![ABB FSO-21 User Manual Download Page 88](http://html.mh-extra.com/html/abb/fso-21/fso-21_user-manual_2728088.webp)
88 Safety functions
SS1 with speed limit activated SBC
In these examples, the SBC and drive STO functions are activated at a user-defined
speed limit.
With time monitoring (SS1-t)
The operation of the SS1-t function with speed limit activated SBC is described in the
time diagrams and tables below. For configuration, see section
with speed limit activated SBC
on page
With a safe speed estimate
A
SBC speed (parameter
): Speed limit below which the FSO activates the SBC
(brake) and drive STO functions while ramping.
B
SS1-t delay for STO (parameter
): Time after which the FSO activates the STO
function regardless of the motor speed.
C
SBC time to zero (parameter
): Time from the SBC activation to the moment
when the safety function is completed and the SS1 completed indication (parameter
) goes on. The acknowledgment becomes allowed. You must set this to the
estimated time in which the motor brakes to a stop from the maximum speed.
D
Response time (depends on system configuration, see page
Drive STO state
& indication
SS1 request
Motor speed
Time
SS1 state &
indication
1
6
2
5
SBC output
3
A
D
SS1 completed
indication
B
3b
- ->
C
4
Summary of Contents for FSO-21
Page 1: ... OPTIONS FOR ABB DRIVES FSO 21 safety functions module User s manual ...
Page 4: ......
Page 16: ...16 Safety instructions ...
Page 34: ...34 Safety information and considerations ...
Page 52: ...52 Overview ...
Page 236: ...236 PROFIsafe ...
Page 265: ...PROFIsafe 265 2 Select your CPU from the list 3 Install the FENA 21 GSDML file ...
Page 275: ...PROFIsafe 275 20 In ABB_Drive FB add blocks DPRD_DAT and DPWR_DAT 21 Insert values to blocks ...
Page 282: ...282 PROFIsafe 5 To read the diagnostic messages select the I O Device Diagnostics tab ...
Page 286: ...286 PROFIsafe ...
Page 304: ...304 Installation ...
Page 400: ...400 Configuration ...
Page 488: ...488 Verification and validation ...
Page 506: ...506 Fault tracing ...
Page 514: ...514 Maintenance ...
Page 536: ...536 Technical data ...