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124 Safety functions
SSE 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
The operation of the SSE with speed limit activated SBC and time monitoring is
described in the time diagrams and tables below. For configuration, see section
to configure SSE with speed limit activated SBC
on page
With a safe speed estimate
A
SBC speed (parameter
): Speed limit below which the FSO activates SBC
(brake) and drive STO functions while ramping.
B
): Time after which the FSO activates the drive
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 SSE 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
SSE request
Motor speed
Time
SSE state &
indication
1
6
2
5
SBC output
3
A
D
SSE 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 ...