from the software part that monitors the hardware re-
lated to the STO safety function. If some of the faults listed below occur, the fault may NOT be reset.
Table 10. Warning/alarm indicating that STO safety function is active
Fault code Warning Subcode Possible cause Correcting measures
30 SafeTorque-
Off
1 STO inputs SD1
& SD2 are
activated through the OPTAF
option board.
Table 11. Single hardware problems detected in the STO safety function
Fault code Fault Subcode Possible cause Correcting measures
8System Fault30 STO inputs are in diffe-
rent state. This fault
occurs when the SD
inputs are in different
state more than 5 sec-
onds.
- Check the S1 switch.
- Check the cabling to
the OPTAF board
- Single hardware
problem possible in
either OPTAF board
or VACON
®
NXP
control board
.
8System Fault31 Thermistor short circuit
detected.
- Correct the cabling
- Check the jumper for
the thermistor short
circuit supervision, if
thermistor function
is not used, and the
thermistor input is
short circuited.
8System Fault32 OPTAF board has been
removed.
- It is not allowed to
remove the OPTAF
board once it has
been recognized by
the software. NOTE!
There is only one
method to clear this
fault. By writing
"OPTAF Removed"
to "1" and then back
to "0" again. This
variable is found
from the "System
Menu" "Security"
(6.5.5).
8System Fault33 OPTAF board EEPROM
error (checksum, not
answering…).
- Change the OPTAF
board.
8System Fault34...36 OPTAF supply voltage
hardware problem
detected.
- Change the OPTAF
board.