Lenze ELCAMZIxxx4SNNPSNN (LCU122) - Manual (Page 123)

Safety engineering
Safety functions
Safe torque off
7

123 EDSLCMX3024-SPS EN 5.0
7.5.4 Safe torque off
7.5.4.1 Description
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 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
n
0
1
t1
t 0
'1'
0
SMxDIASTO
 Input signal of the request of a safety function
’1’ Logic signal level ”1” / ”true”
 Speed characteristic n of the motor
tx Action instant
t Time axis
7.5.4.2 Conditions
Condition for using the function:
ƒ Software version 20
ƒ PROFIBUS communication must be established. ( 42)
ƒ PROFIsafe protocol according to ”PROFIsafe - Profile for Safety Technology”
specification, version 1.30, of the PROFIBUS user organsation (PUO)
ƒ
The device must receive PROFIBUS data telegrams from a master controller.

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).
7.5.4.3 Settings
This function does not have any parameters to be set.