Safety functions 55
Safe torque off (STO)
The STO function brings the machine safely into a no-torque state and/or prevents it
from starting accidentally. The STO function in the FSO module activates the drive
STO function, that is, opens the STO circuit in the drive. This prevents the drive from
generating the torque required to rotate the motor. If the motor is running when the
STO function is activated, it coasts to a stop.
You can configure the SBC function to be activated before, at the same time with, or
after the drive STO function. For more information on the STO function in the ACS880
drives, see the drive
hardware manual.
WARNING
! For the encoderless mode, you have to set parameters
and
so that the motor has enough time to stop from full speed when
modulation is stopped.
Note:
If the SSE is cascaded, STO activation also activates the SSE cascade
indication signal (output). See sections
on page
and
on page
Note
: Always set the parameters related to the STO function to have the correct
monitoring limit hit and fault reaction behavior. An internal monitoring of the FSO
module can trigger the STO function even if you have not defined an external request
signal. These internal monitorings trigger STO:
• SAR0, SAR1 or SSE/SS1 limit hit
• FSO module fail safe state.
Содержание FSO-12
Страница 1: ... OPTIONS FOR ABB DRIVES FSO 12 safety functions module User s manual ...
Страница 4: ......
Страница 12: ...12 Table of contents ...
Страница 26: ...26 Introduction to the manual The PROFIsafe certificate for the FSO 12 module is attached below ...
Страница 36: ...36 Safety information and considerations ...
Страница 136: ...136 Safety functions ...
Страница 196: ...196 PROFIsafe 5 To read the diagnostic messages select the I O Device Diagnostics tab ...
Страница 200: ...200 PROFIsafe ...
Страница 326: ...326 Start up ...
Страница 386: ...386 Dimension drawings ...