Lenze SO30 8400 protec - Manual (Page 45)

Safety option 30
Safety functions
Safe torque off
5
l
45 EDS84DPSO01 EN 2.1
5.6 Safety functions
5.6.1 Safe torque off
Safe Torque Off/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).