ABB ACS355 User Manual page 340

340 Fault tracing
CODE ALARM
2035 SAFE TORQUE
OFF
0309 bit 13
1)
Even when the relay output is configured to indicate alarm conditions (eg parameter
RELAY OUTPUT 1
output.
CAUSE
STO (Safe torque off)
requested and it
functions correctly.
Parameter 3025 STO
OPERATION
react with alarm.
= 5 (ALARM) or 16 (FLT/ALARM)), this alarm is not indicated by a relay
WHAT TO DO
If this was not expected reaction to
safety circuit interruption, check
cabling of safety circuit connected to
STO terminals X1C.
is set to If different reaction is required, change
value of parameter
OPERATION.
Note: Start signal must be reset
(toggled to 0) if STO has been used
while drive has been running.
3025 STO
1401