Safety option 30
Safety functions
Safe torque off
l
45
EDS84DPSO01 EN 2.1
5.6
Safety functions
5.6.1
Safe torque off
S
afe
T
orque
O
ff/STO
This function corresponds to a "Stop 0" according to EN 60204.
When this function is used, the power supply of the motor is immediately (t1) safely
interrupted. The motor cannot create a torque and thus no dangerous movements of the
drive can occur. Additional measures, e.g. mechanical brakes are needed against
movements caused by external force.
t
t
n
0
0
1
2
t1
I
STO
t1
t
0
I
0
SM301DIA_STO
0
Input signal of the request of a safety function
I
ON state
O OFF state
1
Speed characteristic n of the motor
t
Time axis
tx Action instant
2
Feedback(s)
The restart behaviour can be set (C15300/1). Function sequence and error response have
no adjustable parameters.
}
Danger!
If the request for the safety function is cancelled, the drive will restart
automatically.
You must provide external measures which ensure that the drive only restarts
after a confirmation (EN 60204).
